8th Grade: What Do You Know About Earth Science?
The countryside around us, including the built environment, is often influenced by what lies underneath our feet - the rocks. Rocks form the Earth's crust and belong to one of three main groups - sedimentary, igneous and metamorphic. Their formation is linked by the rock cycle.
- 1.
Which of the following statements is incorrect?- A.
Igneous rocks are made from grains of other rocks that have been cemented together
- B.
Sedimentary rocks normally form in layers
- C.
Both metamorphic and sedimentary rocks can contain visible layers
- D.
Igneous and metamorphic rocks often contain crystals
- 2.
Which of the following is the correct sequence that describes the formation of a sedimentary rock?
- A.
Suspension, deposition, compaction, cementation
- B.
Sedimentation, deposition, cementation, compaction
- C.
Suspension, compaction, cementation, deposition
- D.
Deposition, cementation, sedimentation, suspension
- 3.
Which of the following statements is NOT true?
- A.
Sedimentary rocks are usually formed under water
- B.
Metamorphic rocks have been melted
- C.
Igneous rocks are often associated with volcanoes
- D.
Metamorphic rocks can be made from igneous, sedimentary or other metamorphic rocks
- 4.
Which type of rock is made from molten magma that has cooled down and solidified?
- A.
Igneous
- B.
Metamorphic
- C.
Sedimentary
- D.
All three
- 5.
In a sequence of sedimentary rock layers, where would you find the most recently formed rock?
- A.
It would be the lowest layer
- B.
It would be the middle layer
- C.
It would be the topmost layer
- D.
It is impossible to tell without carbon dating the rocks
- 6.
At which type of plate boundaries are you most likely to find igneous rocks forming?
- A.
Conservative and destructive
- B.
Destructive and constructive
- C.
Constructive and conservative
- D.
They will form at all three types of plate boundary
- 7.
Which word describes an ingneous rock that is formed deep within the crust of the Earth?
- A.
Extrusive
- B.
Intrusive
- C.
Extra-terrestrial
- D.
Intra-terrestrial
- 8.
Which rock type is formed by high pressures and temperatures?
- A.
Igneous
- B.
Metamorphic
- C.
Sedimentary
- D.
All three
- 9.
The timescale of the rock cycle is:
- A.
Months
- B.
Decades
- C.
Millenia (a millenium is one thousand years)
- D.
Millions of years
- 10.
Which of the following is NOT a type of weathering?
- A.
Saltation
- B.
Solution
- C.
Freeze-thaw
- D.
Exfoliation
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