Скачать или смотреть Science Grade 6 Energy Transfer Through the Water Cycle 3.1 Lesson 4 Exercises 2026 كتاب المعاصر

Exercises on Lesson 4
1. Choose the correct answer:
1. During washing your hands, water falls down from the water tap toward your hands by the effect of (Fayoum 2024)
a. condensation.
b. freezing.
c. gravity.
d. precipitation.
b. very hot air moves above warm air.
2. All the following are examples of convection currents effect, except
a. cold air moves above hot air.
c. hot water moves above cold water.
d. warm water moves above cold water.
3. Wind is produced by the help of
a. water turbine.
c. solar radiation.
b. electric generator.
d. electric motor.
(Gharbia 2024)
4. Wind is formed when rises up and replaced by that flows from nearby areas. (Cairo 2024)
a. warm air- cold air
c. cold water warm water
b. warm water cold water
d. cold air-warm air
5. When warm air contains big amount of the warm air loses it in the form of rain. (Cairo 2025/Alex. 2024)
a. ice
b. liquid water
c. sleet
d. water vapor
6. When warm air is cooled, it will move
a. upward.
b. downward.
c. forward.
d. backward.
7. The .......air causes the formation of many desert areas around Earth's surface.
a. cold
b. moisted
c. dry
d. dusty
8. Wind helps in transporting water through the water cycle by carrying
a. sand grains.
b. small rocks.
c. plant leaves.
d. water vapor.
9. When the temperature of air............ its density
a. increases - increases.
c. increases - decreases.
b. decreases - decreases.
d. decreases - doesn't change.
2. Choose from column (B) what suits it in column (A):
(A)
1. Global Earth's system
2. Rotation of Earth
3. Convection currents and gravity
(B)
a. affect the movement of water through water cycle.
b. consists of winds that blow in a constant direction.
c. causes the disappear of some ecosystems.
d. one of the factors that determine the wind direction.
3 Put (v) or (x):
1. Solar energy is the main energy that causes the movement of convection currents in atmosphere and oceans.
2. Due to radiation currents, warm water moves above cold water.
3. The direction of wind is determined by the amount of solar radiation received by Earth. (Cairo 2024) ()
4. As air is warmed by the Sun, the air will fall down. (Qena 2024) ()
5. Wind is caused by the continuous exchange between warm air and cold air.
6. When the warm air flows away from its place to another one, it will cool and move downward.
7. Deserts are formed by the effect of moist air.
8. Unequal heating of Earth between the poles and the equator generates wind.
9. Earth has a global wind system that consists of water waves that move in a constant direction.
10. The weather condition will not be affected by the absence of wind.
4 Correct the underlined words:
1. Dry air causes the formation of large areas of rainforests around Earth's surface.
2. When the air is heated, it moves forward. (Giza 2025) ( )
3. Wind is formed due to electric generators that reaches Earth from the Sun.
5 Write the scientific term of each of the following:
1. It is caused when air warmed by the solar radiation rises and then replaced by cooler air that flows from nearby areas.
2. It is the main source that is responsible for warming of air and forming wind.
3. Large areas of land that are formed due to the effect of dry air.
6 Complete the following sentences using the words below: (rotation - deserts - direction - upward - solar radiation - winds - rain - downward)
1. The global wind system of Earth consists of over long periods of time. that blow in a constant
2. The direction of wind is determined by the amount of Earth and of Earth. received by
3. When warm air contains enough water vapor, it loses this water in the form of
4. When warm air is cooled, it moves when it is warmed. while cold air moves
5. Dry air causes the formation of large areas of around Earth's surface.
7 Give reasons for:
1. On adding warm water to cold water without shaking, the warm water stay above cold water without mixing.
2. The formation of wind is determined by the amount of solar radiation received by Earth.
8 What happens to ...?
1. The air temperature if there is no wind on Earth. (Alex. 2025)
2. The movement of air when solar radiation heats up the air in an area.
9 Rearrange the following steps that show how does wind form:
1. (........) The cold air replaces the hot air.
2. (........) The air is heated by the effect of Sun's radiation.
3. (........) The hot air rises up.
10 Look at the following figure, then complete the following sentences using the words between brackets:
(more - solar radiation - loses - less)
1. Air in area (A) moves upward, because it has density.
2. Air in area (A) becomes hot by the effect of
3. Air in area (B) moves downward, because it has density.
4. When air in area (A) moves to area (B), it thermal energy, so it will fall down near the Earth's surface.
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