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Slow Changes on Earth

Teacher: Mrs. Cremins
Across
The breaking down of rocks is called _______________.
Layers of soil with its own properties
_____________ ____________ occurs when wind and rain break rocks down. This causes the rocks to change size and shape._
This weak acid is made from a combination of carbon dioxide and rainwater. It causes chemical weathering of rocks, and is called _____________ _______.
As a tree's _________ grow, they can force their way through cracks in rocks and cause them to break apart.
Down
__________________________occurs when minerals in rocks are changed by oxygen, acids, or carbon dioxide.
This kind of physical weathering is caused by winds breaking down the softer parts of rocks. It is called _____________.
When water freezes, it takes up more space or _____________.
When the outer layers of rock peel off like layers of an onion we call this kind of physical weathering ______________.
Decayed plant or animal material is called _________.