What Causes the ‘Tides’ and How Do They Affect Life?

Imagine the Earth is like a giant ball of water, and the Moon is like a strong friend who gently pulls on it. When the Moon pulls on one side of the Earth, water rises up, that's a high tide. On the opposite side, water also rises because it’s being pulled away, another high tide! In between, the water goes down, that's low tide. This pulling happens twice a day, and it helps creatures like crabs and seaweed live in the ocean.

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Examples

  1. A crab climbs out of its shell as the water rises, revealing the beach.
  2. Children build sandcastles at the shore when the water goes down during low tide.
  3. Fish swim in and out of shallow pools every day because of the rising and falling water.

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Categories: Science · tides· oceanography· gravity