| A | B |
|---|
| _________is the cause of skin cancer? | Ultraviolet rays |
| What percentage of the atmosphere is oxygen? | 21% |
| The Earth has 5 main layers of atmosphere. What are these layers? | troposphere, stratosphere, mesosphere, thermosphere,& exosphere. |
| One important layer of the thermosphere is the....? | ionosphere |
| When time of day can you here AM radio well? | night time |
| The higher you go the less pressure or the higher pressure? | It gets lower the higher you go. |
| What does a Barometer measure? | air pressure |
| Is cold air more dense than hot air? | cold air is more denser |
| The ___ ___ is a layer in the stratosphere where concentrations of it is high? | ozone layer |
| ______is the transfer of energy by electromagnetic waves? | Radiation |
