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Listed under:  Health  >  Psychology  >  Cognition  >  Concepts  >  Paradigms
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In digestion

Follow the passage of food through the human body. Select foods and drinks and decide how to digest them. For example, choose to chew, to add saliva to the mouth or add gastric juices to the stomach. Watch how the body reacts to changes. Find out more about digestion along the way and answer questions.

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Energy chains: energy use

Select energy sources and energy converters to build energy chains to power appliances and vehicles. Examine how each energy converter in a chain loses some energy and reduces the energy available for use. For example, show that using a solar panel and an electric motor to drive a car delivers only 16% of the original ...

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Seasons

Control the motion of the Earth in its orbit around the Sun. Work out how the Earth’s orbit and the tilt of its axis determine seasons in the different hemispheres. Work out how the Earth’s orbit and the tilt of its axis determine day length in the different hemispheres. Examine the heating effect of the Sun. Compare seasons ...