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Science Quiz
just study
| Question | Answer |
|---|---|
| What is evidence? | unbiased data gathered by direct observation |
| What is soil? | portion of earth's surface of rock and humus which helps plants grow |
| What is composition? | specific ingredients- general make-up of a material |
| What is weathering? | wearing down of rocks by natural processes |
| What is decomposing? | break down or decay living material |
| What is organic matter? | material living organisms: plants, animals, leaves |
| What are nutrients? | dissolve in water and are all absorbed by roots and is a certain |
| What is humus? | rich topsoil that forms after decomposition, a good loom soil with 40% silt, 40% sand, and 20% clay |
| What is fertilizer? | substance that supplies the soil with missing nutrients |
| What is a native plant? | a plant that grows or lives in a particular region without direct or indirect human intervention |
| What is contour plowing? | used on hills; plow across the hill, NOT UP AND DOWN; slows down water flow so less soil is washed away |
| What are tree lines? | lots of trees planted to form a windbreak; slows down wind so it can't lift up soil and move it |
| What is crop rotation? | changing type of crop planted in same location each year; reduces loss of same type of nutrients in the soil |
| What are native PLANTS? | grasses and trees native to the area soil are best adapted to the environment; grow well and roots reduce erosion |
| What is control? | standard to which experimental results can be compared |
| What are the 3 main components of soil? | silt, clay, and soil |
| What is the order, in greatest to least: the components of soil? | sand, silt, clay |
| What are the individual pieces of sand called? | grains |
| Can you see clay particles? | No, you need a microscope to see them. |
| Different soils from different places have _________________ amounts of each of the above | different |
| What are all of the layers of soils? | subsoil, bedrock, topsoil, parent material |
| What are the layers of soil in order? | topsoil, subsoil, parent material, bedrock |
| Why do we need organic matter? | We need it because bacteria and other microrganisms help break down and it eventually turns the chemicals into nutrients and nutrient help the soil. |
| What was the Dust Bowl? | The Dust Bowl was 1930's natural disaster affecting many central states, removing soil, and depleted nutrients and water. |
Created by:
42josie
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