1.Three major types of stress in rock are tension compression and shearing. Tension affects the Earths crust because it pull it apart,and makes it thinner. Compression pushes rock against each other while, tension pulls them apart.
2. Tension in the Earths crust pulls rock apart forming a fault. Fault occur close to plate bounadries because there, there is a lot of movement forming faults. When plates diverge a reverse fault is formed. When plates pull apart a normal fault is formed.
I think the most epicenters are located near the border of tectonic plates, I believe the closer the earthquake to a tectonic plate the more it will read on the stronger the earthquake will be. The 9.5 earthquake (Richter Scale 0ut of 10) in Chile was really close to the border of to tectonic plates. Also a majority of Earthquakes occur near or in a fault, because the area is weakened.
Thursday, 27 January 2011
Wave Simulator Reflection
I tried out the wave simulator and I think it really represents how waves react to a fosit in diffrent positions. I like that they made it some you can adjust the amplitude and frequency, with a higher amplitude the drop is bigger and makes a thinker wave, with the frequency to maximum, there are more waves coming out through the foist. I learned that the wave takes shape of were it's made if it's made to the side, the wave will travel forward in arches, if the wave is formed in the middle it will travel in circles in all directions.
Making Waves Lab Report
Guiding Question: How do two waves interact traveling from different sides with a floating object in the middle of the tray, And which material travels the fastest through a wave.
Hypothesis: I think the cork travels the fastest through a wave.
Materials
Procedure
Observations
Styrofoam Ball - The ball stayed in the middle pretty much of the time, The waves slid over each other on each side. Over a period of time the styrofoam ball moved to the side.
Cork - The cork stayed in the middle then it moved to the side and went left and stayed, The waves slid over each other in the middle the formed arches in the middle, but the cork was unaffected.
Pencil - The pencil was in the middle but the slid out onto a side then it stayed there, the waves slid over each other in arches.
Record
Conclusion:
After I finished the tests I noticed a couple things, first the waves continued sliding over each other even though there was a floating object in the water the waves just ignored the object or pushed out to the side, but most of the time the object spent in the middle. The cork was the fastest from the three objects, I think it was the fastest because it was compressed, and it was small. While the pencil was long and in order for it to move the clay was spouse to hit it vertically.
Further Inquiry
I could have changed the experiment by using other liquids or other floating objects. It would take much more force to move an object in oil or honey because the medium is thick and it’s much harder to make waves the thicker the object.
Hypothesis: I think the cork travels the fastest through a wave.
Materials
- Tray
- Styrofoam Ball
- Cork
- Water
- Pencil
- Marker
- Timer
Procedure
- Fill the tray about 10 centimeters with water
- Put each object inside at different times And make a wave from each side with a marker.
- Record your observations
- Put each object inside on one side and time it how much it takes for the object to the other side
- Record the speeds
Observations
Styrofoam Ball - The ball stayed in the middle pretty much of the time, The waves slid over each other on each side. Over a period of time the styrofoam ball moved to the side.
Cork - The cork stayed in the middle then it moved to the side and went left and stayed, The waves slid over each other in the middle the formed arches in the middle, but the cork was unaffected.
Pencil - The pencil was in the middle but the slid out onto a side then it stayed there, the waves slid over each other in arches.
- The surface area effects the pencil when the markers spread out and hits the surface the pencil travels further and faster, when you tap it normally the waves do not reach the pencil.
Record
| Trial 1 | Trial 2 | Trial 3 | |
| Styrofoam ball | 16.53 seconds | 30.41 seconds | 10.53 seconds |
| Cork | 13.97 seconds | 29.88 seconds | 7.35 seconds |
| Pencil | 1 minute 21.04 sec | 16.60 seconds | 2 minutes 20.41 seconds |
Conclusion:
After I finished the tests I noticed a couple things, first the waves continued sliding over each other even though there was a floating object in the water the waves just ignored the object or pushed out to the side, but most of the time the object spent in the middle. The cork was the fastest from the three objects, I think it was the fastest because it was compressed, and it was small. While the pencil was long and in order for it to move the clay was spouse to hit it vertically.
Further Inquiry
I could have changed the experiment by using other liquids or other floating objects. It would take much more force to move an object in oil or honey because the medium is thick and it’s much harder to make waves the thicker the object.
Sunday, 16 January 2011
How Balls Bounce Off
In this experiment my partner and I used a door and a Styrofoam ball, a golf ball and a marble. We tested each ball three times. The Styrofoam one we tested first it was the slowest but 2/3 times it was really accurate. Next we tested the golf ball which was the fastest 2/3 times it wasn't that accurate but once it went in a straight line. And last we tested the marble it was least accurate but also the smallest the first few trail runs it ran of the sheet before it even touched the door.
The angle at which the wave hits and object the same angle it will bounce off. If for example it hit a wall diagonally it will bounce off diagonally just the other side, if it his the wall at a straight angle it would most probably come back straight. Speed and density affects the route of the ball. A wave a bounces off a surface it cannot pass. It does this by transferring it's energy to the surface and then the surface transfers the energy back, some of the energy is lost and that's why the energy stops.
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Wednesday, 12 January 2011
Wave Lab
In this lab my partner and me did nine tests 3 for each group. Three for no barriers three for one barrier and three for two barriers. 
No Barriers
In the first experiment the waves traveled quickly and met in the middle of the pan making a more dense part there. In the second experiment the waves slid through each other and continued on, the other wave just slowed it down. The waves in the third experiment intercepted each others way meeting in the middle but both of them continued there journey to the other side of the pan.
One Barrier
In the first experiment the waves hit the barrier and slightly bounced off in a slighter form. In the second experiment the waves break up and bounce of the wall they return back in a slighter form. In the third experiment the waves split up but later rejoin.
Two Barriers
In the first experiment part of a wave passe the pass and the other bounce off the play dough and come back. In the second experiment. In the second experiment most of the waves bounce off the play dough and a few pass through the opening and bounce off the other side. In the third experiment most of the waves hit the walls of the play door enclosure but a few pass through the openings and reach the other side.
Conclusion
After doing this lab I can see how waves interact with barriers and without and how even with small passes some of the waves manage to go through them. Waves always some how find a way to travel through another object even if it's another wave. They use diffraction to pass through a hole in a barrier. When ever waves reach each other which happens quite a lot they just pass through each other with a little decreased speed.
No BarriersIn the first experiment the waves traveled quickly and met in the middle of the pan making a more dense part there. In the second experiment the waves slid through each other and continued on, the other wave just slowed it down. The waves in the third experiment intercepted each others way meeting in the middle but both of them continued there journey to the other side of the pan.
One Barrier
In the first experiment the waves hit the barrier and slightly bounced off in a slighter form. In the second experiment the waves break up and bounce of the wall they return back in a slighter form. In the third experiment the waves split up but later rejoin.
Two Barriers
In the first experiment part of a wave passe the pass and the other bounce off the play dough and come back. In the second experiment. In the second experiment most of the waves bounce off the play dough and a few pass through the opening and bounce off the other side. In the third experiment most of the waves hit the walls of the play door enclosure but a few pass through the openings and reach the other side.
Conclusion
After doing this lab I can see how waves interact with barriers and without and how even with small passes some of the waves manage to go through them. Waves always some how find a way to travel through another object even if it's another wave. They use diffraction to pass through a hole in a barrier. When ever waves reach each other which happens quite a lot they just pass through each other with a little decreased speed.
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