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Science 7 · Unit 3: Forces and energy · Cambridge Lower Secondary Science Stage 7

3.4 Tides

15 questions · e.g. When is the next high tide?

Practice

Questions

  1. 1. What causes high and low tides on Earth?

    Check

  2. 2. It is high tide in a harbour. About how many hours until the next high tide?

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  3. 3. It is high tide in a harbour. About how many hours until the next low tide?

    Check

  4. 4. When are the highest tides on Earth?

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  5. 5. The Moon and the Sun are on opposite sides of Earth, all in a line. What are the tides like?

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  6. 6. The Moon and the Sun are on the same side of Earth, all in a straight line. What are the tides like?

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  7. 7. It is high tide at 05:00 when a boat leaves the harbour. The boat cannot use the harbour at low tide. When can it NOT get back in?

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  8. 8. At high tide at 05:00, at which other time will there be about a low tide?

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  9. 9. Marcus measures the depth of water in a harbour with a scale. What unit does the scale use?

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  10. 10. Look at the scale in the harbour. What is the depth of the water?

    543m
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  11. 11. Marcus wants to record how the water depth changes from one high tide to the next. Which time interval between measurements is best?

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  12. 12. A force caused by gravity from the Moon makes the tides. What is it called?

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  13. 13. Position A on Earth faces the Moon. In which direction does the force causing the tide act at A?

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  14. 14. Position A on Earth faces the Moon. Does it have a high tide or a low tide?

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  15. 15. It is 08:00 at position A, which has a high tide. When is the next high tide at A?

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