Science

4. the movement of air over Earth’s surface in patterns that are worldwide. .
6. with strong winds.
8. The jet stream is a fast flowing, river of air found in the atmosphere at around 12 km
9. the front edge of a moving mass of warm air.
10. A low pressure system is a whirling mass of warm, moist air that generally brings
12. the edge of a moving mass of cold air.

1. is the average weather in a place over many years.
2. parts move down.
3. a whirling of cool, dry air that generally brings fair weather and light winds.
5. the surface of the Earth just under the tropopause.
7. the movement in a gas or a liquid in which the warmer parts move up and the
11. It is the mix of events that happens each day in our atmosphere.