Word Detective

1234
Across
  1. 2. Colorful lights that appear in the sky near the North or South Pole.
  2. 4. A type of energy from the Sun that we cannot see but can cause sunburn and skin damage.
Down
  1. 1. A layer in the upper atmosphere that protects Earth by blocking most of the Sun’s harmful ultraviolet (UV) rays.
  2. 3. The height of a place or object above sea level.