Weathering Crossword Puzzle

QUESTIONS LIST:

• ice wedging : causes cracks in rocks to expand as water seeps in and freezes
• abrasion : breaking down of rock and wearing away of rock by the action of other rock
• weathering : process by which rock is broken down in smaller pieces
• rust : red color of rock and soil caused my acid rain
• animal action : weathering caused by holes being dug to expose underlying rock
• oxidation : causes rust to from with iron in rock
• stalactites : caused by seeping ground water into caves
• plant growth : happens when a small seed grows over time to split a rock
• physical : type of weathering caused by temperature change, pressure change, water, wind
• lichens : produces acids and grows on rocks and trees