Week 11: Climate Change and Weather What did you do in lab today? The water cycle: How did we forecast weather before our modern technology? Red sky at night Bones aching Cows laying down (rain coming) Why does weather typically come from the west? We rotate into it Three variables that cause weather: Air Water Heat The density, less dense = warm, more dense = cold. As the sun comes up, air “warms” up and moves creating a convection cell. Yes, that same convection cell that makes the plates move. What was the big question? What is cold and warm fronts? What is pressure systems ? What did you learn in Thursday’s discussion? EXAM !! 4. Read the online textbook, chapter 11: 1. What did you learn? Water on Earth’s surface (like lakes, rivers, and oceans) evaporates and turns into a gas called water vapor . Water vapor cools and condenses into tiny droplets that form clouds . The droplets combin...