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Water 1
6th Grade Science: Unit 4 - Water Cycle
| Question | Answer |
|---|---|
| Atmospheric Conditions | Atmospheric condition refers to the state of the atmosphere in terms of temperature and wind and clouds and precipitation. |
| Evaporation | Heat evaporateswater into water vapor (gaseous state). Water vapormolecules fit intospaces among the molecules thatmake up air. |
| Humidity | The amount of water vapor present in the air |
| How does temperature affect evaporation? | Higher temperatures mean more evaporation |
| What atmospheric condition occurs due to evaporation? | More evaporation means more water vapor in the air (higher humidity). |
| Condensation | At cooler temperatures water vapor molecules slow down and form droplets of liquid water. The air is saturated (holding as much water vapor as it can). |
| Dew Point | the temperature at which air is saturated and condensation forms. |
| When does condensation occur? | Condensation can occur whenever air becomes saturated (holding as much water vapor as it can). |
| When does fog occur? | When water vapor molecules suspended in the atmosphere at or near the earth's surface cool and condense, fog can occur (a cloud next to the surface) |
| When does dew form? When does frost occur? | Dew forms when water droplets condense from the air, usually at night, onto cool surfaces near the ground. Frost may form when temperatures are near 0°C. |
| When does precipitation occur? | When liquid water droplets combine and grow too large for the atmosphere to support their weight, the droplets fall. |
| Name the types of precipitation and when they occur. | Rain - Water falling in temperatures above freezing Sleet - Falling water passes through a layer of freezing air near earth’s surface Snow - Water falling in air temperature so cold that water vapor changes to a solid Hail - Water freezes inside a cloud before it falls |
| How does atmospheric conditions affect precipitation? | Temperature determines what type of precipitation (rain, sleet, snow, hail) |
| Water Cycle | the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration. |
| Precipitation | Precipitation is water released from clouds in the form of rain, freezing rain, sleet, snow, or hail. Precipitation is the main way atmospheric water returns to the surface of the Earth. |
| Infiltration | Infiltration is the process of water being absorbed into the ground. Water starts as precipitation, when it hits the ground, it must land in a porous area. This is a soil that has enough air space around the individual grains of soil for water to work its way between them and fill the open spaces. |
| Aquifer | An aquifer is a body of rocks or sediment underground that holds water |
| Evaporation | the process that changes liquid water to gaseous water (water vapor) |
| Freshwater | water containing less than 1,000 milligrams per liter of dissolved solids, most often salt. |
| Groundwater | water that is stored underground within the saturated zone of soil and rock, filling the spaces between particles and cracks, and replenished by precipitation that infiltrates the ground, eventually flowing into streams, lakes, and oceans |
| Transpiration | the process where water evaporates into the atmosphere through plants. |
| List the types of water on Earth | Saltwater Glaciers & Ice Caps Freshwater Groundwater |
| What percentage of the Earth's surface is covered with water? | 71% |
| What percentage of the Earth's total volume of water is saltwater? | 97% |
| What percentage of the Earth's total volume of water is freshwater in froze ice caps and glaciers? | 2% |
| What percentage of the Earth's total volume of water is freshwater in lakes, streams, groundwater, and water vapor? | 1% |
| Where is most of the Earth's freshwater located | Frozen in glaciers and ice caps |
| Where is most of the Earth's water located? | oceans |
| What percentage of the Earth's water is able to be used for drinking? | less than 1% |