2.1 Natural science

Natural sciences

Energy transfers and forces

Educator section

Memorandum

1. Kilojoules.

2. Is determined by one’s mass, age and energy consumption.

3. Such a person will not have enough energy to do well, seeing that he/she has not eaten anything.

Leaner section

Content

Activity 2: to collect information on nutritional value in foodstuffs [lo 1.2]

Collect some wrappers or packaging from foodstuffs. Study the information provided on these:

1. What is the unit of measurement for energy? ______________________________

2. How many of these units should you take in daily? _________________________

3. Try to explain why someone who is on a hunger strike should not be selected to take part in a marathon.

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2. Where does energy come from?

We obtain almost all energy indirectly from the sun. The sun radiates heat and light and still retains enough nuclear power to continue shining for the next 5 000 million years.

A bus or a train uses fuel to transport passengers from one point to another in the same way that a person uses the sun as a source of energy.

Fuel is the substance in which energy is contained.

Assessment

Learning Outcome 1: The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

Assessment Standard 1.2: We know this when the learner conducts investigations and collects data: organises and uses apparatus/equipment or sources to gain and record information.

1.2.1: tests two or more items and compares results;

1.2.2: uses a specific procedure for observations.