Earth's Layers
What is the outer layer of the Earth called?
The crust
Areas of rounded land that are higher than the land around them are known as ____________.
hills
This is the sudden shaking of Earth's crust.
Earthquake
The process in which one type of rock can change into a different type of rock is known as the _________.
rock cycle
Pieces of broken rock are known as ___________.
sediment
The middle layer of the Earth is called ________.
The mantle
When a volcano erupts, this landform is formed.
Mountain
What can be the result of a sandstorm?
Dunes
What are the three types of rocks we learned about this year?
metamorphic, igneous, sedimentary
This is a broad area of wetland.
Delta
The hottest and deepest layer of the Earth is the _______.
What is a hole in the Earth filled with magma called?
A volcano
What caused the formation of the Grand Canyon?
Water Erosion
Rocks formed when heat and pressure change existing rocks into different rocks are ___________
metamorphic rocks
High areas of land with flat tops and steep sides are called _________.
What are cracks in the Earth's crust called?
Faults
Large, flat areas of land are known as _______.
plains
What are three ways to prevent erosion?
Retaining wall, dam, vegetation, sand dunes, etc.
These are rocks formed from layers of sediment that get buried, pressed, and cemented together over time.
Sedimentary rocks
The process that moves weathered rock from one place to another is called _______________.
erosion
This is the theory that explains the motion of the plates.
Plate Tectonics
What are low areas of land that appear between mountains or hills?
Valleys
The process of rocks breaking apart is called _______________.
weathering
Rocks that have cooled and hardened from melted rock are called _________.
Igneous rock
How do plants help prevent erosion of soil?
1) Act as a barrier
2) Roots hold the soil in place
3) Roots help to absorb the water