| Question |
Answer |
| What is erosion? |
movement of rock particles by wind, water, ice, or gravity. |
| What is weathering? |
process that breaks down rock and other substances at Earth's surface. |
| What is mechanical weathering? |
type of weathering in which rock is physically broken into smaller pieces. |
| What are examples of mechanical weathering? |
heating and cooling, abrasion, and freezing and thawing. |
| What is abrasion? |
grinding away of rock by rock particles carried by water, ice, wind, and gravity. |
| What is ice wedging? |
wedges of ice in rocks widen and deepen the cracks. |
| What is chemical weathering? |
process of breaking down rocks through chemical changes. |
| What are examples of chemical weathering? |
water, oxygen, carbon dioxide, and acid rain. |
| What does permeable mean? |
material is full of tiny, connected air spaces that allows water to seep through. |
| Why is soil important? |
everything that lives on land depends directly or indirectly on it. |
| When did the Dust Bowl take place? |
the 1930s |
| Where did the Dust Bowl occur? |
the Great Plains |
| What was the Dust Bowl? |
plowing removed the grass from the Great Plains, exposing the soil. A drought lead to the topsoil drying out, which turned to dust and blew away. |
| What is soil conservation? |
managing the soil to prevent its destruction. |
| What is contour plowing? |
practice of plowing fields along the curves of a slope.
|
| What is conservation plowing? |
practice of disturbing the soil as little as possible, leaving dead weeds and stalks to return nutrients to the soil. |
MedTemCP5 Word+Pics
