| A | B |
|---|
| The _________ is the bottom layer of the atmosphere. | troposphere |
| Many clouds reflect a lot of sunlight because they have a high______. | albedo |
| Temperatures decrease in the third layer of the atmosphere, the __________. | mesosphere |
| The___________contains only a tiny fraction of the atmospherse's mass. | thermosphere |
| The _______ is the first day of summer. | summer solstice |
| In the Northern Hemisphere, the ___________ occurs on September 22 or 23. | autumnal equinox |
| ______is a form of oxygen with three oxygen atoms in each molecule. | Ozone |
| Solar energy reaches Earth by_________. | radiation |
| March 21 or 22 is the ________ in the Northern Hemisphere. | spring equinox |
| ________ is the energy transferred from one object to another due to a difference in their temperatures. | Heat |
| The average kinetic energy of the atoms or molecules in a substance is its __________. | temperature |
| The ozone layer is found in the ___________. | stratosphere |
| When you touch a hot metal spoon, you experience heat transferred by __________. | conduction |
| The lines on a world isothermal map are called____________. | isotherms |
| Water being heated in a pan circulates because of___________. | convection |
| Light reaches areas that are not in direct light by means of_______________. | scattering |
