Copy of `Clouds R Us - Weather terms`

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Clouds R Us - Weather terms
Category: Meteorology and astronomy > Clouds and Winds
Date & country: 21/10/2013, US
Words: 47

Acid rain
Rain which is acidic as a result of pollution

Air pressure
The weight of the air in the atmosphere pressing down on the Earth

An instrument that measures the speed or force of the wind

The layer of air that surrounds the Earth and is held there by the pull of the

An imaginary line about which the Earth spins every 24 hours

An instrument that measures air pressure

Beaufort scale
A scale of numbers representing different wind speeds and a description of their

A winter storm with strong winds and heavy snow

The usual pattern of weather in a particular place

Compressed air
Air which has been squeezed into a small space

To change from a gas or vapour to a liquid, through cooling

The name for a tropical storm originating in the Indian Ocean

An area of low pressure

A prolonged period with very little or no rain

An imaginary line around the Earth midway between the North and South Poles

The process by which a liquid becomes a gas due to heating

Something that tells us what the weather is going to be like

The boundary between two masses of air with different temperatures (ie: a mass of cold air and a mass of warm air)

A slow-moving mass of ice and snow

Pieces of ice that sometimes form in high clouds

High Pressure
A mass of air that presses down strongly on the surface of the Earth because it is being cooled and is therefore more dense

The amount of water vapour held in the air

A violent, spiralling storm that forms over the Atlantic Ocean, with winds over 120 kph

Ice Age
A period approximately 18,000 years ago when ice covered a large part of the Earth's surface

A line on a weather map linking areas with equal air pressure

Low Pressure
A mass of air that presses down only weakly on the surface of the Earth because it is being warmed and it therefore less dense

A unit used to measure atmospheric pressure

A seasonal wind that brings rain to many places of the world, for example India and Southern Asia

Occluded Front
An area where warm air is pushed upwards as a cold front overtakes a warm front and pushes underneath it

The path of the Earth around the sun, or of satellites around the Earth

The gas found in the stratosphere that protects us from the Sun's harmful ultra-violet (UV) radiation

Ozone Layer
A layer of air in the atmosphere that contains a relatively high concentration of the gas ozone

Pressure Centre
A region of high or low pressure

A wave of energy sent across space. Examples include heat and light energy

Device that circles high above the Earth and can be used for monitoring the weather

Stevenson Screen
A white box with ventilated sides that is used to house weather instruments and protect them from direct sunlight

The second layer in the atmosphere above the Earth's surface. It extends up to 50 km and contains the ozone layer

A measure of how hot or cold something is

An instrument for measuring the temperature of something, for example the air

A funnel-shaped whirlwind which extends to the ground from storm clouds

An area on the Earth's surface that lies between 30

The lowest region of the atmosphere in which all the Earth's weather takes place

The name for a tropical storm originating in the Pacific Ocean, usually the China Sea

Ultra-violet Radiation
The radiation found in the Sun's rays beyond the violet part of the visible spectrum. It can be harmful to both plant and animal life

The gaseous form of a substance that is normally a liquid, for example water vapour

A moving mass of air. The movement of the air causes the weather

Wind Vane
An instrument for showing wind direction