WorksheetsFormation of Rocks
Total questions: 10
Worksheet time: 20mins
Which of the following is NOT true about the role tectonic forces play in the rock cycle?
When plates pull apart, rocks melt, and magma forms igneous rock
When plates crash together, rocks are buried and form metamorphic rocks
When plates slide over and under each other, the heat and pressure forms igneous rocks
When rocks push upward and form mountains, the erosion of the mountains can produce sediment
Which statement CORRECTLY describes the rock cycle?
Igneous rock can only form by heat and pressure
Metamorphic rock can only form by crystallization
Magma can only form by compaction and cementation
Sediment can only form by weathering, erosion, and deposition
Water can break down some minerals in a rock, changing them into NEW substances. This process is an example of
mechanical weathering
chemical weathering
The process by which oxygen reacts with iron minerals in rock to form rust is called:
carbonation
oxidation
solution
crystallization
Which of the following is an example of chemical weathering?
Water freezes in cracks in a rock, breaking the rock apart
Weak acid breaks down minerals by reacting with them
Plant roots grow and split rock into pieces
An animal kicks a rock down a hill where it hits another rock and shatters
Which of the following is NOT an example of mechanical weathering?
A growing plan root splits a rock
A bear kicks a rock over a ledge, causing it to break
Frozen water in rock cracks breaks the rock apart
Iron minerals in rocks turn brown and crumble
A chief cause of the formation of metamorphic rock is
weather
radiation from the sun
Earth's motion
plate motion
For sedimentary or metamorphic rock to become an igneous rock, it must first_____________.
Melt
Weather
Erode
Freeze
When rocks are broken down into small pieces, like sand and gravel, the pieces are known as ___________________.
magma
sediment
peat
debris
Why do metamorphic rocks rarely contain fossils?
These rocks are formed underwater, and the water dissolves the fossils
The rock formation occurs from extremely hot magma deep inside the crust where organisms do not live
These rocks undergo extremely high pressure or temperature changes when formed, which would destroy fossils
These are usually formed from extremely hot magma or with severe lava explosions, which would destroy fossils
