Rocks
What is a rock?
A nonliving piece of Earth
What is a Mineral?
A hard nonliving piece of Soil
What is weathering?
Any action that causes a rock to break into small pieces
What is Erosion?
Any action that moves a rock to a different place on earth
What is Soil?
A mix of tiny rocks and dead plants
True or False: Rocks can be found at the bottom of the ocean
True!
True or False: Minerals are only 1 color
False! Minerals can have lots of different colors
What is physical weathering?
Weathering caused by Ice, Wind, Rain, or Humans
What does the word Deposition mean?
When rocks and minerals are dropped in a new location
When an animal/plant dies and starts to breakdown and become part of the soil. What is this called?
Decomposition
What did people use Rocks as 100 years ago?
Tools
Building Materials
Chalk
How do we sort Minerals?
Color, Luster, Hardness, and Mohs Scale
What is Chemical Weathering?
Weathering caused by acid rain mixing with the Minerals in rocks
Water, Wind, Ice, and Humans
What does the word Decompose mean?
When something dies and breaks down into the soil
Can a Rock be softer than your finger nail?
YES! Gypsum is softer than a fingernail
What is the Mohs Scale?
It compares the hardness of a rock
How can Waves weather a large rock?
It breaks off tiny pieces of the rock
What happens when the wind picks up sand from the desert and Erodes it?
It moves it to a different place
What is the top layer of soil called?
Topsoil
What is one way we can sort our rocks into groups?
Color
Size
Luster
Can rocks scratch other minerals?
Yes! Some rocks are hard and some rocks are soft
Does weathering happen really fast or really slow?
BOTH
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What is the bottom layer of soil called?
Subsoil