1. EARTH
Third Rock From
The Sun

2. BIG IDEA
Earth has 3 layers. Under the surface, rock is hot enough to become soft. When soft rock rises toward the surface, it can move the plates that make up the Earth’s outermost layer. When plates move, continents and oceans move, and earthquakes and volcanoes can form.

3. EARTH’S 3 MAIN LAYERS

4. MOVING TECTONIC PLATES

5. EARTHQUAKES

6. EARTHQUAKES

7. EARTHQUAKES

8. EARTHQUAKES

9. VOLCANOES

10. VOLCANOES

11. VOLCANOES

12. VOLCANOES

13. VOLCANOES

14. KEY CONCEPTS
Crust- The outer layer of Earth that is made from several large pieces called tectonic plates.

15. KEY CONCEPTS
Mantle- The middle layer of Earth. It is warm and about 60 miles below the crust.

16. KEY CONCEPTS
Core- The center layer of Earth. It is very hot!

17. HISTORY OF EARTH
Earth forms ap-proximately 4.6 billion years ago in what has come to be known as the “big bang” theory.

18. HISTORY OF EARTH
The oldest rocks known are formed 4 billion years ago.

19. HISTORY OF EARTH
First evidence of living organisms appears in rocks (fossils.) 600 million years ago.

20. HISTORY OF EARTH
Atlantic Ocean starts opening; Appalachian Mountains begin to form.

21. HISTORY OF EARTH
Dinosaurs die out 65 million years ago.

22. HISTORY OF EARTH
Himalayan Mountains begin forming 45 million years ago.

23. HISTORY OF EARTH
The Hawaiian Islands begin forming 5 million years ago.

24. HISTORY OF EARTH
The Great Ice Age begins 1.6 million years ago.

25. HISTORY OF EARTH
The Great Lakes form 8,000 years ago.

26. PLATE TECTONICS
Plate Tectonics- The science of how Earth’s crust plates move and their effect on the planet.

27. PLATE TECTONICS

28. RING OF FIRE

29. RING OF FIRE