1. The Spheres of Earth
(text ref. page )

2. What features of Earth can you see?
I Spy…
What features of Earth can you see?

3. What features of Earth can you see?
I Spy Cont’d..
What features of Earth can you see?

4. What features of Earth can you see?
I Spy Cont’d..
What features of Earth can you see?

5. Learning Goals We are learning the 4 spheres of the earth.
We are learning the interactions of the 4 spheres of the earth.

6. The Spheres of Earth The Earth is comprised of 4 spheres: atmosphere
lithosphere
hydrosphere
biosphere
Video

7. (1) The Lithosphere the rocky outer shell of Earth
consists of rocks and minerals
makes up the mountains, ocean floors and the rest of Earths solid landscape

8. (2) The Biosphere
where life can exist within the atmosphere, lithosphere and hydrosphere
conditions required for life must be met but resources are limited

9. Let’s Watch!

10. (3) The Atmosphere the layer of gases extended upward from Earth
made up of 78% nitrogen gas, 21% oxygen gas and other gases
moderates temperatures and blocks some harmful solar radiation

11. (4) The Hydrosphere
all of Earth’s water in solid, liquid, and gas form
includes oceans, lakes, ice, groundwater, and clouds

12. Let’s Watch Again!

13. The Spheres of Earth
these four spheres overlap with one another

14. The Gaia Hypothesis
James Lovelock in the 1960’s proposed that Earth behaves like a living organism
used to promote a more caring attitude towards the Earth

15. Learning Goals We are learning the 4 spheres of the earth.
We are learning the interactions of the 4 spheres of the earth.

16. Homework
Read pages 29-31
Answer questions #1, 2, 4, 5 on page 31