EXAMEN - Social Science 3 - Unidad Air and Weather [PDF]

Zitiervorschau

Air and weather The air around us 1. Complete these sentences: oxygen

carbon dioxide

live and grow

water vapour

live and breathe

nitrogen

make their own food

a. b.

______________________________________ makes up a very small part of the air we breathe. ______________________________________ makes up only 0.04% of the air, but it is very

c.

important. Plants need carbon dioxide to _____________________________ . ____________________________________ makes up 78% of the air. All living things need it to

d.

_______________________ . ________________________________________ makes up 21% of the air. Living things need it to _______________________________________ .

2. Answer these questions: a.

What is the atmosphere made up of?

b.

Which are the closest layers of the atmosphere to the Earth?

3. Choose the correct word to complete the sentences:

a.

The mesosphere / stratosphere / troposphere is the closest layer to the Earth. We can breathe

b. c.

the air here. Weather, such as rain and wind, occurs here. The mesosphere / stratosphere / troposphere protects us from the strong rays from the Sun. The mesosphere / stratosphere / troposphere protects us from most of the objects that fall from space, such as meteorites.

4.

Label this picture about the closest layers of the atmosphere to the Earth:

5. Write definitions: “Weather is ___________________________________________________________” “Humidity is __________________________________________________________” “Wind is _____________________________________________________________” “Precipitation is _______________________________________________________”

6. True or False? Correct the sentences that are False: a. b. c. d. e. f. g. h. i.

When the weather is hot, the temperature is low. When the weather is cold, the temperature is high. The instrument we use to measure temperature is an anemometer. When there’s a lot of humidity, fog and clouds can form. Breeze is strong wind. Gale is light wind. A hurricane is a very strong wind. Precipitation can be liquid or solid. Rain, snow and hail are not forms of precipitation.

7. Choose the correct word to complete these sentences: a. b.

Hail is a form of solid / liquid precipitation. Rain is a form of solid / liquid precipitation.

8. Air pollution. Label these pictures:

9. Weather instruments. Match these words with their definitions: Thermometer: Wind sock: Anemometer: Wind vane: Rain gauge:

it measures wind speed and shows wind direction. it measures humidity. it measures rainfall. it measures air temperature. it measures wind speed.

10. Revision. Complete this word map: