| A | B |
|---|
| three fourths | How much of the Earth's surface is water? |
| Many rivers flow into it. | Why is the Baltic Sea less salty than other seas? |
| Air pressure will be lower. | What will you experience at the top of a mountain? |
| Oceans are salty, fresh water is not. | How are ocean water & fresh river water different? |
| water vapor becoming liquid as it cools | What is condensation? |
| Water evaporates in the Sun's warmth. | How does the sun affect the water cycle? |
| Weather fronts & how they are moving | What do curving lines on a weather map indicate? |
| it cools & the water vapor condenses into clouds. | When moist air rises, |
| the gases that surround Earth's surface. | Air is.... |
| measures air pressure. | A barometer... |
| the amount of water vapor in the air. | Humidity is.... |
| water vapor in the warm air mass cools & condenses to form clouds. | You often see clouds along a cold front because... |
| the air moves to the area of low pressure. | When there is an area of low pressure nearby, |
| clouds that are close to the ground that often bring rain or snow. | Stratus clouds are... |
| the changing of water to water vapor. | Evaporation is.... |
| a device that shows the direction from which wind is blowing. | A wind vane is ..... |
| a device used to measure wind speed. | An anemometer is.... |
| a scientist who studies weather conditions. | A meteorologist is... |
| any form of water that falls to Earth. | Precipitation is..... |
| the area where two air masses meet. | A front is.... |
| the increase in Earth's average temperature. | Global warming is... |
| they keep the Earth warm. | Greenhouse gases are beneficial because... |
| the sun evaporates water, air cools, then drops as rain or snow. | The water cycle is when.. |
| a cold front forms. The cold air sinks, the warm air is pushed up, cools, forming clouds. | When a cold air mass meets a warm air mass... |
| shows how weather is changing; tracks precipitation. | Weather radar ... |
| using devices, radar, data, & weather maps | Weather forecasters predict weather by... |
