Lesson 1 Conserving Land and Soil
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Litter | The very top layer of fertile soil made of dad leaves and grass
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| Topsoil | The crumbly, topmost layer of soil made up of clay and other minerals and humus (nutrients and decaying plant and animal matter)
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| Subsoil | the layer of soil below topsoil that has less plant and animal matter than topsoil and contains mostly clay and other minerals
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| Bedrock | Rock that makes up Earth's crust; also the solid rock layer beneath the soil
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| Erosion | The process by which water, ice, wind, or gravity moves weathered particles of rock and soil
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| Nutrient Depletion | The situation that arises when more soil nutrients are used than the decomposeres can spply
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| Fertilizer | A substance that provides nutrients to help crops grow better
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| Desertification | The advance of desert-like conditions into areas that previously were fertile; caused by over farming, overgrazing, drought, and climate change
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| Drought | A long period of low precipitation
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| Land Reclamation | The process of restoring land to a more natural, productive state
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
dguilliams
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