Earth's Structure and Caves

   This week in science we studied about caves and also introduced Earth structure. 

Here are common things Earth's has: 

• Sphere (slightly oval)
• Has natural resources: minerals, oil, life trees, cotton plants, water, coal
• Most of its surface is water
• Full of life and nature
• Air (Oxygen)
• Temperature - Climate
• Water= rivers, lakes, oceans, aquifers, streams, deltas, gulfs, beaches, seas
• Land= valleys, mountains, hills, rain forest, urban jungles (cities), jungles

   In our class we also watched 2 Bill Nye videos: Earth's crust and Caves.

Earth's crust:

• Core - Solid iron - 1,500 F^ 
• Outer core - magma
• Mantel - magma - 1,200 F^
• Crust - thin layer where we live on -  mostly cool

Caves Properties:

• Stalagmites -  bottom 
• Stalactites - top
• Can be made by glaciers (very cold) or lava (when dried it becomes a cave)
• The temperature in caves doesn' t change
• Caves can be found 250 meter under the surface

   I want to learn more about the different types of caves and the inside of them.

   These different videos helped me understand and have an introduction to rocks.