Weathering Crossword

______________ is the process by which other chemicals combine with oxygen.
The process by which rock is broken down into smaller pieces is called _____________ changes.
Physical weathering can be caused by _________________ changes.
In moving ___________, rock can become smooth and round.
______________ is the breaking down and wearing away of rock material by the mechanical action of other rock.
Rocks can be broken down in a _________________.
________ ______________ causes rocks to break down and change composition.
_____________ is a physical weathering that can cause abrasion by chemicals.
______________ weathering is the breakdown of rocks by chemical reactions.
_________________ is the process by which outer layers of rock slowly peel away due to pressure changes.
______________ is another form of physical weathering that can cause abrasion of other rocks.
The breakdown of rock material by physical and chemical process is called _______________.
_____ ______________ causes cracks in rocks to expand as water seeps in and freezes.