1. Volcano Vocabulary
F3 7th grade

2. A weak spot in the crust where magma has come to the surface
Volcano
A weak spot in the crust where magma has come to the surface

3. Volcano

4. Volcanoes are what formed the Hawaiian Islands.

5. Magma
The molten mixture of rock-forming substances, gases, and water from the mantle

6. Magma
Magma

7. Magma is found inside the volcano.

8. Lava
Liquid magma that reaches the surface; also the rock formed when liquid lava hardens

9. Lava

10. Lava is found outside the volcano.

11. A substance that cannot be broken down into other substances
Element
A substance that cannot be broken down into other substances

12. Element

13. Basalt is made up of the elements silicon and oxygen.

14. A substance in which two or more elements are chemically joined
Compound
A substance in which two or more elements are chemically joined

15. Compound

16. SiO2 is the compound formula for Silicon dioxide.

17. Cinder cone
A steep cone-shaped hill or small mountain made of volcanic ash, cinders, and bombs piled up around a volcano’s opening

18. Cinder cone

19. A cinder cone volcano has a steep, cone-shaped hill or small mountain.

20. Shield Volcano
A wide, gently sloping mountain made of layers of lava and formed by quiet eruptions

21. Shield Volcano

22. Shield Volcano
Shield volcanoes rose from a hot spot on the ocean floor to create the Hawaiian Islands.

23. Composite Volcano
A tall, cone-shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials

24. Composite Volcano

25. Composite Volcano
Mount St. Helens in Washington State is an example of a composite volcano.

26. Pipe
A long tube through which magma moves from the magma chamber to Earth’s surface

27. Pipe
Pipe

28. The pipe connects the magma to the vent.

29. The opening through which molten rock and gas leave a volcano
Vent
The opening through which molten rock and gas leave a volcano

30. Vent

31. Vent
Most often the vent is at the top of the volcano but sometimes there can be side vents.