8H Quick Quiz
1 Which of these is an example of a sedimentary rock?
2 Which of these sentences best describes a characteristic of all sedimentary rocks?
A They are porous.
B They never contain fossils.
C They are very smooth.
D They taste sweet.
3 Which sentence best describes the pressure on different layers of rock?
A The pressure will be greatest on the youngest layer of rock.
B The pressure will be greatest on the oldest layer of rock.
C The pressure will be greatest on the middle layer of rock.
D The pressure will be greatest on the highest layer of rock.
4 Sedimentary rock is formed as grains of rock which get fixed together by:
A compaction and cementation.
B squeezing the dry rock grains together.
C adding clay particles.
D adding water to the mixture.
1 Rocks are:
A solutions of minerals.
B compounds of minerals.
C mixtures of minerals.
2 The word ‘limestone’ refers to:
A rocks which all contain sand.
B rocks which are mainly made of calcium carbonate.
C hard parts found inside certain green fruits.
D rocks that do not contain calcium carbonate.
3 Limestones can have different textures because:
A they contain slightly different minerals.
B some of them have been weathered.
C they are made from rock.
D they are made in different factories.
4 Limestones are carbonate-rich. This means that they:
A are very expensive.
B contain a lot of carbonate compounds.
C are attracted to carbonate compounds.
D react with carbonate compounds.
1 The word metamorphic means:
2 Which of the following statements is true?
A Marble is formed from limestone.
B Marble is not a metamorphic rock.
C Slate is formed from granite.
D Gneiss is formed from marble.
3 Which statement describes some of the ways in which metamorphic rocks are different from sedimentary rocks?
A Metamorphic rocks do not contain crystals and are very porous.
B Metamorphic rocks are softer, more porous and have large grains.
C Metamorphic rocks may be harder, less porous and have crystals which may be lined up.
D Metamorphic rocks are softer, less porous and may contain clear fossils.
4 Metamorphic rocks are formed by the effects of:
A the high pressure and low temperature inside the Earth.
B the high pressure and high temperature inside the Earth.
C the low pressure and high temperature inside the Earth.
D the low pressure and low temperature inside the Earth.
1 Which of the following is an igneous rock?
2 Igneous rocks are formed when:
A magma or lava is put under pressure.
B magma or lava cools down.
C magma or lava is heated up.
D magma or lava evaporate.
3 When an igneous rock is forming:
A large crystals will form if the magma heats up quickly.
B small crystals will form if the magma cools slowly.
C large crystals will form if the magma cools slowly.
D small crystals will form if the magma evaporates quickly.
4 According to the particle theory, large crystals will form if:
A the particles have time to collect together before they cool.
B the particles are kept as far apart as possible.
C the particles have time to collect together before they melt.
D the particles cool quickly and don’t have time to move apart.
1 Which of these sentences about the rocks of the Earth is true?
A The rocks have been exactly the same since it was formed.
B The rocks changed when the rock cycle started 10 000 years ago.
C The rocks have always been changing very quickly.
D The rocks have always been changing very slowly.
2 Which of the following is not part of the rock cycle?
C rocks getting buried underground
D volcanoes erupting
3 Evidence that rocks melt during the rock cycle comes from:
A scientists who think rocks are liquids.
B observations of erupting volcanoes.
C experiments to heat lumps of rock.
D observation of lumps of sedimentary rock.
4 Rocks are weathered by:
A physical processes only.
B chemical and physical processes only.
C biological processes only.
D biological, chemical and physical processes.