Energy is a concept that pervades all areas of primary science — chemical and biologica! as well as physical. Although the physical aspects of energy will be the focus here, links to chemistry and biology will be noted where appropriate. The key points are
I . Energy is required for work to be done.
2. Energy comes different forms.
3. Energy can be changed from one form into another, When this happens, some energy is always lost in the form of heat,
Teaching Concepts
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Introduce energy from a personal, biological perspective: we need energy from food in order to live and do things. in the later stages, begin to introduce physical energy consumption through usage in the home.
Develop a wider understanding of the flow of biological energy through food chains. Develop the idea that machines also need energy to do things. Begin to introduce the idea that changes in materials involve energy being either used to effect change (as in melting) or released (as in burning).
Further develop the idea of biological energy flows that start with the energy output of the Sun. Develop the idea of the control of energy use, linked to force and power: Establish the rote of energy changes within both changes of state in matter and chemical changes.