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Showing posts with label weather [wind] [2] [comprehension quiz]. Show all posts
Showing posts with label weather [wind] [2] [comprehension quiz]. Show all posts

weather [wind] [2] [comprehension quiz]

weather [wind] [2] [comprehension quiz]
Wind is the movement of air masses around the Earth.

The movement is caused by the difference in the air pressures of these air masses.

This is shown here over a map of Australia.
These air masses are either:

areas of low pressure [L]
or
areas of high pressure [H].
Here is a satellite picture showing a high pressure area and a low pressure area over the UK.
High pressure areas [H] always move towards low pressure areas [L].
High pressure areas [H] are areas of cool, dry and usually good weather.

Whereas, low pressure areas [L] are areas of warm, moist and usually bad weather.
By now you must be wondering how do you measure air pressure.

This object is called a barometer and it measures air pressure in units called millibars.
5 question quiz [template]

1. What is wind?
the movement between atmospheric layers
the movement of air masses
the movement of warm air upwards

2. In which direction do winds move?
high pressure to low pressure
low pressure to high pressure
low and high pressure to equator

3. Which instrument is used to measure air pressure?
anemometer
thermometer
barometer

4. Which unit is air pressure measured in?
millipedes
millibars
milliseconds

5. What causes wind?
heat from the Sun
the rotation of the Earth
the difference in air pressure

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