weather map

2. an air mass with less atmospheric pressure than the surrounding air masses; air moves toward the area of low pressure, traveling in a counterclockwise direction in the northern hemisphere and a clockwise direction in the southern hemisphere
4. amount of water vapor or moisture content in air
7. a form of energy that spreads out as it travels
9. 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
12. measures wind direction
13. the boundary between an advancing warm air mass and a receding cooler air mass
16. Map a map or chart that shows the weather conditions at a specific point in time over a specific region
17. the force exerted by the atmosphere on Earth's surface by the weight of the air above the surface
18. global air circulation patterns within the atmosphere held to Earth by gravity and warmed as heat radiates from Earth; influenced by convection of warm, less dense air (rises and spreads out) and cold, dense air (sinks)

1. air mass with greater atmospheric pressure than the surrounding air masses; air moves away from the center of the high pressure, traveling in a clockwise direction in the northern hemisphere and a counterclockwise direction in the southern hemisphere
3. measures relative humidity
5. A stationary front is a weather front or transition zone between two air masses, when neither air mass is advancing into the other at a speed exceeding 5 knots at the ground surface.
6. measures wind speed
8. instrument that measures the amount of atmospheric pressure
10. measures air temperature
11. the day-to-day state of the atmosphere
14. the border between an advancing cold air mass and a retreating warm air mass
15. measures wind direction