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Wood in Water

A clear tank holds water and three wood blocks. Two pale blocks float at the top, while one dark block rests on the bottom.

In the picture

  1. A pale wood block floating at the water surface on the left.
  2. A pale wood block floating at the water surface on the right.
  3. A dark wood block resting on the tank bottom.

Examples

  • A cork floats on bathwater.
  • A heavy wooden tool can sink to the bottom of a bucket.

Quiz: Wood in Water (Age 9)

  1. Which is true about wood from different trees?

    • Some wood is heavier than water, so it sinks.
    • All wood is lighter than water, so it floats.
    • Wood becomes heavier than water only when it is wet.
  2. Why does a piece of wood sink in water?

    • It is heavier than the same amount of water.
    • It is lighter than the same amount of water.
    • It has been in the water for a long time.
  3. If a piece of ordinary wood floats in water, what does that tell you about it?

    • It is lighter than the same amount of water.
    • It is heavier than the same amount of water.
    • It weighs the same as the water.

The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.

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Age 9