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A double rainbow appears at Iguazu Falls. Rainbows can form when sunlight hits water droplets that spray from the falls.

Rainbows appear to be arcs. But a full rainbow is a circle. The ground is in the way of its bottom half. People may see the full circle from high places, such as an airplane.

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Making Connections


Have you ever seen a rainbow? What did you think?


Have you read other books about weather topics? What new thing did you learn?


People across the world enjoy rainbows. Why do you think people like them?

Teacher Resources

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