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BILL NYE – “EROSION” BILL NYE – “EROSION” 1. Erosion is/is notcaused by water, ice, wind, chemicals, and sand 1. Erosion is/is notcaused by water, ice, wind, chemicals, and sand 2. The process of ____________ causes rocks on the Earth’s surface to 2. The process of ____________ causes rocks on the Earth’s surface to change, crumbling mountains and widening valleys. change, crumbling mountains and widening valleys. 3. When solids/ liquids are carried away by water, it is also considered a form 3. When solids/ liquids are carried away by water, it is also considered a form of erosion of erosion 4. When liquid water freezes in rock it ____________ and causes rocks to 4. When liquid water freezes in rock it ____________ and causes rocks to erode by cracking them. erode by cracking them. 5. When rain combines with iron in rock, it forms rust, which is a form of 5. When rain combines with iron in rock, it forms rust, which is a form of ____________ erosion ____________ erosion 6. When softer rock erodes faster than the harder rock above, sometimes 6. When softer rock erodes faster than the harder rock above, sometimes a(n) ___________ is formed a(n) ___________ is formed 7. Wind sometimes picks up sand/ boulders and blows them into rocks 7. Wind sometimes picks up sand/ boulders and blows them into rocks causing the rock to erode causing the rock to erode 8. Erosion is the slow wearing away of the earth’s __________________ 8. Erosion is the slow wearing away of the earth’s __________________ over millions of years over millions of years 9. When pebbles are hit by waves over thousands of years, a beach of 9. When pebbles are hit by waves over thousands of years, a beach of ________________ is formed ________________ is formed 10. Sand, ________________ and waves hit rocks and smooth out the 10. Sand, ________________ and waves hit rocks and smooth out the surface of older rocks surface of older rocks 11. ________________ can hold back soil from eroding and also break rocks 11. ________________ can hold back soil from eroding and also break rocks apart – causing erosion. apart – causing erosion. 12. Water flows into cracks of rocks and shrinks/ expands when it freezes 12. Water flows into cracks of rocks and shrinks/ expands when it freezes causing the rock to crack causing the rock to crack 13. As water flows over rocks, it dissolves minerals causing different 13. As water flows over rocks, it dissolves minerals causing different ____________________ to sometimes appear ____________________ to sometimes appear 14. Pounding water, wind, __________________ and rain are major causes 14. Pounding water, wind, __________________ and rain are major causes of erosion of erosion 15.____________________ in the air contribute to erosion. 15.____________________ in the air contribute to erosion