- This sphere is the solid part of the Earth. It is called the
geosphere.
- It is formed of three layers: the
crust, the
mantle, and the
core.
- This layer includes all of the
gases that surround the Earth. It is called the
atmosphere. It is formed of 78%
nitrogen, 21%
oxygen, and 1% other
gases.
- This is the
hydrosphere. It is formed of all the
water on Earth (except the
water vapor in the atmosphere).
- This sphere is called the
biosphere and it is where all the
plants,
animals, and
microorganisms live.
Parent Tip: Review the logic above to help your child master the concept of earth s spheres worksheet.