What type of igneous rock forms when magma cools slowly underground?
Extrusive
Sedimentary
Intrusive
Which of the following is an example of an intrusive igneous rock?
Granite
Sandstone
Basalt
What happens to magma as it cools?
It evaporates
It melts further
It solidifies into rock
What does the word igneous mean?
Fire
Water
Earth
Where does intrusive igneous rock form?
On the Earth’s surface
Under the ocean only
Below the Earth’s surface
Which statement best describes igneous rocks?
They form from heat and pressure on other rocks
They form from layers of sediment
They form from molten rock
How are igneous rocks formed?
By erosion and weathering
By layers of sediment being pressed together
By cooling and solidifying of molten rock
Why are igneous rocks usually hard?
They are made of soil
They contain air spaces
Their crystals are tightly packed
Why does lava cool faster than magma?
It is exposed to air and water
It is deeper underground
It is under high pressure
Which type of igneous rock is formed inside volcanoes but below the surface?
Extrusive
Intrusive
Sedimentary
Why do extrusive igneous rocks usually have small crystals?
They are pressed by layers
They cool quickly at the surface
They cool slowly underground
What type of igneous rock forms when lava cools quickly on the Earth’s surface?
Metamorphic
Intrusive
Extrusive
Which process happens first in the formation of igneous rocks?
Cooling of magma or lava
Weathering of rock
Erosion by wind
Which of the following is an example of an extrusive igneous rock?
Marble
Granite
Basalt
What is one feature of intrusive igneous rocks?
Layers
Large crystals
Contains fossils
What is molten rock called when it is found below the Earth’s surface?
Magma
Rock
Lava
Which word describes the change from liquid magma to solid rock?
Condensation
Erosion
Solidification
What is one feature of extrusive igneous rocks?
Soft texture
Large layers
Small crystals
Which pair of words correctly matches the location and rock type?
Below surface – intrusive
Surface – sedimentary
Surface – metamorphic
What is molten rock called when it reaches the Earth’s surface?
Magma
Lava
Granite
Which material cools more slowly?
Lava on the surface
Magma underground
Sediment in water
Why do intrusive igneous rocks usually have large crystals?
They cool very fast
They are formed by layers
They cool slowly underground
Which process changes magma or lava into solid igneous rock?
Solidification
Erosion
Evaporation
What causes magma to turn into solid igneous rock?
Increase in pressure
Loss of heat
Weathering
Which statement about lava is correct?
It forms deep underground
It is magma that has reached the surface
It is already solid rock