Term
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Definition
| As speed increases, pressure decreases |
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Term
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Definition
| A thin blanket of gases and dust particles |
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Term
| What does the atmosphere do? |
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Definition
1. Protects the surface
2. Lets in the right amount of energy from the sun
3. Prevents extreme weather differences |
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Term
| What are the main gases in AIR? |
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Definition
nitrogen (78%)
oxygen (21%)
carbon dioxide and other gases (1%) |
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Term
| Can you see or feel gases? |
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Definition
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Term
| What is the purpose of dust particles? |
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Definition
| Dust particles help water droplets and ice crystals in the clouds form rain, snow and other types of precipitation |
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Term
| What force holds the atmosphere close to the earth? |
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Definition
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Term
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Definition
| The average level of the surface of the ocean between high and low tides |
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Term
True or False
The terms atmosphere and air are the same |
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Definition
False
The atmosphere is a gaseous layer that surrounds the earth composed of air and other particles such as dust
Air is the mixture of gases found in the atmosphere |
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Term
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Definition
| The weight of the air; each square inch has 14.7 lb. of pressure |
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Term
True or False
Air pressure is greatest further from the earth's surface |
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Definition
False
Air pressure is that greatest at the surface of the earth |
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Term
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Definition
| The measurement of the distance above sea level |
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Term
| What can affect air pressure? |
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Definition
| Altitude and temperature changes |
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Term
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Definition
| An instrument used to measure air pressure |
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Term
| Why is it useful to know about air pressure? |
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Definition
| To predict weather, to fly a plane |
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Term
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Definition
Layer of atmosphere closest to earth
Responsible for holding in radiant heat to keep earth warm
Contains particles and water droplets that affect weather |
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Term
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Definition
| Condition of the atmosphere |
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Term
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Definition
2nd layer of the atmosphere
Here the temperature increases as altitude increases |
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Term
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Definition
| Upper part of stratosphere; Ozone is a from of oxygen..protects surface of earth from sun's radiation |
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Term
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Definition
| higher layers of atmosphere; meteors burn up in the mesosphere |
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Term
| What are 2 other layers furthest from the earth's surface? |
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Definition
| Thermosphere and exosphere |
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Term
| What layer would you find weather and communication satellites? |
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Definition
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Term
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Definition
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Term
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Definition
| large body of air that has nearly the same temperature and moisture |
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Term
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Definition
* air pressure of dense, cool air
*because of its density, it is hard to hold until moisture so high pressure air masses are cool and dry
*Generally move towards the surface of the earth |
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Term
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Definition
| light, warm air that contains moisture |
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Term
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Definition
| The boundary of 2 unlike air masses |
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Term
| What are 3 types of fronts |
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Definition
| Cold, Warm and Stationary |
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Term
| Does a cold air mass usually push under or over a warm air mass? |
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Definition
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Term
| What type of weather does a cold front bring? |
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Definition
| Rain, possibly thunderstorms and hail followed by cool, dry weather |
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Term
| Does a cold or warm front move faster? |
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Definition
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Term
| What type of weather does a warm front bring? |
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Definition
| light rain or fog followed by warm moist weather |
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Term
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Definition
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Term
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Definition
| Move in large circular belts around the earth |
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Term
| Provide examples of global winds? |
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Definition
| Trade winds, prevailing westerlies and polar easterlies |
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Term
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Definition
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Term
| What happens to temperature of air as it rises? |
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Definition
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Term
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Definition
| Influenced by temp changes in small areas |
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Term
| What causes land and water to heat? |
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Definition
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Term
| Which cools faster? land or water? |
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Definition
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Term
| What are examples of local winds? |
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Definition
| sea breezes, land breezes, mountain winds |
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Term
| Why do breezes blow in from the water during the day? |
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Definition
| Land is warmer than water; air over the land rises and cooler air moves in to replace it |
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Term
| Why do the breezes switch at night? |
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Definition
| The air over water is warmer so the air moves toward the water |
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Term
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Definition
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Term
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Definition
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Term
| What is another way to measure wind speed? |
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Definition
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Term
| Is air less dense in a valley or mountain |
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Definition
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Term
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Definition
| any type of moisture that falls from the atmosphere and reaches the ground i.e. snow, rain, hail, sleet |
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Term
| What determines the size of rain drops? |
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Definition
temperature, wind, air fronts and type of clouds
*Most raindrops are round and slightly flat |
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Term
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Definition
| is the temp at which water vapor in the air reaches a saturation point |
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Term
| What causes freezing rain? |
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Definition
| When the air is above freezing but the temp of the earth's surface is below freezing |
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Term
| As the temperature decreases, what happens to the size of snowflakes? |
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Definition
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Term
True or False
Hail usually falls cold weather |
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Definition
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Term
True or False
Dew and frost are forms of precipitation |
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Definition
False
They do not fall from the sky; instead they are formed from condensed water vapor on earth |
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Term
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Definition
| Water vapor in the atmosphere |
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Term
| Which can hold more moisture? Warm or cool air |
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Definition
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Term
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Definition
| From condensed water vapor or ice crystals |
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Term
| How are clouds classified? |
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Definition
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Term
| What are 3 basic shapes of clouds? |
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Definition
| Cumulus, stratus and cirrus |
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Term
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Definition
| Clouds that form precipitation |
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Term
| What the most familiar type of clouds? |
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Definition
| Cumulus which are big and fluffy also known as fair weather clouds that bring sunny, pleasant weather |
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Term
| What are thunderstorm clouds called? |
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Definition
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Term
| What do cirrus clouds look like? |
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Definition
| thin, curly clouds high in the sky |
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Term
| Who created a cloud classification system? |
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Definition
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Term
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Definition
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Term
| Which type of cloud is lowest in the sky? |
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Definition
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Term
| Which type of cloud is the highest in the sky? |
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Definition
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Term
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Definition
| When a large swift moving warm air mass meets a cold air mass |
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Term
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Definition
Created when during a storm, air temps change quickly and air movement is strong causing friction
Is a type of static electricity |
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Term
| What is the temperature of lightning? |
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Definition
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Term
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Definition
| Vibrations caused by the rapid heat change when lightning heats the air around it |
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Term
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Definition
| Central plains and Southeast...Texas, Oklahoma, Kansas and Nebraska |
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Term
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Definition
| A funnel shaped cloud of swirling wind that reaches the ground; can reach speeds of 250 mph |
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Term
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Definition
| spiraling winds that form over the ocean |
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Term
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Definition
| what hurricanes are called in the western Pacific Ocean |
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Term
| What are some other examples of severe weather? |
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Definition
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Term
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Definition
| snowstorm with strong freezing winds and blowing snow...makes it difficult to see |
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Term
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Definition
| a period of time with higher than average temps |
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Term
| What is the difference between a weather watch and a weather warning? |
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Definition
A watch means that conditions are right for sever weather but is not currently happening
A warning means that the storm has begun |
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Term
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Definition
| Scientist who studies atmosphere and weather |
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Term
| What is the symbol for a cold front? |
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Definition
| a line with triangles under it |
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Term
| What is the symbol for a warm front? |
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Definition
| a line with 1/2 circles above it |
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