1. Genre: Nonfiction

2. As a kid, Simon loved animals and was a huge fan of science fiction magazines. That led to an interest in astronomy and technology, and then many other kinds of science as well.

4. cinders Cinders are left after a volcano erupts.

5. crater A crater can be filled with water.

6. crust The earth’s crust sits on top of the mantle.

7. eruption A volcanic eruption can be made of lava or ash.

8. magma magma > Magma is molten rock inside a volcano.

9. lava Lava is magma that comes out of a volcano.

10. molten Molten rock flows red-hot!

11. summit Cotopaxi in Ecuador 2 nd highest active volcano They reached the summit.

13. century 100 Years Fifth graders were born in the 20 th century.

14. Norse Norse refers to Ancient Scandinavia which includes Denmark, Norway, and Sweden.

15. advancing The lava flow was advancing down the side of the volcano.

16. weathered The wood was weathered by wind and rain.

17. weathered The car and the cabin weathered the storm.

18. billowy Billowy clouds of ash fill the air above the volcano.

19. composite Composite volcanoes are cone-shaped mountains with steep sides.

20. extinct Some volcanoes and all dinosaurs are extinct.

21. collapsed This barn was so old that it collapsed.

22. caldera The city of Santorini, Greece is perched above a huge caldera.

24. lava crust century summit extinct advancing

25. cinders billowy magma collapsed eruption Norse

26. weathered crater composite molten caldera

27. Click on this sentence to take a quiz about volcanoes.