Download Rock cycle, true or false Questions

Rock cycle, true or false
Questions
1. The rock cycle is driven by the sun.
2. Lava can cool and solidify underground.
3. Layers of lava can be described as sedimentary rocks.
4. Granite is a metamorphic rock
5. Large crystals in an igneous rock mean that it cooled slowly.
6. Slate is a sedimentary rock often used on house roofs.
7. Weathering only affects sedimentary and igneous rocks.
8. Fossils can only be found in sedimentary rocks.
9. Compaction and cementation are two of the processes involved in changing eroded
sediments into rock.
10. Metamorphic rocks can undergo melting to become igneous rocks.
11. Sedimentary rocks may be porous.
12. Radioactive decay in the inner core creates all the heat deep inside the Earth.
13. Sediments undergo erosion, transportation and burial before becoming sedimentary rocks.
14. Lithification is the processes of lava cooling and solidifying to become igneous rock.
15. Limestone can be metamorphosed to marble.
16. Basalt is an igneous rock.
17. Metamorphic rocks are very easily eroded.
18. Examples of sedimentary rocks include sandstone, limestone, chalk and clay.
19. The rock cycle never stops.
20. Freeze-thaw is a form of physical weathering in the rock cycle.
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Rock cycle, true or false
Answers
1. False – The rock cycle is the result of an interaction between plate tectonics and the
hydrologic cycle.
2. False – Lava is extruded onto the surface. It is magma which solidifies underground.
3. False – Lava is an igneous rock and can form layers due to successive eruptions over the
same area. However, it is not composed of eroded sediments.
4. False – Granite is an intrusive igneous rock formed from cooled magma.
5. True – Large crystals indicate a slow rate of cooling.
6. False – Slate is a metamorphic rock rather than a sedimentary rock.
7. False – Weathering affects all rocks.
8. False – Fossils are destroyed in igneous rocks. They are most common in sedimentary
rocks and are frequently distorted when present in metamorphic rocks.
9. True – After deposition, the weathered and eroded mineral grains undergo compaction and
cementation to form sedimentary rock.
10. True – Metamorphic rocks can be melted to form magma that can become igneous rocks.
11. True – Sedimentary rocks may be porous, permeable or impermeable.
12. True – Radioactive decay in the inner core creates all the heat deep inside the Earth and is
responsible for the melting of magma.
13. True –Weathered and eroded sediments are transported and buried to form sedimentary
rocks.
14. False – Lithification is the process of loose sediments becoming a sedimentary rock.
15. True – Limestone can become marble through metamorphism.
16. True – Basalt is a lava erupted from volcanoes i.e. an igneous rock.
17. False – Metamorphic rocks are usually resistant to weathering and erosion and are
therefore very hard-wearing.
18. True - Sandstone, limestone, chalk and clay are all examples of sedimentary rocks.
19. True - The rock cycle never stops. Rocks are constantly being recycled.
20. True - Physical weathering is caused by physical changes such as temperature changes
including freeze-thaw activity.
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