"GREEN GRASS"

Plants need sunlight and water to make their own food. You can do an experiment to test if this is true. Place a bucket over a patch of green grass.

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After a few days, lift the bucket. You will see that the grass is not as green anymore. If you leave the bucket in place for a week, the grass will become very dull.

This happens because the grass cannot make food in the dark. Remove the bucket. In a few days, the grass will start turning green again.