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CSEE (Form 4) Skills for Science — practice questions

Explore 3 free Skills for Science questions in CSEE (Form 4) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Skills for Science questions and exercises with answers

Showing questions 1–3 of 3.

The seven SI base units are called base units for which reason?Read the answer and worked solution →A learner must mix a strong acid with water in a laboratory. Which order is the safe one?Read the answer and worked solution →Two quantities are inversely proportional. What happens to the second one when the first one is increased?Read the answer and worked solution →

Worked practice questions

The seven SI base units are called base units for which reason?

  1. None can be built from the other six
  2. Each is used more often than others
  3. They were the first units measured
  4. They all describe a length somehow
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Correct answer: A. None can be built from the other six

1. Every physical quantity has a unit, and all units can be built from a small starting set. 2. Those starting units are called base units because none of them can be expressed as combinations of the other six. 3. They work like the letters of an alphabet, and every other unit is a word built from them. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 1: Skills for science_

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A learner must mix a strong acid with water in a laboratory. Which order is the safe one?

  1. Add the water to the acid
  2. Add the acid to the water
  3. Add both at the same time
  4. Add ice to the acid first
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Correct answer: B. Add the acid to the water

1. Mixing acid and water releases heat, and heat released too fast can spit the liquid out of the container. 2. The safety rule is short and fixed: never add water to acid, always add the acid to water. 3. Pouring water onto acid puts a small mass of water on a large mass of acid, so the heat is concentrated and dangerous. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 1: Skills for science_

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Two quantities are inversely proportional. What happens to the second one when the first one is increased?

  1. It gets larger
  2. It stays the same
  3. It gets smaller
  4. It doubles in size
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Correct answer: C. It gets smaller

1. Proportion describes how one quantity answers a change in another. 2. Directly proportional quantities move the same way, a more and more relationship. 3. Inversely proportional quantities move opposite ways, so raising one lowers the other. 4. A graph of two inversely proportional quantities is a curve that never cuts either axis. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 1: Skills for science_

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