Show:
Minerals & Rocks
Types of Rocks
The Rock Cycle
Weathering
Erosion
100
How are minerals and rocks related?
Minerals are the substances that make up rocks.
100
This type of rock is formed from lava that cools and hardens.
An igneous rock.
100
True or False: The rock cycle happens within a couple of weeks.
False. It can take thousands or millions of years.
100
What is weathering?
The breaking down of rock over time.
100
What is erosion?
The moving of sediments from one place to another.
200
Name the 3 ways to tell minerals apart.
Luster, streak, and hardness.
200
This type of rock is formed from heat and pressure.
A metamorphic rock.
200
True or False: The rock cycle always goes in the same direction.
False.
200
Weathering usually involves what substance?
Water.
200
What are 3 ways erosion can happen?
Water, wind, and ice.
300
When you rub a rock on a plate and it leaves a colored powder behind, this is called ____?
The streak test.
300
When pieces of rock are pressed together into layers, what kind of rock does it form?
Sedimentary rocks.
300
Sedimentary rocks can be formed from which other types of rock? How?
Igneous or metamorphic - either type of rock can be broken down and carried away.
300
Just by looking at them, how can you tell if rocks have been weathered?
If the rocks have jagged edges, not much weathering has occured. If they're smooth, weathering has occured.
300
Water needs to be ________ for erosion to happen.
Moving/flowing.
400
When you describe the luster of a mineral, what are you describing?
How it reflects light/how shiny it is.
400
These two types of rocks involve heat.
Igneous and metamorphic rocks.
400
If a rock is pushed underground and EXTREME heat is applied to the rock, which rock will it probably form?
Igneous rock (the rock will melt).
400
Name 2 different ways weathering can occur.
Rust, waves on a shoreline, plants, wind, animals, etc.
400
Where does wind erosion often happen?
In the desert.
500
When you test the hardness of a mineral, you test how easily it can be _____?
Scratched.
500
Which two types of rocks involve pressure?
Sedimentary and metamorphic rocks.
500
Igneous rocks form from sedimentary rocks and metamorphic rocks by melting and cooling or pressure and heat?
Melting and cooling.
500
How is a sinkhole formed?
Water gets into the ground and weathers away the rock underneath. The surface, which is no longer supported, sinks.
500
What large pieces of ice helped form the plains and lakes?
Glaciers.