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Unit 2B EXAM
Exam Review for Unit 2B
| Question | Answer |
|---|---|
| How can decomposers add to the value of soil? | Decomposers such as earthworms break down and digest organic matter to create humus which increases the fertility of soil. |
| What happens to rocks that are exposed on Earth's surface? | They are subjected to erosion and weathering. |
| How does wind cause erosion? | Through the process of deflation. (i.e. blowing stuff away;) |
| What type of landform contains still or standing water? | Lakes and/or Ponds |
| What is chemical weathering? | Chemical weathering is an erosion process that changes the composition of a rock. |
| What kind of map would show an area's elevation, relief, and landforms? | A topographical map |
| What is physical/mechanical weathering? | Physical or mechanical weathering is an erosion process that breaks down solid rock. |
| What is the mid-ocean ridge? | A continuous underwater mountain range that encircles the Earth. |
| What is frost wedging? | Frost wedging is an erosion process that breaks rocks apart by the constant freezing, thawing, refreezing, thawing cycle. |
| Why do modern GPS systems use signals from a network of satellites? | To pinpoint your latitude and longitude. |
| How are sand dunes created? | Wind picks up sand in one location and carries it to another location where it hits an obstacle and deposits the sand. |
| What is it called when a farmer uses the leftover crops and stalks from last year and plows them into his field? | This is called conservation plowing. |
| How is conservation plowing useful? | It returns soil nutrients, retains moisture, and holds soil in place. |
| How is contour plowing useful? | It helps to minimize erosion of soil, by slowing the runoff of rain water. |
| What is plucking? | When a glacier melts and refreezes picking up rocks and dragging them along. |
| How can a farmer prevent the loss of nutrients caused by planting the same crop year after year? | By the process of crop rotation. |
| What is the cause of creep? | The cycle of freezing and thawing and refreezing water beneath the soil. |
| How can sand dunes 'move'? | The wind shifts from one direction to another forming sand dunes of varied shapes and sizes. |
| What is a meander? | A big loop shape of a river. |
| Which soil horizon contains the most humus? | The topsoil or the A horizon. |
| What does groundwater form in a cavern and how? | Stalactites and stalagmites, through the process of erosion and deposition. |
| How do rocks get 'rounded'? | By the constant abrasion of erosion, chipping and wearing away tiny fragments of the rock. |
Created by:
scanto
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