Science, Ch.7
Order by
34 terms
Terms | Definitions |
|---|---|
 Revolution | 365 1/4 days |
| Rotation | 24 hours |
| Gravity | What gives moving water its energy? |
| Because the earth rotates | Why do we have night and day? |
| Because the earth is tilted on its axis | Why do we have seasons? |
| North America | Contains the countries of the United States, Mexico, and Canada |
| South America | Contains the countries of Brazil, Chile, and Peru |
| Europe | Contains the countries of France, Germany, and Italy |
| Australia | the "Island Continent" |
| Asia | The largest continent |
| Africa | Contains the countries of Egypt and Nigeria |
| Antarctica | Contains the least amount of people (only researchers) |
| Limestone | Rock made from shells |
| Marble | Rock used to make the Lincoln Memorial and other monuments |
| Shale | Rock made from mud |
| Slate | Rock used to make blackboards |
| Granite | Rock that most of the earth's crust is made of |
| Conglomerate | Rock made from pebbles or cobbles cemented together |
| Pumice | Rock that can float |
| Obsidian | Rock used to make arrowheads |
| Erosion | The wearing away of the earth's topsoil |
| Delta | Shaped like a triangle |
| Sedimentary rock | Rock that is formed from the deposits made by moving water |
| Igneous rock | Rock made from hot, liquid rock or magma |
| Three | How many groups have geologists divided rocks into? |
| Mantle | It is made of hot, liquid rock |
| Core | The center of the earth |
| Clay | What holds the water in the soil? |
| Gems | Diamonds and rubies are ___________ |
| Mineral | A ___________ is never man-made |
| Humus | The decayed material in the soil. |
| Topsoil | Which layer of soil is more fertile? |
| 8,000 miles | The diameter of the earth |
| 25,000 miles | The circumference of the earth |
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