(.3.)

EARTH - Koyuki from Kara MacDevitt on Vimeo.

I hope you Enjoy this video!

Air mass

Lesson Aim for Air Mass

• What is Air Masses and how they form?
• What are the different type of Air Masses?
• What are the Continental, Martine, Tropical and Polar Air?
• Where each type of Air masses came from?
• How each Air affect the weather?

Essential Question

• What types of air masses exist on Earth?

Plate tectonic theory

Question:Do you agree with the theory of plate tectonics?

 Plate Tectonics is one idea of Earth Science. Plate Tectonics say before 200 million years, Earth only had one land and that call "Pangaea" but now we has 7 lands, Why? because Plate are moving. Now Pangaea are divide by 7 part. When mantle are moving, plate are move together and that is create plate moving.

Some time Earth had big wave,  we call that Earth quake. But why Earth quake are happening? some time is cause by Faults, and some time it's cause by plate boundary. When plates moving, some time it's create big wave. this wave is Earth quake. So Earth quake is on big evidence. If plate are not moving, Earth quake are not happening.

see this diagram. This diagram show Africa and South America. This both land has same edge. and some time both land has same fossil. This mean before Africa and South America are one land but now they are be separated.

Now Plate are still moving but it's so slowly. Some scientist think after 250 million year Earthlook like this.