Energy transfers and forces
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Energy transfers and forces
a) Electrical energy / sound energy / light energy.
b) Kinetic energy / potential energy.
c) Light energy.
d) Electrical energy / light energy / heat energy.
e) Kinetic energy / heat energy.
f) Chemical energy / heat energy / light energy.
Label the following sketches by naming the energy source that is depicted.
| (a) |
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| Television |
| (b) |
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| “Jack-in-the-box” |
| (c) |
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| Lighthouse |
| (a) |
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| Lightning |
| (e) |
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| Moving vehicle |
| (f) |
|
| Burning fire |
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(a) Conduction
Conduction occurs when heat moves through solid substances. Take a length of wire and hold it over a flame. What do you discover after a little while?
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The heat was transferred to your hand by means of conduction. Metals like copper, iron and aluminium are better conductors of heat than non-metals such as wood, water and cork. Particular metals also conduct heat faster than others.
Paste or draw such materials here.
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Learning Outcome 2:The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.
Assessment Standard 2.3: We know this when the learner interprets information by identifying key ideas in text, finding patterns in recorded data, and making inferences from information in various forms (e.g. pictures, diagrams, text).
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Last edited by Siyavula User on Mar 6, 2009 5:22 am -0600.