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Sedimentary Rocks
Objectives
• Explain how sedimentary rocks are
formed
• Describe why we find fossils in
sedimentary rock
Key Words
• Weathering
• Sediments
• Transported
• deposit
Competition
•
•
•
•
Rock paper scissors
Can anything change rock??
What shapes a rock?
Look at some samples
Starter
• Draw a spider diagram of what causes
weathering
Sedimentary Rock
Sedimentation
Compaction
Cementation
• Examples: chalk, limestone, sandstone
and shale
How do Sedimentary Rocks Form?
1. Rocks can crumble to make small particles.
2. The particles are carried away by rivers or wind.
3. The particles settle in another place they form a layer.
4. Other layers are put on top of them.
5. The lower layers get pressed together.
6. Water is squeezed out. The minerals left in the
sedimentact like cement
7. The pressure and the mineral cement stick the
particles together.
8. The solid rock forms slowly.
Activity
• Cut and stick in order how sedimentary
rock is formed
How fossils form
Organism
Dies
Buried
Quickly
Minerals seep
into the bones.
The bones rot
away leaving rock
like minerals in
their place