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Rocks that undergo pressure and heating without melting form what type of rock?

What is a rock made of sand?

What is weathering?

Layers of sediment getting compressed from the weight above and minerals dissolving in water and seeping between bits of sediment and gluing them together from what rock?

What is a rock made of fossils of organisms that live in the water?

Leaching is caused by what type of weathering?

Breaking rocks into smaller pieces without altering their chemical composition is what type of weathering?

When a chemical reacts with another chemical, a reaction and change occurs. This is what type of weathering?