What is the key concept for this section? Define weather. Define front and distinguish between a warm front and a cold front. What is atmospheric pressure? Define and distinguish between a high and a...

What is the key concept for this section? Define weather. Define front and distinguish between a warm front and a cold front. What is atmospheric pressure? Define and distinguish between a high and a low. What are El Niño and La Niña? Summarize their effects. Explain how tornadoes form and describe their effects. What are tropical cyclones and what is the difference between hurricanes and typhoons? How do these storms form?