Layers of the atmosphere

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Across
  1. 3. It is the layer that the Aurora borealis is in.
  2. 4. This is a layer of electrons that reflects radio waves.
  3. 6. It is the layer that contains something that blocks solar radiation.
  4. 9. This protects against solar radiation.
  5. 10. It is debated where the end of this layer is
  6. 11. This is the edge of space.
  7. 12. This is the barrier between the troposphere and the stratosphere.
Down
  1. 1. an example of this is "cloudy"
  2. 2. It is about 80% of the atmosphere.
  3. 5. It is the layer that slows down meteors.
  4. 7. A stream of greenish purplish lights in the sky.
  5. 8. these are chunks of rock hurtling towards planets