Notes

Convergent boundary = compression
Mountains, volcanoes, subduction 
Divergent Boundary = tension
rift valleys, volcanoes, seaf

Lab Making Waves

MAKING WAVES

Guiding Question:
How does an object laying on the water interact with the waves?
(interactions lab)
Materials:
Water
Paper towl
Styrofoam ball
Eraser
Wine cork

Hypothesis:
I think that an object laying on the water will float and kind of block the wave but if the wave is to strong it will just travel with the wave.For example sponge will get some of the water inside and it will be heavier.

Type of Object	Observations
Sponge	The sponge traveled a bit, but it couldn’t stay floating for a lot of time because it sucked a lit of the water in it.
Paper Towel	The paper bowl just stay their and drown in the water and couldn’t block the wave at all
Eraser	The eraser blocked the wave and threw it to another direction.
Ping Pong Ball	It seems that when the frequency is more the ball travels faster and if it’s slow it takes more time for it to travel.
Styrofoam Ball	It travel a bit faster than the ping pong ball and the reason for that was that it was bigger.

Analyze and Conclude:
1.How are waves affected by the paper towel hanging in the water?
The paper blocked the wave a little, but it got to wet and wasn’t very efficient.
2.What happens when waves strike a barrier head on?When they strike it at an angle?
When the wave hits a barrier, the barrier blocks it and the wave direction changes to the sides and doesn't continue to flow throw the barrier.
3.What happens when waves strike a barrier with a gap in it?With three gaps in it?
If there is a gap in it cuts the wave and a little bit of it passes from the gap throw to the other side.

Conclusion:
In conclusion when you put a object in the water, it depends how big or small is the wave and that makes the speed of how it travels. If something you put is lighter obviously it would travel faster. For example sponge doesn’t really travel because it just gets the water inside after a moment and then drowns into the water.

Scinlinks

In Science class we looked at a site called scilinks.com. It was a really good site. If you had a code you could type that in and it would show you topic for teachers and students. I learned that it showed Earthquakes happening around the world by second. I found it really cool. It helped me understand waves more. Also I went to another site. The application was called waves simulator. It shows the waves in different directions. You can increase or decrease the frequency and it shows a lot of information and you can understand how the waves interact easier.

Questions Pg. 50

Q1:
a.What are the three main types of stress in rock?
Shearing, compression and tension.
b.How does tension changes Earth's crust?
 It creates Earthquakes and that creates holes/mountains.
c.Compare the way that compression affects the crust to the way that tension affects the crust.
Tension creates mountains and compression creates holes.


Q2:
a.What is a fault?
Faults are fractures in Earth's crust.
b.Why do faults often occur along plate boundaries?

Because the forces of plate motion push or pull the crust so much that the crust breaks

c.What type of fault is formed when plated diverge, or pull apart?

Tension

 d.What type of fault is formed when plates are pushed together?

Compression

Q3:

a.Name five kinds of landforms caused by plater movement.

mountains, continents, volcanoes, islands, and fault lines

b.What are three landforms produced by compression in the crust?
Volcanoes, fold mountains and plateaus are formed by compression.
 What landform is produced by tension?
Fault-block mountains and valleys are produced by tension.

Earth Dynamics

Earthquake Legend

Orange: Strong Earthquakes

Green: Medium Earthquakes

Yellow:Small Earthquakes

Blue: Almost no Earthquakes

Notes from class

Forces in Earths Crust

Ritcher Scale used to measure the magnitude of Earthquakes. The major Earthquakes happened in Japan and Chile.

How does stress in Earth's crust change Earth's surface?

The Earth's surface will get little mountains and places form. That is how the Earth started to create. It also made the continents and make them get a part from each other. This can cause folding, faulting, mountains, volcanoes, earthquakes, and rifts. When there is compression the ground pushes together and that also creates Earthquakes.

Where are faults located?

3 types of boundaries

1. Convergent boundaries(compression)
2. Divergent boundaries(tension)
3. Transform boundaries(shearing) 

Tension on Earth's crust pulls rock apart,causing normal faults.There are many faults in the world, one is Great Rift Valley of Africa, another is in Michigan on Pen Island, and one in San Andreas.

Bill Nye The Science Guy!

• The surface of the earth is floating on magma. 
• The earths surface is flexible. 
• When the surface is stretched a lot you get a earthquake.
• Lava comes out for the same kind of rock which we see but it's under the earths surface and lava makes it hot and you can rip brake easily inside.
• The earths surface is on top of the lava(magma).
• Heat makes the plates move.
• When plates scratch or touch each other they create mountains.
• Lava comes out of some kind of liquid and then it freezes.
• Epicenter is a the point on the Earth's surface directly above the focus of an earthquake

3 types of boundaries

1. Convergent boundaries(compression)
2. Divergent boundaries(tension)
3. Transform boundaries(shearing) 

Wave Angles

We did a project on class by using different kind of objects. We used a poster and then threw the ball and followed the direction of it by marking the place with different colors. I learned that if I started from one corner the ball we used goes to the other way and that happened a lot of time. I used a golf ball, plastic ball and also a table tennis ball.

Wave Interaction

In class we did an experiment on wave interaction with a partner. We got a big tray filled with water. Then with board markers we pressed in the corners to see how the waves traveled. After we added barriers to different places and also changed the places that we pressed with the board markers. With my partner we drew three sketches of each;without barriers, one barrier and two barriers.