EARTH SCIENCE MID TOPIC TEST REVISION
NAME: _________________________
DATE: ____________________
Layers of the Earth
1. Starting with the innermost layer and working your way out, list the four main layers of the earth.
2. What state (solid, liquid or gas) does the inner core exist in and why?
3. Which layer of the Earth is the thickest and how many kilometres thick is it?
Igneous rocks
4. What are all rocks made of?
5. How are igneous rocks formed?
6. What is the difference between an intrusive igneous rock and an extrusive igneous rock?
7. Name the hot molten rock that:
a. Pours out of volcanoes
b. Has not reached the surface
8. Pumice can be formed by lava cooling in water. Explain why igneous rocks such as this do not have any
visible crystals.
9. The grains in rocks can either be interlocking (crystals) or rounded. Rocks with rounded grains are often
porous. What does this mean?
10. Complete the table below:
Igneous Rock
Basalt
Use
Pumice
Dolerite
Sedimentary rocks
11. Name the three main types of sedimentary rocks.
12. What are the two processes that take place to form sedimentary rocks?
13. State the general characteristics of clastic sedimentary rocks.
14. List five sedimentary rocks and their uses.
15. What are the characteristics of organic sedimentary rocks?
Metamorphic rocks
16. How and from what are metamorphic rocks formed?
17. What are the general characteristics of metamorphic rocks?
18. Slate, marble and quartzite are all metamorphic rocks. State a use for each example and which kind
of rock each example was before undergoing metamorphosis.
The Rock Cycle:
19. Draw a diagram outlining the rock cycle.
20. What is the difference between weathering and erosion?
21. What are the agents of erosion?
22. Name two agents of physical weathering and two agents of chemical weathering.
23. What processes take place to turn igneous rocks into sedimentary rocks?