U6: Lesson 1 Atmospheric Variables

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25 Terms

1

Temperature

A measure of the average energy of motion of the particles of a substance.

<p>A measure of the average energy of motion of the particles of a substance.</p>
2

air pressure

A force that is the result of the weight of a column of air pushing down on an area.

<p>A force that is the result of the weight of a column of air pushing down on an area.</p>
3

thermometer

An instrument used to measure temperature

<p>An instrument used to measure temperature</p>
4

wind speed

how fast the air is moving

<p>how fast the air is moving</p>
5

anemometer

An instrument used to measure wind speed

<p>An instrument used to measure wind speed</p>
6

wind vane

measures wind direction

<p>measures wind direction</p>
7

humidity

The amount of water vapor in the air

<p>The amount of water vapor in the air</p>
8

relative humidity

The percentage of water vapor in the air compared to the maximum amount of water vapor that air can contain at a particular temperature

<p>The percentage of water vapor in the air compared to the maximum amount of water vapor that air can contain at a particular temperature</p>
9

station model

indicates weather conditions at a specific location, using a combination of symbols on a map

<p>indicates weather conditions at a specific location, using a combination of symbols on a map</p>
10

sling psychrometer

tool made of a wet and dry thermometer that measures relative humidity and requires a table to interpret the two temperatures

<p>tool made of a wet and dry thermometer that measures relative humidity and requires a table to interpret the two temperatures</p>
11

dewpoint temperature

The temperature to which air has to cool , in order for condensation to take place, air becomes saturated, clouds, dew, fog forms

<p>The temperature to which air has to cool , in order for condensation to take place, air becomes saturated, clouds, dew, fog forms</p>
12

saturated air

air that contains as much water vapor as is possible for that temperature

<p>air that contains as much water vapor as is possible for that temperature</p>
13

hygrometer

measures humidity

<p>measures humidity</p>
14

barometer

An instrument that measures atmospheric pressure

<p>An instrument that measures atmospheric pressure</p>
15

wet bulb thermometer

The thermometer in a psychrometer that is used to measure the wet-bulb temperature

<p>The thermometer in a psychrometer that is used to measure the wet-bulb temperature</p>
16

dry-bulb thermometer

normal thermometer that measures the current air temperature

<p>normal thermometer that measures the current air temperature</p>
17

wet bulb temperature

The lowest temperature that can be obtained by evaporating water into the air. Must be lower than the dry bulb temperature

<p>The lowest temperature that can be obtained by evaporating water into the air. Must be lower than the dry bulb temperature</p>
18

Dry Bulb Temperature

The temperature of air measured by a thermometer freely exposed to the air

<p>The temperature of air measured by a thermometer freely exposed to the air</p>
19

water vapor

water in the form of a gas

20

water droplets

water in liquid form, clouds and fog

<p>water in liquid form, clouds and fog</p>
21

absorb

to take in

<p>to take in</p>
22

reflect

to bounce back

<p>to bounce back</p>
23

altitude

Elevation above sea level

<p>Elevation above sea level</p>
24

Evaporation

The change of a substance from a liquid to a gas

<p>The change of a substance from a liquid to a gas</p>
25

Condensation

The change of state from a gas to a liquid

<p>The change of state from a gas to a liquid</p>