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Weather&Atmosphere
DDMS 7th Grade Science - Weather & Atmosphere Unit
| Question | Answer |
|---|---|
| The horizontal movement of air from an area of high pressure to an area of low pressure | Wind |
| An instrument used to measure wind speed | Anemometer |
| A local wind that blows from the water to the land | Sea Breeze |
| A local wind that blows from the land to the water | LandBreeze |
| Bands of high speed wind that occur about 10 Km above the Earth's Surface | Jet Stream |
| The process of the water vapor in the air becoming a liquid | Condensation |
| The temperature at which condensation begins | Dew Point |
| Wispy, feathery looking clouds, that form at high levels in the atmosphere | Cirrus |
| Fluffy, round-looking clouds, that form less than 2 km from the ground | Cumulus |
| Clouds that form in thin, flat layers | Stratus |
| Any form of water that falls from the clouds and reaches the Earth's Surface | Precipitation |
| The condition of the Earth's atmosphere at a particular time and place | Weather |
| The envelope of gasses that surround a planet | Atmosphere |
| Water in the form of a gas | Water Vapor |
| The amount of mass that is contained in a certain volume | Density |
| The force caused by the weight of air pushing down on an area | Air Pressure |
| An instrument used to measure air pressure | Barometer |
| The elevation, or height above sea level | Altitude |
| A large body of air with similar temperature, humidity, and air pressure | Air Mass |
| A warm, low pressure air mass | Tropical |
| A cold, high pressure air mass | Polar |
| A humid air mass, that forms over an ocean | Maritime |
| A dry air mass, that forms over land | Continental |
| The boundary where two air masses meet | Front |
| A warm air mass that has been caught between two cold air masses, and is cut off from the ground | Occluded |
| A violent disturbance in the atmosphere, caused by a sudden change in pressure | Storm |
| A small storm that brings heavy precipitation, and thunder and lightning | Thunderstorm |
| What type of front occurs when warm air slowly moves over a cooler air mass? | Warm Front |
| What type of front occurs when a cold air mass quickly moves into a warmer air mass, and forces the warm air upward? | Cold Front |
| What type of front occurs when a cold & warm air mass meet, but neither one moves past the other? | Stationary front |
| What type of weather does a low pressure system typically bring? | Cloudy & Rainy |
| What type of air is typically associated with a high pressure system? | Cold air |
| What type of air mass would bring cold, dry air? | Continental Polar Air Mass |
| What happens when warm air & cool air combine | The less dense warm air rises and the more dense cool air sinks |
| A large vertical growth cloud, that typically brings thunderstorms & serious weather | Cumulonimbus Cloud |
| Large scale movement of air, due to unequal heating of Earth's surface | Global Wind |
| Why do the tradewinds turn to the west as they approach the equator? | The Coriolis Effect |
| The Global winds that affect most of the United States, and bring most weather from the Southwest toward the Northeast. | Prevailing Westerlies |
| The area near the equator, where very little wind occurs because warm air is rising. | Doldrums |
| How does an increase in altitude affect air pressure & density? | Air pressure & density will decrease |
| What type of air would a maritime tropical air mass bring? | warm, humid air |
| The area in the central US where most tornadoes occur | Tornado Alley |
| What are the two most abundant gasses in our atmosphere? | Nitrogen & Oxygen |
| The global wind that occurs near the north & south pole | Polar Easterlies |
| Global winds that occur near the equator | Tradewinds |
| A rise in the water level, caused by offshore winds pushing the water toward the shore | Storm Surge |
| The area created when warm, moist air rises, and moves counter-clockwise. | High Pressure System (Cyclone) |
| The area created when cool air sinks, and moves clockwise. | Low Pressure System (Anti-Cyclone) |
Created by:
jfakins
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