Earth's Structure
What is the outermost layer of Earth?
The crust
What is weathering?
When a rock is slowly broken down over time.
What is an example of physical weathering?
waves pushing against rocks over a long period of time
Igneous, sedimentary or metamorphic.
What is the rock cycle?
Shows how one type of rock changes into another.
Which layer is below the crust?
The mantle
What is erosion?
When sediment is carried away.
What is an example of chemical weathering?
Acid rain dissolving the calcite in a statue.
How are igneous rocks formed?
The cooling down of magma.
A metamorphic rock can change into an igneous rock. True or false?
True.
Which layer of Earth is the hottest?
The inner core
What is deposition?
When sediment is deposited in a new location.
What are the agents of erosion? (what causes erosion)
water, wind, ice, gravity
How are metamorphic rocks formed?
A rock is exposed to high heat and pressure.
Exposure to high heat and pressure.
Which layer of Earth is the thickest?
The mantle
What are the 2 types of weathering?
Physical and chemical
What is an example of deposition?
A stream of water carrying sediment and dropping particles along the way as the water slows down.
Intrusive igneous rocks form underground, extrusive igneous rocks form on the surface.
How might an igneous rock become a sedimentary rock?
Weathering breaks it down into sediment, compacts and cements into sedimentary rock.
The mantle is made mostly of which 3 metals?
Iron, magnesium and silicon
Explain how weathering, erosion and/or deposition can affect the landscape.
Explain the relationship between weathering, erosion and deposition.
Weathering breaks down rock to produce sediment, erosion carries the sediment away, and deposition deposits the sediment in a new location.
What is the difference between a clastic sedimentary rock and an organic sedimentary rock?
Clastic sedimentary rocks are formed by the compaction and cementation of rock fragments, organic sedimentary rocks are formed by the accumulation of animal or plant debris.
How might a metamorphic rock become an igneous rock?
Melt into magma due to very high temperature, then cool.