- Atmosphere: Composed of gases like nitrogen, oxygen, carbon dioxide, and argon; has five layers with no definite boundaries; "Atmos" means air.
- Geosphere (Lithosphere): Made of rocks and minerals; contains natural resources and life; ranges 40–240 km deep; "Geo" means earth.
- Biosphere: Largest sphere containing life; includes abiotic and biotic factors; most life found 10 ft below ground and 600 ft above ground; "Bio" means life.
- Hydrosphere: Includes oceans, rivers, lakes, groundwater, and glaciers; organisms live in salt and freshwater; 10–20 km thick; "Hydro" means water.
- Interactions between these spheres drive Earth’s processes.
Parent Tip: Review the logic above to help your child master the concept of earth s spheres worksheet.
