Types of Rocks
Name the three types of rocks.
1. Igneous rocks
2. Sedimentary rocks
3. Metamorphic rocks
Name the middle layer; the thickest layer of the Earth.
Mantle
State the term for the sudden shaking of the ground caused by movement in Earth’s crust.
Earthquakes
Metamorphic rocks can change into other types of rocks. State the types of rocks metamorphic rocks can become.
Igneous or Sedimentary
Rocks that are usually found near volcanoes and are formed from the cooling and hardening of hot magma or lava.
Igneous rocks
The hottest layer; made of solid iron and nickel
Inner core
Name the type of boundary formed when two plates are pushing towards each other.
Convergent boundary
Scientists use these as evidence that Earth was once one large supercontinent.
Fossils
A rock that has changed from one type of rock to another by heat or pressure; may also have a swirled look.
Metamorphic rock
Name the thinnest layer of Earth.
State the type of boundary formed when tectonic plates move away from each other.
Divergent boundary
State the three types of convergent boundaries.
1. Oceanic-oceanic
2. Oceanic-continental
3. Continental-continental
Identify the type of rock that limestone is.
Sedimentary rock
State the 4 main layers of the Earth
1. Crust
2. Mantle
3. Outer core
4. Inner core
Define transform boundary.
When two plates slide past each other in the same or opposite directions.
Millions of years ago, there was only one super continent. Name this continent.
Pangaea
State two examples of an igenous rock.
1. Obsidian
2. Pumice
3. Granite
This increases as the depth beneath the surface of the Earth increases.
Pressure
The slow movement of Earth's landmasses riding on continental and oceanic plates.
Continental drift
Explain why oceanic crust subducts beneath continental crust at a convergent boundary.
Oceanic crust subducts beneath continental crust because oceanic crust is denser than continental crust, so it is more likely to sink into the mantle.