1. Aim: How do we compare the spheres of the Earth?
Do Now: Describe one piece of evidence we know the Earth rotates.

2. The Three Spheres of Earth Activity
You will have 10 minutes to read about “The Three Spheres of Earth.”
Highlight or underline key terms and facts that describe each sphere.
You will create a word web by filling in all the branches of your web with key terms or facts about each sphere from what you gathering from your reading.
Lithosphere
Hydrosphere
Atmosphere

3. How do we describe the lithosphere?
Solid Layer
Continuous bedrock shell around the earth
Most dense
Solid rock material under ocean sediments
Composed of Rock and Soil
Lithosphere
Known as the Crust
Has other elements – aluminum, iron, calcium, sodium
Oxygen and Silicon – 2 most abundant elements
Thickness from 72 to 153 kilometers

4. Lithosphere

5. How do we describe the hydrosphere?
Liquid Layer
99% salt water & 1% fresh water
Oceans, lakes, rivers, streams, & groundwater
Water composed of 33% oxygen and 66% hydrogen
Oceans average depth of 3-5 km
Hydrosphere
Earth’s thinnest layer
Cover’s 70% of Earth’s surface
Less dense than the lithosphere

6. Water

7. How do we describe the Atmosphere?
Gas Layer
Troposphere contains the most mass of the atmosphere
Consists of 4 layers – troposphere, stratosphere, mesosphere, and thermosphere
Atmosphere (Troposphere)
Troposphere- temperature decreases with increasing altitude
Least dense of all the spheres
We live in the troposphere layer (lowest layer)
Air mixture consists of 78% Nitrogen and 21% Oxygen
Troposphere - only layer that contains water vapor and weather conditions

8. Atmosphere

9. Draw a bar graph to show the relationship between the density of each of sphere
High
Density
Low
Litho Hydro Atmosphere

10. Summary

11. Summary Extra Questions

13. How do we describe the lithosphere?

14. How do we describe the hydrosphere?

15. How do we describe the Atmosphere?
Atmosphere (Troposphere)

16. Draw a bar graph to show the relationship between the density of each of sphere
High
Density
Low
Litho Hydro Atmosphere