U6: Meteorology: Atmosphere, Air Temperature and Air Pressure

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23 Terms

1

barometer

An instrument that measures atmospheric pressure

<p>An instrument that measures atmospheric pressure</p>
2

air pressure

The measure of the force with which air molecules push on a surface

<p>The measure of the force with which air molecules push on a surface</p>
3

altitude

Elevation above sea level

<p>Elevation above sea level</p>
4

air temperature

the measure of the average kinetic energy of molecules in the air

<p>the measure of the average kinetic energy of molecules in the air</p>
5

thermometer

An instrument used to measure temperature

<p>An instrument used to measure temperature</p>
6

Millibars

Metric unit of atmospheric pressure

<p>Metric unit of atmospheric pressure</p>
7

inches of mercury

units for air pressure (in of mg)

<p>units for air pressure (in of mg)</p>
8

Kelvin

SI unit for temperature

<p>SI unit for temperature</p>
9

Celsius

Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.

<p>Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.</p>
10

Fahrenheit

A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees

<p>A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees</p>
11

atmosphere

A thin layer of gases surrounding Earth

<p>A thin layer of gases surrounding Earth</p>
12

Troposphere

0-17 km above Earth's surface, site of weather, organisms, contains most atmospheric water vapor. (temperature decreases with increasing altitude, pressure decreases)

<p>0-17 km above Earth's surface, site of weather, organisms, contains most atmospheric water vapor. (temperature decreases with increasing altitude, pressure decreases)</p>
13

Mesosphere

The layer of Earth's atmosphere immediately above the stratosphere

<p>The layer of Earth's atmosphere immediately above the stratosphere</p>
14

Stratosphere

2nd layer of atmosphere; extends from 10 to 30 miles up; location of ozone layer; absorbs 95% of Ultraviolet radiation; temperature increases with altitude increase.

<p>2nd layer of atmosphere; extends from 10 to 30 miles up; location of ozone layer; absorbs 95% of Ultraviolet radiation; temperature increases with altitude increase.</p>
15

Ozone

A form of oxygen that has three oxygen atoms in each molecule instead of the usual two.

<p>A form of oxygen that has three oxygen atoms in each molecule instead of the usual two.</p>
16

ultraviolet radiation

a type of energy that comes to Earth from the Sun, can damage skin and cause cancer, and is mostly absorbed by the ozone layer

<p>a type of energy that comes to Earth from the Sun, can damage skin and cause cancer, and is mostly absorbed by the ozone layer</p>
17

mesopause, stratopause, tropopause

boundaries between layers of the atmosphere

<p>boundaries between layers of the atmosphere</p>
18

isobar

A line on a weather map that joins places that have the same air pressure

<p>A line on a weather map that joins places that have the same air pressure</p>
19

isotherm

A line on a weather map that joins places that have the same temperature.

<p>A line on a weather map that joins places that have the same temperature.</p>
20

high pressure system

a large body of circulating air with high pressure at its center and lower pressure outside of the system

<p>a large body of circulating air with high pressure at its center and lower pressure outside of the system</p>
21

low pressure system

a large body of circulating air with low pressure at its center and higher pressure outside of the system

<p>a large body of circulating air with low pressure at its center and higher pressure outside of the system</p>
22

anticyclone

A high-pressure center of dry air

<p>A high-pressure center of dry air</p>
23

cyclone

A swirling center of low air pressure

<p>A swirling center of low air pressure</p>