LESSON 3 PREDICTING WEATHER

LESSON 3 PREDICTING WEATHER

Chapter 7, Weather and Climate

OBJECTIVES

? Describe high- and low- pressure systems and the weather associated with each.

? Explain how technology is used to study weather.

MAIN IDEA

? To predict weather, scientists study air's properties and movement.

VOCABULARY

? isobar - lines that connect places with equal air pressure

? air mass - a large region of the atmosphere in which the air has similar properties throughout

? front - the boundary between two air masses

? cold front - cold air moves in under a warm air mass

? warm front - warm air moves in over a cold air mass

? occluded front - a weather front where a cold front catches up with a warm front and then moves underneath the warm front producing a wedge of warm air between two masses of cold air

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