Where does the majority of geologic activity occur? Why do you think that? What evidence could you provide? What do you think are 4 general ways that a.

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Presentation transcript:

Where does the majority of geologic activity occur? Why do you think that? What evidence could you provide? What do you think are 4 general ways that a plate can move against another plate?

What causes Tsunamis? A Tsunami occurs when a moderate to sever earthquake occurs underwater, which displaces the water. Watch this video An Earthquake in Chile can Affect Hawaii due to tsunami formation

What causes an earthquake? When two plates are moving past each other sometimes the plates get stuck and it builds up energy this is called stress. The more stress the more powerful the earthquake. This stress can also result in large visible faults.

Focus is not JUST what we tell you to do all the time :D Focus is where the earthquake originates underground Epicenter is the spot on the surface directly above the focus

Do the BODY WAVE! Body waves travel through the Earth. There are 2 types P waves and S waves P waves (primary) are longitudinal and are able to pass through solid, liquid, and gas. They are the FASTEST! S waves (secondary) are transverse and can only travel through solids. They are slower than P waves. *Tricks to remember-P comes before S in the alphabet S waves only go through ‘S’olids and ‘S’ slow

Imagine... Which is more dangerous? You have a house sitting on the ground and there is an earthquake. If it is a Longitudinal wave the house will shake the house back and forth in a side to side motion. If it is a Transverse wave the house will move up and down vertically.

Surface Waves These are the slowest, and are transmitted when a wave reaches the surface. Not only can these waves cause building damage, but it can shake large amounts of soil and rock and cause land slides.

Plate Movement Plates interact differently depending on the way in which they are moving.

Now... Make Connections 1. Density & Earth’s Layers 2. Tsunami & Earthquake 3. Geologic Activity & Plate Boundaries 4. Stress & Fault 5. Focus & Epicenter 6. Body Waves & Surface Waves 7. P Waves & S Waves 8. Longitudinal Waves & Transverse Waves