Understanding Tides
Explore the causes and types of tides with this comprehensive Grade 8 science worksheet.
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Understanding Tides
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Read each question carefully and answer to the best of your ability. Use complete sentences for short answer questions.
1. What is the primary cause of tides on Earth?
Earth's rotation
Wind patterns
The gravitational pull of the Moon and Sun
Ocean currents
2. How many high tides and low tides typically occur in a 24-hour period in most locations?
One high tide, one low tide
Two high tides, two low tides
Three high tides, three low tides
Four high tides, four low tides
3. Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the .
4. When the Moon, Earth, and Sun are aligned, tides occur, which are exceptionally high and low.
5. Neap tides occur when the Moon and Sun are at angles to each other relative to Earth, resulting in less extreme tides.
6. High tide occurs on the side of Earth closest to the Moon and on the opposite side.
True
False
7. The Sun has a greater effect on Earth's tides than the Moon because it is much larger.
True
False
8. Explain the difference between a spring tide and a neap tide.
9. Looking at the diagram above, what alignment of the Earth, Moon, and Sun would cause a spring tide?
Use the words below to complete the sentences.
10. The primary force responsible for tides is the pull of celestial bodies.
11. When the Sun and Moon are at right angles to each other, we experience tides.
12. The image above shows a beach at tide, where the water level is at its lowest.
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