Predicting Weather

2. The boundary between an advancing warm air mass and a receding cooler air mass
4. Based on probability
6. The day-to-day state of the atmosphere
9. A map or chart that shows the weather conditions at a specific point in time over a specific region
10. The border between an advancing cold air mass and a retreating warm air mass
11. Directional movements of ocean water; surface currents result from steady winds over the ocean surface; deep currents result from density variations due to temperature and salinity differences
12. Features on the surface of Earth, such as mountains, hills, dunes, oceans, or rivers

1. The layer of gas surrounding a planet that is held in place by gravity
3. Similar weather for a certain number of days
5. A body of air extending over a large area (1,000 miles or more) that develops and retains specific characteristics of pressure, temperature, and humidity
7. A prediction or estimate of future events
8. Winds that act as a heat transfer system due to the unequal heating of Earth’s surface