Published on February 5, 2014
Weather and Climate UNIT 4
1- What is the difference between weather and climate? The difference between weather and climate is a measure of time. Weather is what conditions of the atmosphere are over a short period of time, and climate is how the atmosphere "behaves" over relatively long periods of time.
Activities Exercises 1 and 2 on page 35.
2- What causes the seasons? (no exam) -The movements of the Earth .it rotates on its axis .it orbits the Sun -The rotation of the Earth .the Earth spins in an anticlockwise direction (it completes a rotation every 24 hours) .it causes days and nights -Revolution around the Sun .the Earth takes 365 days to orbit the Sun (a year) .seasons are created.
3- How are temperature and climate related? With the average temperatures we can divide the Earth into different climates zones: .Hot climate zone .Temperate climates zones .Cold climates zones
The angle of the Sun’s rays
4- What factors affect temperature? 1- Latitude:
3- Distance from the sea: The sea makes coastal climates more temperate. Inland climates are more extreme.
Activities Exercises 1, 2 and 3 on page 39.
5- What factors affect precipitation? PRECIPITATION -> rain, snow, sleet, dew, etc, formed by condensation of water vapour in the atmosphere. HUMIDITY -> a measure of the amount of moisture in the air.
Factors affecting precipitation 1- Latitude - it rains more near the equator. 2- Altitude - it rains more in high areas. 3- Level of humidity - it rains more in the coast.
Activities Exercises 1 and 2 on page 40.
6- What types of rainfall are there?
Activity Exercise 1 on page 41
7- How does atmospheric pressure affect the weather? Atmospheric pressure is the force per unit area exerted on a surface by the weight of air above that surface in the atmosphere of Earth.
Activity Exercise 1 on page 42
8- What types of winds are there? Prevailing winds -> always blow in the same direction.
Periodic winds -> change direction seasonally.
Synoptic winds -> change daily.
Local winds -> influenced by the geography at a specific area.
Anemometer Thermometer Weather vane
Activities Exercises 1 and 2 on page 43. Exercises 4 and 5 on page 45.
Web Task 4 Page 45. Global warming and the greenhouse effect. Instructions on the blog. Deadline: 25 November.
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