1. 4th Grade Science Test will be Friday 26 August
You will be able to use your
Science Notebooks!

2. 1. Why are some volcanoes cone-shaped and some shield-shaped?

3. Cone-shaped volcanoes have thick lava that oozes out slowly
Cone-shaped volcanoes have thick lava that oozes out slowly. Shield-shaped volcanoes have lava that is thin and runny.

4. 2. If you were traveling and found a volcano, how could you figure out if the volcano makes felsite or basalt lava?

5. Volcano shield + dark rock=basalt lava
Volcano shield + dark rock=basalt lava. Volcano cone + light rock=felsite lava.

6. 3. Which volcanoes are more likely to explode, the ones with thick lava or thin lava?

7. Volcanoes with thick lava trap gas bubbles
Volcanoes with thick lava trap gas bubbles. Gas makes the volcano explode.

8. 4. cone shaped volcano- formed in the shape of a hill because of thick, slow moving lava

9. 5. shield shaped volcano- has thin, runny lava, so it spreads out more

10. 6. felsite lava -comes from cone volcanoes and its rock is light in color

11. 7. balsite lava rock- comes from shield volcanoes and its rock is dark in color

12. 8. magma- molten rock under the Earth’s surface

13. 9. fault- a break in the Earth’s surface

14. 10. lava- molten rock that flows out of a vent to arrive at the Earth’s surface