3.8 To use units of measurement and explaining why it is important

Natural sciences

Matter, measuring and reactions

Educator section

Memorandum

Assignment 4:

1.

• km
• m ³
• mm
• g en mg
• kl of m ³
• m ²
• m en cm
• ton
• kl of cm ³
• light years (the distance light travels in one year)

• Examples to explain the importance of measurement: any three good examples, e.g.
• the amount of medicine someone has to drink
• how much cement and sand should be mixed for building
• to measure achievements in athletics (high jump, long jump, sprints, etc.)

Leaner section

Content

Activity: to use units of measurement and explaining why it is important to be able to measure [lo 2.4]

Before I am able to determine my expenses with regard to fuel for a planned journey, I need to know the distance that I will be travelling. If I want to tile the kitchen floor, I need to calculate the size of the floor (surface). When we want to work out how much milk a baby of a particular age and mass should get, we need to be able to measure the volume (contents) of a bottle, etc. The metric system of measurement (the Système International d'Unités , or SI) is used in most parts of the world. The most important units that we have to deal with according to the SI system of measurements are represented in the following table:

1. Give the units of measurement that you would use to measure the following?

• the distance that a space shuttle travels around the earth.
• the amount of concrete required for the foundations of a house
• the circumference of roller skate wheels.
• the mass of a locust.

• 

  the capacity of a swimming pool.
• the size (surface) of a tennis court.
• the length of our educator.
• the mass of a truck.
• the capacity of a hot water cylinder.
• the distance from the earth to the nearest star.

2. Name three further examples to show the importance of being able to measure.

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Assessment

Learning Outcome 2: The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 2.4: We know this when the learner application of knowledge: applies knowledge appropriately by connecting the learnt concept to a variation of the known situation.