Weather
Amount of rain depends greatly on
surface temperature of the ocean
Why does warm ocean water result in more rain?
Warm water evaporates faster than cooler water and clouds form over warmer water
What causes wind to form?
The sun heats the atmosphere unevenly
What happens to the water vapor when it moves to cooler air?
It condenses and forms rain
What would happen if there was no wind created over the oceans?
The rain would just fall back down over the ocean area.
The study of weather
meteorology
Why is cold air denser?
The molecules of water vapor are closer together and they apply more pressure
This weather instrument measures air temperature.
thermometer
This weather instrument measures air pressure.
barometer
This weather instrument measures wind speed.
anemometer
This weather instrument measures humidity.
hygrometer
This weather instrument measures the amount of rain that has fallen over a period of time.
rain gauge
This weather instrument measures the direction wind is blowing.
wind vane or wind sock
Higher humidity indicates a greater chance of this type of weather.
rain
This type of air has lower humidity and this indicates less chance of rain.
Cooler air
cooler air is coming, which means less
rainfall
When a barometer rises it shows more
Pressure Which means more rainfall
If an anemometer shows a change in this, it may mean a change in weather is coming.
wind speed
If a hygrometer shows an increase in this, it often means it is about to rain.
humidity
How does knowing the direction of wind help forecast weather?
The future weather will probably be what is behind the direction of the wind.
large body of air that has the same temperature and humidity throughout
air mass
produces winds
changing air masses
Most air masses over the United States move in this direction.
west to east
the border in which two air masses meet, and usually result in weather changes
front
What happens when water vapor is cooled and condensed rapidly at a front?
causes heavy rainfall and thunderstorms
This symbol indicates a warm front on a weather map.
Red line with half circles
This symbol indicates a cold front on a weather map.
Blue line with triangles
This symbol indicates high-pressure on a weather map.
H
This symbol indicates low-pressure on a weather map.
L
High pressure indicates this type of weather.
fair
Low pressure indicates this type of weather.
stormy
the pattern of weather over a long time
climate
the condition of the atmosphere at a particular time
weather