1.The weight of air that presses down is called air _____________________ . A)direction B)speed C)pressure 2. Wind moves from ____________________ pressure area to __________________ pressure area. A)low, high B)high, low 3. _______________________ is used in thermometer and barometer. A)mercury B)water C)nitrogen 4. Normal air pressure at sea level is _____________________ mb. 5. In the absence of anemometer, we can use ____________________________ to measure speed of wind. A)barometer B)wind vane C)Beaufort scale