(32) Air masses can change _________ and moisture as they move. When two air masses meet (33) they form a boundary called a _____. Fronts are usually _____ or cold. On the picture below, (34) label the warm front, cold front, occluded front, high pressure area, and low pressure area.
(35) A cold front occurs when _____air moves ____the warm air. It pushes the warm air (36) up. When the warm air _____it cools and the moisture condenses forming _____.
(37) This can lead to rain. If the temperature differences between the fronts are large then (38) severe weather may occur, such as ___________or tornadoes.
(39) A warm front occurs when warmer air moves ___heavier, colder air. The moisture (40) in the air __________as the warm air rises. This will form _______and may result in (41) light rain or _____. Then the weather should be _______and milder.
(42) When scientists create a forecast, they look at air masses, high and low pressure
(43) systems, __________, wind speed, humidity, precipitation, and ____________. They (44) use computers to help create a _____of what to expect. Forecasts are ___________, (45) they are not a guarantee of the weather that will happen.
(46) The _____the Earth receives from the sun has a huge impact on our weather. The
(47) _____from the sun warms the _________. As we learned in the unit on the sun, moon, (48) and earth, the sun’s rays can be _____or _______, so they can provide more or less (49) heat. Some areas will receive __________energy from the sun and the air masses in (50) those areas will be warmer.
(34) In the picture, the warm front should be labeled as WF, the cold front as CF, the occluded front as OF, the high pressure area as HP, and the low pressure area as LP.
(35) A cold front occurs when cold air moves under the warm air. It pushes the warm air up.
(36) When the warm air rises, it cools and the moisture condenses forming clouds.
(37) This can lead to rain. If the temperature differences between the fronts are large, then severe weather may occur, such as thunderstorms or tornadoes.
(39) A warm front occurs when warmer air moves over heavier, colder air. The moisture in the air rises as the warm air rises. This will form clouds and may result in light rain or drizzle. Then the weather should be cloudy and milder.
(42) When scientists create a forecast, they look at air masses, high and low pressure systems, fronts, wind speed, humidity, precipitation, and temperature. They use computers to help create a prediction of what to expect. Forecasts are estimates; they are not a guarantee of the weather that will happen.
(46) The amount of energy the Earth receives from the sun has a huge impact on our weather. The radiation from the sun warms the Earth's surface. As we learned in the unit on the sun, moon, and earth, the sun's rays can be absorbed or reflected, so they can provide more or less heat. Some areas will receive more energy from the sun, and the air masses in those areas will be warmer.