Checkpoint 1 - Chemistry 8.4 Sedimentary rocks

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Why is limestone often white?

Because the grains are made up of calcium carbonate

How can you tell if rocks are sedimentary?

The rock has layers, it contains fossils, the rock is porous

How is sandstone formed?

Grains of sand are pressed together

How is sedimentary rock formed?

Layers of sediment collect on the sea and the weight of new sediment presses down on old sediment layers

What is sediment?

Little fragments of rocks

How is limestone formed?

Little fragments of shells are pressed together

What are sedimentary rocks made up of?

Little grains of sediment that are stuck together

Give two examples of sedimentary rock.

Sandstone and limestone

What happens when the remains of dead plants and animals fall into the sediment?

They become part of the rock and form fossils

What does it mean if a rock is porous?

Water can soak in through the the gaps between the grains of particles that are stuck together


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