Quiz on Rocks and Minerals

What is a mineral?

• Another name for a rock

• A chemical compound found in rocks

• A hard piece of material

• A type of salt

In science, what does the “texture” of a rock refer to?

• The way it feels

• Whether it is hard or crumbly

• Its colour

• The size and shape of its grains

Which description best fits a rock with interlocking crystals of three different minerals?

• Rounded grains of three different minerals

• Interlocking grains of two different minerals

• Interlocking crystals of three different minerals

• Rounded grains with gaps between them

Why are some rocks permeable?

• The rock dissolves in water

• Water can get into gaps between the grains

• Animals have dug burrows in the rock

• The rock is made of interlocking crystals

How are igneous rocks formed?

• Magma or lava is put under pressure

• Magma or lava cools down

• Magma or lava is heated up

• Magma or lava evaporates

When an igneous rock is forming, how does the cooling rate affect crystal size?

• Large crystals form if the magma heats up quickly

• Small crystals form if the magma cools slowly

• Large crystals form if the magma cools slowly

• Small crystals form if the magma evaporates quickly

According to the particle theory, under what condition will large crystals form?

• Lots of particles have time to bond into a regular pattern before the liquid cools

• The particles are kept as far apart as possible

• The particles have time to collect together before they melt

• The particles cool quickly and don’t have time to move apart

Metamorphic rocks are formed by the effects of which of the following?

• High pressures or low temperatures

• High pressures or high temperatures

• Low pressures or high temperatures

• Low pressures or low temperatures

Physical weathering happens most when the weather:

• Is always hot

• Keeps changing between hot and cold

• Is always cold

• Causes the rock to be struck by lightning

Freeze–thaw action damages rocks because:

• The rocks melt

• The rocks freeze

• Water expands when it thaws

• Water expands when it freezes