Erosion
What is the definition of erosion?
The breaking down of rocks by wind, water, or other natural methods.
What is physical weathering?
When rocks break down into smaller pieces due to breaking and banging into each other.
A category of rock that forms when melted rock (magma or lava) hardens. (p.195)
What is igneous rock?
What are the three types of rock?
What is the definition of glacier?
A giant body of ice that slowly flows
Is the process of erosion a fast or slow process?
When rocks are under the process of physical weathering, they may break down into these, such as quartz or feldspar (p.21)
What are minerals?
A category of rock that forms when layers of sediments get stuck together. (p.197)
What is sedimentary rock?
What is a transformation that changes one type of rock into another?
What is the rock cycle?
What is the definition of mechanical weathering?
When rocks break apart without losing their chemical composition
What caused the Grand Canyon to to become a canyon? (Erosion is not the answer, what specifically caused it?)
What is the Colorado River?
When water seeps into cracks in rocks, freezes, and causes the rock to shatter or fall apart.
What is ice wedging?
A category of rock that has changed from another rock because of heat, pressure, or a chemical reaction. (p.196)
What is metamorphic rock?
What makes the stripes on the walls of the Grand Canyon?
They are formed by distinct layers of sedimentary rocks.
What is the definition of chemical weathering?
When rocks react to chemicals in the air, water, or soil, changing their composition
What are two things that cause erosion?
Can be: wind, water, ice, gravity, etc.
When rocks break off of the side of a cliff, they form these. (p. 22)
What are rock falls?
This category of rocks contains fossils within them.
What are sedimentary rocks?
What do the different layers of sedimentary rocks in the Grand Canyon represent?
They represent different periods of geologic time.
What is the definition of abrasion?
The grinding and bumping of rocks that cause physical weathering.
How do glaciers change land formations?
They erode the land beneath them as they grow and recede, causing lakes, valleys, and others.
If you were to put a drop of acid onto a rock such as limestone, it would cause the rock to fizz. If this were to happen over a long period of time, what kind of weathering would it be?
What is chemical weathering?
Where are the oldest rock layers of Earth located?
The deepest parts of Earth's crust.
What kinds of rocks are in the Grand Canyon?
FOR BONUS POINTS: Where are these rocks specifically located?
All three categories; metamorphic, igneous, and sedimentary.
FOR BONUS POINTS: Metamorphic and igneous rocks are located towards the lowest layers of the Grand Canyon, with sedimentary in the middle and top.
What is the definition of erosion?
The carrying away of weathered materials by water, wind, or ice.