| A | B |
|---|
| How is water essential to agriculture and industry? | for growing crops, as a coolant and lubricant for machines, as a source of power, for shipping |
| Explain the Hydrologic cycle. | Evaporation, with cooling causes condensation, then causes precipitation, which evaporates again starting the cycle again |
| What are the characteristics of water? | transported & stored anywhere, can dissolve rock & mineral matter, can moderate temperature |
| What environmental benefits are provided by rivers? | water for agriculture, electricity, transportation, and cities |
| What environmental benefits are provided by estuaries? | rich in fish and shellfish |
| What environmental benefits are provided by lakes? | a place for recreation, water for the water supply, and source of fish |
| What environmental benefits are provided by wetlands? | home to large populations of fish and other wildlife and source of productive land |
| Why is groundwater important in dry climates? | surface water is scarce, can get water by drilling |
| Why does the Arctic Ocean freeze but the Pacific does not? | it is smaller and at a higher latitude |
| How is hydroelectricity produced? | water stored behind dams drives engines that produce electricity |
| What are headwaters? | first streams to form from precipitation on hills and mountains |
| What are tributaries? | small streams that join larger streams |
| What is a watershed? | a drainage basin or an area of land that is drained by a river |
| Why are rivers and estuaries important to ocean life? | carry mineral nutrients that are essential to marine life |
| How are the global oceans divided? | Pacific, Atlantic, Indian, Arctic |
