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JCE (Botswana) Gravity and the Moon — practice questions

Explore 4 free Gravity and the Moon questions in JCE (Botswana) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Gravity and the Moon questions and exercises with answers

Showing questions 1–4 of 4.

What holds the Moon in its path around the Earth?Read the answer and worked solution →A learner has a mass of 60 kilograms on Earth, where each kilogram weighs about 10 newtons. What is that learner's weight on Earth?Read the answer and worked solution →What are tides?Read the answer and worked solution →The Sun, the Moon and the Earth line up in a straight line. What kind of tides follow?Read the answer and worked solution →

Worked practice questions

What holds the Moon in its path around the Earth?

  1. The push of the wind
  2. The pull of gravity
  3. The heat of the Sun
  4. The spin of the air
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Correct answer: B. The pull of gravity

1. Gravity is a force that attracts any two objects that have mass. 2. The Earth and the Moon both have mass, so they attract each other. 3. That pull keeps bending the path of the Moon into an orbit. 4. Without it the Moon would simply travel off in a straight line. _Source: Siyavula Natural Sciences Grade 7 (CC BY 4.0), Gravity_

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A learner has a mass of 60 kilograms on Earth, where each kilogram weighs about 10 newtons. What is that learner's weight on Earth?

  1. 600 newtons
  2. 60 newtons
  3. 100 newtons
  4. 360 newtons
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Correct answer: A. 600 newtons

1. Mass is the amount of matter and is measured in kilograms. 2. Weight is the force of gravity on that mass and is measured in newtons. 3. On the surface of the Earth each kilogram of mass weighs about 10 newtons. 4. The learner has a mass of 60 kilograms. 5. So the weight is 60 multiplied by 10, which gives 600 newtons. 6. Answering 60 newtons confuses the mass number with the weight. 7. Answering 100 newtons would be the weight of a 10 kilogram object instead. _Source: Siyavula Natural Sciences Grade 7 (CC BY 4.0), Weight_

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What are tides?

  1. The waves made by strong wind
  2. The flow of water in a river
  3. The rise and fall of sea level
  4. The spray thrown up by rocks
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Correct answer: C. The rise and fall of sea level

1. Tides are the repeated rise and fall of the level of the sea. 2. At low tide the water is far out and sand is exposed. 3. At high tide the water reaches much further up the beach. 4. Wind driven waves are a separate thing and are not tides. _Source: Siyavula Natural Sciences Grade 7 (CC BY 4.0), Tides_

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