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8 Rocks

Rocks and weathering keywords

QuestionAnswer
Pieces of a mineral with sharp edges. crystals
Tiny, rounded piece of rock. grain
When crystals fit together with no gaps between them. interlocking
The chemicals that rocks are made from. minerals
Two or more different kinds of mineral that are not chemically joined to each other. mixture
Porous rocks can soak up water. porous
The scientific word used to describe the shapes and sizes of the crystals or grains in a rock. texture
When rocks are broken up or worn away by chemical reactions, usually with rainwater. chemical weathering
Rocks that have been worn away or broken up by chemical, biological or physical processes. weathered
When rocks are worn away or broken up due to the activities of living things. biological weathering
Get smaller. contract
The movement of loose and weathered rock. erosion
Get bigger. expand
A type of physical weathering that happens when water gets into a crack in a rock and freezes. freeze–thaw action
A change that does not involve new chemicals. Melting and freezing are examples. physical change
When rocks are worn away or broken up by physical processes such as changes in temperature. physical weathering
When rock fragments bump into each other and wear away. abrasion
When moving water drops rock fragments or grains. deposits
Rock grains and fragments dropped on the bottom of a river, lake or sea. Fossil fuel formed from the remains of dead plants and animals that lived in the sea.sediment
The movement of rock grains and fragments by wind or water. transport
A fossil fuel made from the remains of plants. coal
Any sign of past life that has been preserved in a rock. fossils
Fossil fuel formed from the remains of dead plants and animals that lived in the sea. natural gas
Fossil fuel formed from the remains of dead plants and animals that lived in the sea. oil
Chemicals from rocks that have dissolved in water. salts
Created by: grovebiol
 

 



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