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Fill in the missing words : Rock, Temperature, Pressure, Freeze-Thaw, Onion- Skin, Acid Rain, Limestone, Plants, Animals, Expand, Weakens, Eroded, Transported, Wearing Away, Water, Ice, Wind

The Earth is made up of many different types of _ _ _ _. A landscape can be made up of more than one rock type.

Physical weathering is caused by changes in _ _ _ _ _ _ _ _ _ _ _ or _ _ _ _ _ _ _ _. There are 2 main types of physical weathering: _ _ _ _ _ _- _ _ _ _ (takes place when water is trapped in the cracks of rocks and freezes. The frozen water expands and enlarges the cracks in the rocks) and _ _ _ _ _- _ _ _ _ (takes place in hot desert climates. Changes in temperature cause the surfaces of the rocks to expand and contract which causes thin layers of rock to peel off!).

Chemical Weathering occurs when _ _ _ _ _ _ _ _ attack and break down rock surfaces. _ _ _ _ _ _ _ _ _ is weathered in this way.

Biological weathering involves _ _ _ _ _ _ and _ _ _ _ _ _ _ . Plant seeds can begin to grow in the cracks of the rocks. As the roots _ _ _ _ _ _ the cracks in the rock expand, the rock _ _ _ _ _ _ _ and pieces break off!

Once rocks have been broken down they may be _ _ _ _ _ _ and/or
_ _ _ _ _ _ _ _ _ _ _. Erosion is the _ _ _ _ _ _ _ _ _ _ _ of the land by _ _ _ _ _, _ _ _ or _ _ _ _.

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Rock, Temperature, Pressure, Freeze-Thaw, Onion- Skin, Acid Rain, Limestone, Plants, Animals, Expand, Weakens, Eroded, Transported, Wearing Away, Water, Ice, Wind

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