Describe the northern lights

Exercise 1

State four words that you think describe the northern lights.

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Exercise 2

For someone who has never seen pictures of the northern lights or experienced the northern lights, it can be difficult to imagine what they are. Give a description of how the northern lights can appear.

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Exercise 3

Which of the following phenomena do you believe are necessary for the formation of the northern lights on earth? You can check more than one alternative.

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