Weather and Climate
Mr Zingy is a meteorologist and spends much of his time measuring air studying weather, air temperature, air pressure, wind direction, humidity and precipitation to report on the evening news. How would life change if Mr Zingy quit his job one day with no one to replace him?
Lesson 1: Weather
Weather is the atmospheric conditions, along with short term changes, of a certain place at a certain time.
Air temperature is the measure of the average kinetic energy of air molecules.
Air pressure is the pressure that a column of air exerts on the air below it.
Wind direction is the direction from which the wind is coming.
Humidity is the amount of water vapor per volume of air and is measured in grams of water per cubic meter of air.
The amount of water vapor present in the air compared to the maximum amount of water vapor the air can hold at a temperature before becoming saturated is the relative humidity. Eg., relative humidity of 50%
The temperature at which air becomes fully saturated with water vapor and condensation forms is the dew point.
When water, in liquid or solid form, falls from the atmosphere it is called precipitation.
Lesson 2: The Water Cycle
To understand how the water cycle works, read the text below and listen to the song from the video. Then type up the song. Finally, answer the questions at the end of the video.
Heat from the Sun causes water on Earth to change into gas. Warm air rises. Water that evaporates from lakes, streams, and oceans enters Earth's atmosphere as water vapor. As the air masses rise, the air expands and cools down. When the air cools down, the water vapor changes from a gas back into a liquid, a process called condensation. As the water vapor condenses, water droplets form. These water droplets than form clouds. When the droplets become larger and heavier, precipitation falls from the clouds to Earth's surface.
!) Why does air rise?
2) Why does it cool down?
3) Why do clouds form?
4) Why does it rain?
Lesson 3: How cold and warm fronts produce clouds and rain
You are planning a trip to Asia and Africa. You need to work out what clothes to take. The only information you have on the weather from satellite images is the following:
Q2: What is the weather you should expect in Nairobi? What clothes should you wear?
Task Helper 1: Useful points from the textbook
Task Helper 2: Helpful video
Lesson 4: How Earth's shape determines intensity of solar radiation
1) Why does Jenny get more powerful sunshine in June?
2) Why does Vijay get more powerful sunshine in January?
3) When is it summer for Jenny?
4) When is it winter for Jenny?
5) When is it summer for Vijay?
6) When is it winter for Vijay?
Lesson 5: Floods and Droughts
1) Why is there a drought in Nono's country?
2) In Salimah's village in Bangladesh, snow melted very quickly this summer. Could this have caused the flood? How?
3) Salimah's neighbors are blaming the new Japanese car company in the neighborhood for making it difficult to deal with the flood. Could they be right? Explain how.
Lesson 6: The Weather in California
A) Why fog forms on the coast
John lives on the Pacific coast in California. On many days, John sees that the coast has a thick layer of fog over it. Explain why. Use the following sequence in your description:
B) Rain Shadows
1) Jane lives on the green side of the mountain. Explain why her side is green.
2) Amelia lives on the dry side of the mountain known as the rain shadow. Why is it so dry there?
C) Sea Breeze and Land Breeze
A wind that blows from the sea to the land is called a sea breeze
A wind that blows from the land to the sea is called a land breeze
Explain why does John get a cool breeze during the day? Explain in a paragraph.
D) Valley Breeze and Mountain Breeze
Imagine yourself as the Santa Ana Wind. In the first person describe your journey from being a cool wind to a dry, speedy one that sweeps into LA and sets fire to dry land.
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