Tuesday, May 25, 2010

final notes

friction-
net force-
Inertia:
  1. how could you use a roller skate, a sidewalk and water to demonstrate how rolling friction works? the water would slow you down because it slows your rolling friction.
  2. A marble lying in the middle of the floor, use Newton's laws to describe what would happen to the marble? The marble will not move until a force acts upon it. The gravity is pulling down on the marble and the floor is pushing up on the marble.
  3. a broom strikes the marble while you are sweeping. Use Newton's laws to describe what will happen to the marble? this relates to the 1st law because a force acts upon it to make the marble move.
  4. Use newton's 3rd law to describe what interactions there is between the marble and the broom. if you push the marble with a certain force the marble is going to push back with a force also. This means for every action there is a reaction.
  5. What force must be applied to a 10kg object to make it accelerate to 6m/s2? 60Newtons
  6. Why is terminal velocity an example of balanced force. you cant go any faster because of air resistance. The falling force is as hard as the air resistance.
  7. When you step out of a boat on to a dock, the boat moves. Why? For every action there is a reaction. The boat is pushing so are you.
  8. Describe circular motion. Which of Newton's laws helps you describe circular motion? the 2nd law because the object will accelerate in the direction of the force
  9. if action and reaction force pairs are equal and opposite how can anything move? give an example. rocket. row boat. they act of different things.

Wednesday, May 12, 2010

chapter 19 notes Newtons 3rd law

  • Newtons 3rd law states that a force always in equal and opposite pairs and for every action there is an equal and opposite reaction.
  • Action-Reaction forces-are always the same but they push or pull in opposite directions

Tuesday, May 11, 2010

  • Gravitational force- is also known as weight
  • The second law explains how to calculate the acceleration of an object if its mass and the forces acting on it are both known.
  • In circular motion, the centripetal force is always perpendicular to the motion.
  • Terminal Velocity is reached when the force of gravity is balanced by air resistance.
  • An object can speed up, slow down, turn in direction of the net force, if unbalanced forces act upon.

Newton's 2nd law of motion Notes 5/11/10


Newton's 2nd law of Motion-
~Connects force, mass, and acceleration
~Explains that an object acted upon by a force will accelerate in the direction of the force.
~Force=mass*acceleration
Gravity-
~an attractive force between two forces
~depends on the mass and distance between 2 objects

Tuesday, May 4, 2010

pg. 550-555 ? 1-6

  1. The turn creates friction between the wheels and the ground when the wheels are rolling and turning.
  2. Static friction is between the atoms on two surface that are in contact.
  3. Friction adds resistance between two touching surfaces therefor it made discovering newton's first law of motion complicated.
  4. No its not moving because the net force is zero.
  5. A) unbalanced B) balanced C) unbalanced
  6. Static friction is caused by atoms on the two surfaces are in contact this causes them to stick or weld together. Sliding friction slows down an object that slides. Rolling friction occurs between the ground and part of the tire touching the ground. this keeps the tire from slipping on the ground.
  • BONUS QUESTION--How does a space shuttle taking off relate to Newton's 1st law? It starts with zero for speed and gains speed going in a straight line therefore relating to Newton's 1st law.

Newton first law Notes

Force-push or a pull
  1. The combination of all forces acting upon each other is net force.
  2. Balance Forces two forces acting upon each other that balance each other out.
  3. Unbalance force when one force is larger than the other.
Newton's 1st law- an object will remain at rest or moving with a constant speed unless a force is applied.

Friction- is a force that resists sliding between two touching surfaces through air or water.
  1. Friction slows objects down.
  • 3 Types of Friction:
  1. Static friction- friction that prevents an object from moving
  2. Sliding friction- friction due to roughness between two objects
  3. Rolling Friction- Friction between the ground and the wheel.

Thursday, April 29, 2010

Motion Test note!

  1. Speed- how fast something is going(m/s-distance divided by time)
  • Average speed-how fast you covered a certain distance
  • Velocity- speed and direction.(m/s + direction going)
  • Acceleration-the process of speeding up(m/s2)
  • Negative acceleration-the process of slowing down(-m/s2)
  • Mass-How much matter is in an object(g, kg)
  • Inertia-the resistance to stop an object
  • Momentum-mass times velocity of an object the measure of an objects resistance to stopping(p=kg*m/s)
  • Displacement-the actual distance you cover from one point to another
  • Distance-the actual distance of point
  • Law of Conservation of Momentum-the total momentum of objects that collide together is the same before and after they collide

Questions-examples-
  1. The distance ways-constant, different directions, deceleration and acceleration.
  2. A car travels 10km north, 5 km east, 15km south, then 5km north. What is the distance traveled.-35km. What is the displacement.-k=5km east
  3. An Object's velocity chanves from 30 m/s-23m/s in 3 seconds. What is the acceleration? (23m/s-30m/s/3s= -2 1/2 m/s2)
  4. A 5kg object moving at 20m/s collides with an object that is 10kg moving at 5m/s. They stick together and move off. What is they're final velocity? (5kg*20m/s+10kg*5m/s=>100kg*m/s+50kg*m/s divide by total weight=>10m/s

Wednesday, April 21, 2010

Motion Chapter review pg. 544 #1-30

1) Both are telling you how fast you are going.
2) Without acceleration you wouldn't be able to reach a certain speed of velocity.
3) Without velocity you wouldn't get to a steady momentum
4) Momentum is how hard it is to stop something using velocity and mass, and the las tests the total momentum of objects that collide.
5)Mass helps tell the outcome of how fast the momentum is going and how hard it will be to stop it.
6) Mass is a factor of inertia.
7) Momentum helps predict what inertia will do to an object
8) Average speed calculates all of seeds an object has traveled and instantaneous speed is an instants speed.
9)d
10)a
11)c
12)a
13)d
14)a
15)c
16)d
17)c
18)c
19)Your average speed would increase because the faster you run the same distance, your speed increases.
20)Between the acceleration of 0 and 3s, the speed has a steeper increase than between the 3 and 5 acceleration.
21)1m/s2
22)They bounce off each other.
23)30m west
24)You go backward and the ball goes forward.
25)It decreases speed as it goes up and increases speed as it comes back down.
26)The constant speed.
28)5m/s
29)1200km
30)a is going the fastest and c is going the slowest.

Tuesday, April 20, 2010

Notes-Momentum-4/20/10

mass-the amount of matter in an object
inertia-the tendency of an object to resist a change in motion.
momentum-measure of how hard it is to slow an object down.
P=momentum
P=mass(velocity)=grams * meters/second
Law of conservation of momentum- the total momentum of objects that collide with each other.




Monday, April 19, 2010

questions 1-4 pg.538

1) When the golf club hits the golf ball some of its momentum is transferred to the golf ball. The golf club slows down and the golf ball speeds up.
2) yes because it is moving the same speed.
3) The cue ball hits the other billiard balls and the cue ball slows down decreasing the momentum, but the billiard balls speed up and their momentum increases.
4) The law of conservation of momentum enables the speed of the objects to be calculated after the collision and will move in the opposite direction the force came from.

Thursday, April 15, 2010

Motion Vocabulary

speed-the distance traveled by the time taken to travel that distance. What was Morgan's speed when she ran the mile?
average speed-the total distance traveled by the time taken. What is Josh's average speed for running the 100m dash.
instantaneous speed-the speed of an object at one instant of time. Torri's instantaneous speed was 4km/hr.
velocity-the speed of the object and the direction of its motion. What was the velocity of the baseball?
acceleration- the change in velocity divided by the time it takes for the change to occur. Mr. Conrad's acceleration was constant.
mass- The amount of matter in an object. The mass of the cow was bigger than the mass of a baseball.
inertia- The tendency of an object to resist change in its motion. The horse had a very high inertia.
momentum- To measure how hard it is to stop an object and depends on the object's mass and velocity. When the bowling ball hit the pins some of its momentum transferred to the pins.
law of conservation of momentum- the total momentum of objects that collide is the same before and after the collision. When Jason and James collided it proved the law of conservation of momentum to be correct.

Tuesday, April 13, 2010

Pg. 528-532 ?'s 1-6

1) Speed is the distance traveled divided by the time take to travel that distance. Velocity is the speed of the object and the direction of its motion. Acceleration is the change in velocity divided by the time it takes for the change to occur.
2) Its going at a constant speed and then is slowing down.
3) You have a positive acceleration.
4) 1/4 acceleration
5) 19.6 is the total speed.

Notes 4/13/10

  • Acceleration- Change in velocity divided by the time change to occur; speeding up, slowing down and or changing a direction.
  • Acceleration can be calculated if you know how an objects velocity has changed during a given time period
  • The Formula- A(acceleration)={SF(final speed)-SI(speed initial)}/Time
  • Unit for acceleration=(m/sec^2) Meters per second square
  • Acceleration is positive when an object is speeding up.
  • Acceleration is negative when an object is slowing down.
  • Accelerated motion can be graphed with speed on the vertical axis.
  • When an object is speeding up the graph has a positive slope(going to the right and up)
  • When an object is slowing down the graph has a negative slope(going to right and down or left)
  • A horizontal line indicates zero acceleration and is going at a constant speed.

Tuesday, March 30, 2010

Motion-Notes 3/30

  • Matter is always moving.
  • Motion involves a change in position.
  • Distance is the length of the route an object travels when it changes position.
  • Displacement is the distances and direction an object moves
  • Speed is the distance traveled divided by the time it takes to travel that distance.
  • Average speed is the total distance traveled divided by the total time
  • Instantaneous speed is the speed an object is traveling at one moment.
  • Constant speed is when an object is traveling at the same speed for over a period of time.
  • Velocity is the speed of an object and its direction

Monday, March 29, 2010

pg. 522-527 questions

1)the speed of the object and the direction the object is going in
3)13m north and 5m east i subtracted the south from the north ad the west from the east
4) .3 m/s
5) 2hr 10 mins

speed-distance traveled divided into the time taken to travel that distance
average speed- dividing the total distance traveled by the time taken
instantaneous speed-the speed of the object at one instant of time
velocity-the object's speed and the direction of motion

Tuesday, March 23, 2010

pg. 266-267 #1-25

1) carbon film
2) principle of superposition
3) uniformitarianism
4) unconformity
5) half-life
6) fossil
7) radiometric dating
8) permineralized remains
9) cast
10) a-fossil
11) c-made of hard parts
12) b-mold
13) d-uniformitarianism
14) d-relative age
15) c-disconformity
16) d-,43,2,5,1
17) d-radioactive decay
18) Everyday new fossils are being discovered and not all of them are found yet therefore earth's fossil record of life is incomplete.
19) To learn about the ages of sedimentary rock you could use radiometric dating which would create half-lifes.
20)
21)
22)
23)
24)
25)

absolute age-
carbon film-
cast-
fossil-
half-life-
index fossil-
mold-
permineralized remains-
principle of superposition-
radioactive decay-
radiometric dating-
relative age-
unconformity-
uniformitarianism-

Monday, March 22, 2010

radiometric dating notes 3/22/10

radiometric dating- use of half-lives to determine the age of something
Potassium to argon-used to date rocks
carbon 14- used to date fossil, wood, bones and stuff that used to be alive
uniformitarianism-earth processes occurring today are similar to processes from the past

Wednesday, March 17, 2010

3/17/10 Chapter 9 section 3 NOTES!

VOCABULARY!
Absolute age-
the age, in years, of a rock or other objects
radioactive decay- the process of breaking down
half-life-the time it takes for half of the atoms to decay
radiometric dating- the radiometric isotopes in an organism breaks down from this you can tell how old something is. EXAMPLE: potassium-40 to argon-40 after about a billion years.
Uniformitarianism-this explains that earthly processes that happened a long time ago are similar to those that are happening today.

QUESTIONS 1-5
1) The layers below it are older and the layers above it are younger.
2) 17190 years
3) This principle states that earthly processes that happened a long time ago are similar to those that are happening today.
4) The radiometric isotopes in an organism's decay after billions of years to an isotope without radioativeness left in it.
5) It was never living!

Thursday, March 11, 2010

Notes 3/11/10

Absolute age-
a) age in years of a rock or other object determined by properties of atoms
b) unstable isotopes break down into other isotopes and particles in the process of radioactive decay
1) Beta Decay- an isotope's neutron breaks down into a proton and an electron with the electron leaving the atom as a beta particle a new element forms due to proton gain.
2) Alpha Decay- an isotope gives off 2 protons and 2 neutrons as an alpha particle; a new element forms.
3) the time it takes for half the atoms in an isotope to decay to the isotopes half life

Wednesday, March 10, 2010

pg. 250-255 ?'s 1-5

1) Discuss how to find the oldest paper in a stack of papers? They are undisturbed and on the bottom.
2) Explain the concept of relative age? It is the age of something in comparison to the ages of other things.
3) Illustrate a disconformity? A layer of horizontal rock once exposed and eroded
4) Describe one way to correlate similar rock layers? One way to correlate similar rock layers is to match up layers of rock over great distances.
5) Explain the relationship between the concept of relative age and the principle of superposition. Relative age is the age of something in comparison to the ages of other things. The Principle of superposition is that the oldest rocks are on the bottom and the rocks become younger toward the top.

Monday, March 8, 2010

Notes. 3/8/10

RELATIVE AGES OF ROCKS!

Principle of Superposition- process of reading undisturbed rock layers
-oldest rocks are in the bottom layer.
-younger rocks are in the top layer.
Relative Age- how old something is, in comparison with something else
-the age of undisturbed rocks can be determined by examining layer sequences
-the age of disturbed rocks may have to be determined by fossils or other clues.
Unconformaties- gaps in rock layers
-Angular Conformity- rock layers are tilted and younger sediment layers are deposited horizontally on top the eroded and tilted layer
-Disconformities- a layer of horizontal rock once exposed and eroded
-Non Conformity- layers of sediment form over igneous or metamorphic rock

Notes. 3/4/10

1) Fossils form if the organism is quickly buried.
2)Hard parts of organisms are more likely to be Fossilized than soft parts.

Types of Preservation-

1) Per-mineralized Fossils- Fossils in which spaces are filled with minerals by moving ground water
2)Carbon Film- When an organism is broken down carbon film a silhouette is left behind.
3)Molds-cavity in rock made when an organism is buried.
4)Cast- sediments move into a mold and create a cast.
5)Occasionally, organisms are preserved in ice, tar, or amber.
6)Trace Fossils- Evidence of organism activity.
7)Index Fossils- abudeant geographically widespread organisms that existed for a short period of time

Types of Preservation-
1) Per-mineralized fossils- Fossils in which spaces are filled with minerals by moving ground water-
2) Garbon Film- When an organism i s broken down carbon film a silhouette is left behind.
3) Molds0 Cavity in rock

Wednesday, March 3, 2010

Notes 3/3/10

Paleontologist- A scientist who studies bones and fossils to reconstruct what animals looked like in the past.
Fossils- remains, imprints, or traces of prehistoric organisms.

Tuesday, March 2, 2010

pg. 249 ?'s 1-5

1) Describe they typical conditions necessary for fossil formation. one way is for a dead organism to become a fossil is they have hard parts such as bones, shells, or teeth.
2) Explain how a fossil mold is different from a fossil cast. mold- the cavity in the rock. cast- a mineral rich water of other sediments might enter the cavity, form a new rock, and produce a copy
3) How are the characteristics of an index fossil are useful to geologists. it is a way to approximate the ages of rock layer.
4) Describe how carbon films form. Fossils usually form when sediments bury a dead organism. As sediment piles up, the organism's remains are subjected to pressure and heat. These conditions force gases and liquids from the body. A thin film of carbon residue is left, forming a silhouette of the original organism.
5) What can you say about the ages of two widely separated layers of rock that contain the same type of fossil? I think that maybe history repeated its self and there was another ice age or some other period of time where the same kind of animal or organism died and the remains were left in the ground.

Thursday, February 11, 2010

Hurricane-Natural Disaster Project

A hurricane is a severe storm, that forms in the southern Atlantic Ocean, Caribbean Sea, Gulf of Mexico or in the eastern Pacific Ocean. Hurricanes need warm tropical oceans, moisture and light winds above them. If the right conditions last long enough, a hurricane can produce violent winds, incredible waves, torrential rains and floods.

Hurricanes rotate in a counterclockwise direction around an "eye." Hurricanes have winds at least 74 miles per hour. There are on average six Atlantic hurricanes each year; over a 3-year period, approximately five hurricanes strike the United States coastline from Texas to Maine.

When hurricanes move onto land, the heavy rain, strong winds and heavy waves can damage buildings, trees and cars. The heavy waves are called a storm surge. Storm surge is very dangerous and a major reason why you MUST stay away from the ocean during a hurricane warning or hurricane.With hurricanes being as powerful as they are, it is not surprising that upon landfall they cause damage and destruction. Even when the hurricane has yet to make landfall, its effects can be dangerous. However, most of the damage caused to man and nature occur as a hurricane makes landfall. Strong Winds, Flooding, Storm Surge, Tornadoes, Rip Tides.



Each of the above phenomena can turn a hurricane into a home-wrecker, a nature-destroyer, and even a killer. Some tropical storms that make landfall cause damage in these ways, but very rarely do they do so in as significant a manner as do hurricanes.

Assuming you choose to remain in your home during the storm, there are a number of steps you should take to stay as safe and comfortable as possible. But you need to be aware that during hurricanes, it is not the winds that cause the majority of death and destruction, but water/flooding from tidal surge. That is why there are mandatory evacuations. Once the tidal surge hits, there is no escape!
  1. Board up all windows to help prevent broken windows, which will also help prevent further damage to the interior of your home, and will help prevent injury from broken glass.
  2. Secure all outdoor furniture to reduce the amount of damage to it, and to help prevent it from being thrown against your (or someone else's) home, and causing more damage to the exterior of the home and the outdoor furniture.
  3. Turn off gas to prevent gas leaks from broken or damaged gas lines.
  4. Stock up on battery powered flashlights, candles, and have a battery powered radio.
  5. Stock up on bottled water, as well as non-perishable foods that can be prepared and eaten without having to be cooked. Be sure to have enough food and water to last for everyone in the home for a week, including pets. And don't forget a can opener and a clean, sharp pocket knife.
  6. If you have an infant on a bottle, have enough bottles on hand so that you won't have to worry about how you can wash them if there is no clean water. And be sure to either have single use sized cans of formula, or an ice chest with plenty of ice to store any opened cans of formula.
  7. Stock up on anti-bacterial hand wipes, gel hand cleaners and paper towels in the event there is no water for washing or bathing.
  8. Have a two week supply of any prescription medications, as well as personal care items (tooth brushes and paste, hygiene products, etc.).
  9. Have a well stocked first aid kit in the event of injuries. Disinfectants, antiseptics, antibiotic creams, bandanges, cotton balls, aspirin, Tylenol, and a thermometer are some of the basics you need.
  10. Make sure all vehicles have a full gas tank.
  11. Have several changes of clothing for each member of the household, and if you have a baby still in diapers, have a two week supply on hand.
  12. Select the innermost part of your home, on the ground floor, to ride out the storm, but not a basement or cellar. In the event of flooding, being in those areas of your home may make it impossible to escape. Stay away from all windows and glass doors!
  13. Have mattresses, blankets, pillows, etc. already in place before the storm hits.
  14. It would also be a good idea to purchase a bedside commode in the event the water and plumbing is rendered out of order during the storm. You can line the receptacle bucket with small garbage bags to make clean-up much easier and more sanitary. These can be purchased from any medical supply store, as well as many drug stores.
  15. Have a supply of books, puzzles, toys, etc. in the event the electricity is off, especially if you have children.
  16. You may want to purchase a portable generator, which costs about $500 for an average sized one. This is especially important if someone in the household is on oxygen or other electrical powered medical equipment; it will also keep the foods in your refrigerator/freezer from spoiling in the event of an electrical outage. But if you do use a generator, be sure to follow all instructions and safety precautions that come with it, and do not operate it indoors (carbon monoxide!).
  17. Fill all bath tubs with clean water; it can be used for sponge baths, flushing toilets, etc. But if there are young children or pets in the home, be sure the door is kept securely closed at all times to prevent a child or pet from falling in the tub and drowning. A young child can drown in two inches of water!
  18. Go over emergency instructions with everyone in the household such as everyone staying together, away from all windows, etc.
  19. Also, if there are several members in the household, develop an "accounting system", where everyone is accounted for at all times in the event the storm gets really intense. Since tornadoes are common during hurricanes, this system is extremely important.
  20. Since water/flooding caused by tidal surge is the leading cause of death and destruction in hurricanes, it is crucial to be aware of your surroundings. If you observe water coming into your house, get to an upper floor immediately.
  21. If you have pets that stay outside, bring them in during the storm; they deserve safety and comfort, too.
  22. Have enough cash on hand to last for a while in the event you can't get to the bank or an ATM.

Do not wait until the last day to purchase supplies (food, water, etc.) or you run the risk of there being very little, or even none, of the supplies left that you need. It's a good idea to stock up on all non-perishables at the beginning of hurricane season.
It would also be a good idea to have a cell phone, fully charged, with you so you will have a way to call emergency services
if needed, and to contact family/friends to let them know if you are all ok. Just keep in mind, though, that the cell towers may not be working for a while, so it would be a good idea to have a back-up plan to notify family/friends.So you've followed all the preparations – you've made a plan, you've filled up your car's gas tank, you've gathered all the supplies for your disaster kit and your valuable documents are tucked away in a waterproof container. Now what? No one has told you what to do now. How do you keep yourself and your family safe when the hurricane arrives?
Make sure your windows are protected and your home is secured.Check your disaster supplies kit. Make sure you have water, non-perishable food, medications and don't forget that non-electric can opener.Clean containers for cleaning water. Line the bathtub with plastic sheeting or a clean shower curtain, or caulk the drain with silicone caulking — it holds water for weeks and cleans up easily when dry. Plan on three gallons per person, per day for all uses (including flushing the toilet).
During the storm. Howling winds, driving rain and the threat of tornadoes make riding out a hurricane a scary ordeal. Follow these tips for staying safe in your home during a hurricane:
  • Stay inside and away from windows, skylights and glass doors. Find a safe area in your home (an interior room, a closet or bathroom on the lower level).
  • If flooding threatens your home, turn off electricity at the main breaker.
  • If you lose power, turn off major appliances such as the air conditioner and water heater to reduce damage.
  • Do not use electrical appliances, including your computer.
  • Do not go outside. If the eye of the storm passes over your area, there will be a short period of calm, but at the other side of the eye, the wind speed rapidly increases to hurricane force and will come from the opposite direction. Also, do not go outside to see "what the wind feels like." It is too easy to be hit by flying debris.
  • Beware of lightning. Stay away from electrical equipment. Don't use the phone or take a bath/shower during the storm.
After the storm. Typically, more deaths occur after a hurricane than during. These deaths come from people being too anxious to get outside and survey the damage where they come into contact with downed power lines or unstable trees, etc. Follow these suggestions for staying safe after the hurricane:
  • Remain indoors until an official "all clear" is given.
  • Do not touch fallen or low-hanging wires of any kind under any circumstances. Stay away from puddles with wires in/near them. Do not touch trees or other objects in contact with power lines.
  • USE PHONES ONLY FOR EMERGENCIES. Call 911 only for life-threatening situations.
  • Call police or utility companies immediately to report hazards such as downed power lines, broken gas or water mains, overturned gas tanks, etc.
  • Watch for weakened roads, bridges, tree limbs or porches which could collapse unexpectedly.
  • After power is restored, check refrigerated food for spoilage. (Spoiled food is the cause of much sickness two days to a week after the storm.)
  • When reinstalling a CB, TV or satelitte antenna, check in all directions to be sure no power lines are nearby. The same goes for climbing trees to clear debris.
  • Do not operate charcoal grills, propane camping stoves or generators indoors.

http://goflorida.about.com/od/floridaweathe1/a/hurricane_safe.htm

Tuesday, February 9, 2010

Test Review 2/9/10

Earthquakes-what causes earthquakes?
- Large vibrations moving through rocks and minerals
- elastic rebound- stored potential energy that is released
Faults-
1) strike slip-caused by sheared forces
2) reverse-caused by compression forces
3) normal-caused by tension forces
Seismic Waves-waves moving through the ground which are released by potential energy in faults.
Primary Waves-causes rocks to move back and forth in the same direction as the wave
Secondary Waves-causes rocks to move at right angles to the wave
Surfaces Waves-destruction
Epicenter-the point the earthquake starts at the surface
Focus-directly below the epicenter
Mercalli's Scale- Scale of damage on a scale of 1-10
Seismic Safe-buildings that are safe against earthquakes

Monday, February 8, 2010

pg. 236-237 ?'s 1-24

1)Fault-the surface of such a break along which rocks move
Earthquake-movement of the ground that occurs when rocks inside Earth pass their elastic limit, break suddenly, and experience elastic rebound
2)Shield Volcano-large broad volcano with gently sloping sides that is formed by the buildup of basaltic layers
Composite Volcano-steep-sided volcano formed from alternating layers of violent eruptions of tephra and quieter eruptions of lava
3)Focus-point deep inside Earth where energy is released, causing an earth quake
Epicenter-point of Earth's surface directly above an earthquake's focus
4)Seismic Wave-earthquake waves, including primary waves, secondary waves, and surface waves.
Seismograph-instrument used to record seismic waves
5)Tsunami-powerful seismic sea wave that begins over an ocean-floor earthquake, can reach 30 m in height when approaching land, and can cause destruction in coastal areas.
Seismic Wave-earthquake waves, including primary waves, secondary waves, and surface waves.
6)Epicenter-point of Earth's surface directly above an earthquake's focus
Earthquake-movement of the ground that occurs when rocks inside Earth pass their elastic limit, break suddenly, and experience elastic rebound
7)Cinder Cone Volcano-relatively small volcano formed by moderate to explosive eruptions of tephra
Shield Volcano-large broad volcano with gently sloping side that is formed by the buildup of basaltic layers
8)d-convergent
9)a-volcano
10)b-hot spots
11)c-basaltic
12)d-composite
13)b-cinder cone
14)a-primary
15)d-tsunami
16)b-epicenter
17)Its right over a hot spot.
18)Cinder Cone Volcano-relatively small volcano formed by moderate to explosive eruptions of tephra
Composite-steep-sided mountains composed of alternating layers of lava and tephra
19)
20)
21)
22)
23)
24)

Wednesday, February 3, 2010

Notes 2/3/10

Four types of Volcanoes:
1) Shield Volcanoes-basaltic lava, which flows easily. forms a broad volcano with gently slopping sides. Largest type of volcanoes. Form where Earth's plates are separating and magma is forced upward between plates.
2) Cinder Cone Volcanoes-high gas content in magma. Explosive, but short lived eruptions. Forms a small come of tephra.
3) Composite Volcanoes-made of alternating layers of lava and tephra. Steep sided mountains. Forms where Earth's plates collide and one is forced underneath each other called subduction zones.
4) Fissure Eruption- Magma is fluid. Ozzes from the cracks in the earth. Magma flows freely across land called flood basalts. Most of the Earth's crust beneath the ocean is flood basalts.

Tuesday, February 2, 2010

pg. 226-231 ?'s 1-5

1. Along which type of plate boundary has the Soufriere Hills volcano formed?
*The Soufriere Hills volcano formed where plates converge.
2. At which type of plate boundary does rift-volcanism occur?
*Divergent Plate Boundaries
3. Explain how volcanoes in Hawaii form.
*The Hawaiian Islands are islands that did not form along a plate boundary. Large bodies of magma, called hot spots, are forced upward through Earth's mantle and crust.
4. Why do most deep earthquakes occur at convergent boundaries?
*They occur where tectonic plates come together.
5. Subduction occurs where plates converge. This causes water-rich sediment and altered rock to be forced down to great depths. Explain how water can help form a volcano.
*The water is heated so it turns into steam and expands and pushes up the surface of the Earth causing a volcano.

Monday, February 1, 2010

Hey Guys!

I got a new blog for science!! lol!! :)