Starter quiz
- Which of the following organisms are decomposers?
- earthworm ✓
- leopard
- butterfly
- bat
- dung beetle ✓
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- Carbon dioxide is an important part of which of the following cycles?
- water cycle
- nutrient cycle
- life cycle
- carbon cycle ✓
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- How is carbon returned to the atmosphere in the carbon cycle?
- combustion ✓
- respiration ✓
- photosynthesis
- decomposition
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- Plants take in carbon dioxide from the air. They use this for ______.
- 'photosynthesis' ✓
- Why are decomposers important in a stable ecosystem?
- They return nutrients to the atmosphere.
- They break down dead organisms and waste material. ✓
- They cause organisms to die.
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- Which of the following statements about the amount of carbon dioxide in the atmosphere is correct?
- The carbon dioxide levels are decreasing as plants are photosynthesising more.
- The carbon dioxide levels are increasing as we are burning more fossil fuels. ✓
- The carbon dioxide levels are increasing as all organisms are respiring less.
- The carbon dioxide levels are increasing due to deforestation. ✓
- The carbon dioxide levels are decreasing as the oceans absorb it all.
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Exit quiz
- The heat from the sun causes water to turn into water vapour (a gas). This process is called ...
- condensation.
- evaporation. ✓
- precipitation.
- transpiration.
- percolation.
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- The process of water vapour cooling and turning back to a liquid is called ...
- condensation. ✓
- evaporation.
- precipitation.
- transpiration.
- percolation.
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- When water droplets combine in clouds they get heavier. When they are too heavy they fall to Earth. Water falling to Earth is called ...
- condensation.
- evaporation.
- precipitation. ✓
- transpiration.
- percolation.
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- Transpiration takes place when water vapour leaves a plant through the ...
- roots.
- leaves. ✓
- stem.
- flowers.
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- Starting from water being turned into water vapour by the heat of the sun, put the processes in the order that they occur in the water cycle.
- 1⇔evaporation
- 2⇔condensation
- 3⇔precipitation
- 4⇔percolation
- Which of the following is not a reason why water is important for life?
- Chemical reactions inside cells need water.
- Damp surfaces allows diffusion of gases to take place.
- It transports materials around organisms.
- It is essential for keeping organisms clean. ✓
- It provides structural support to plants.
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Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- The water cycle shows how water is recycled on planet Earth.
- Water is continuously being evaporated and precipitated.
- Plants lose water through transpiration.
- Water availability impacts upon a species' ability to survive in a habitat.
Common misconception
The water cycle only includes the processes of evaporation from the Earth's surface to the atmosphere and condensation returning water to the Earth.
There is exemplification of how the water cycle involves percolation of water into the ground and how plants use this water. Some of this is released by transpiration.
Keywords
Evaporation - Evaporation is the process of changing a substance from a liquid to a gas.
Condensation - Condensation is the change of state from a gas to a liquid.
Transpiration - Transpiration is the loss of water vapour through the leaves of plants (through stomata).
Precipitation - Precipitation is water that falls from clouds in the form of rain, sleet, snow or hail.
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