WEATHER FACTORS KEY TERMS

Question 1

Condition of the atmosphere at a specific time and place.

Answer 1

Weather

Question 2

High pressure center in the northern hemisphere with winds blowing clockwise outward from the middle causing clear skies.

Answer 2

Anticyclone

Question 3

Low pressure center in the northern hemisphere with winds blowing counterclockwise toward the middle causing clouds and precipitation.

Answer 3

Cyclone

Question 4

Deflection of curving of winds and ocean currents due to the rotation of the earth.

Answer 4

Coriolis Effect

Question 5

Movement of air along Earth’s surface.

Answer 5

Wind

Question 6

Air that moves up and down.

Answer 6

Air Current

Question 7

Line on a map connecting points of equal air pressure.

Answer 7

Isobar

Question 8

Line on a map connecting points of equal temperature.

Answer 8

Isotherm

Question 9

Amount of water vapor in the air.

Answer 9

Humidity

Question 10

Measure of the amount of thermal (heat) energy.

Answer 10

Temperature

Question 11

Temperature at which condensation occurs.

Answer 11

Dew Point

Question 12

The weight of air pressing on a surface.

Answer 12

Air Pressure

Question 13

Change from a gas to liquid.

Answer 13

Condensation

Question 14

Change from a liquid to a gas.

Answer 14

Evaporation

Question 15

Clouds along the ground.

Answer 15

Fog

Question 16

Gray, thick blanket-like clouds that bring rain.

Answer 16

Nimbostratus

Question 17

White, fluffy, cotton ball-like clouds that mean fair weather.

Answer 17

Cumulus

Question 18

Low, flat, expansive, blanket-like clouds.

Answer 18

Stratus

Question 19

High, feather clouds made of ice crystals.

Answer 19

Cirrus

Question 20

Tall, anvil-shaped clouds that form during thunderstorms; thunderhead clouds.

Answer 20

Cumulonimbus

Question 21

Instrument used to measure wind speed.

Answer 21

Anemometer

Question 22

Instrument used to measure wind direction.

Answer 22

Wind Vane

Question 23

Instrument used to measure air pressure.

Answer 23

Barometer

Question 24

Instrument used to measure temperature.

Answer 24

Thermometer

Question 25

Instrument used to measure relative humidity.

Answer 25

Psychrometer

Question 26

Instrument used to measure the amount of precipitation.

Answer 26

Rain gauge

Question 27

Rain, snow, sleet, and hail.

Answer 27

Precipitation

Question 28

Precipitation in which raindrops freeze as the fall to earth; above freezing in clouds but below freezing at ground level.

Answer 28

Sleet

Question 29

Precipitation in which strong winds repeatedly blow raindrops up high in clouds where a new layer of frost forms forming a small to large ball of ice which falls to earth.

Answer 29

Hail

Question 30

Precipitation in which raindrops freeze after they hit the ground; above freezing in clouds but below freezing at ground level.

Answer 30

Freezing Rain

Question 31

Precipitation in which water vapor condenses directly into ice crystals in the clouds which fall to the surface; below freezing in clouds.

Answer 31

Snow

Question 32

Precipitation in which liquid drops of water fall from clouds. It is above freezing in clouds and at ground level.

Answer 32

Rain

Question 33

Fast moving west-to-east flowing "river" of air high in the troposphere that influences weather.

Answer 33

Jetstream