Time for Science! Please get your Science notebooks And your pencil And your computer Then go to Click SCIENCE Week 1-8 Read over the standards, Essential Question and Lesson Expectations, then scroll to the bottom and find Week 8 at the bottom.

Weather and Climate 6.1 Introduction to Weather 6.2 Weather Patterns 6.3 Climates and Biomes

6.1 Introduction to Weather Weather is a term that describes the condition of the atmosphere in terms of temperature, wind, and atmospheric pressure.

_______________ is a term that describes the condition of the atmosphere in terms of temperature, wind, and atmospheric pressure.

_______________ is a term that describes the condition of the _____________ in terms of temperature, wind, and atmospheric pressure.

_______________ is a term that describes the condition of the _____________ in terms of ___________, wind, and atmospheric pressure.

_______________ is a term that describes the condition of the _____________ in terms of ___________, wind, and _____________ pressure.

_______________ is a term that describes the condition of the _____________ in terms of ___________, wind, and _____________ _____________.

_______________ is a term that describes the _____________ of the _____________ in terms of ___________, wind, and _____________ _____________.

Thinking about what weather means, which picture doesn’t belong, and why?

Question….. What is weather? What is not? Wind Water in a creek Rain Flooding CloudyWind from a fan Warm outside Heat from a dryer Warm inside Heat from the sun

What does dense mean???

6.1 Temperature Heated air near a hot surface is less dense than the colder air above it. The heated air rises, forcing the colder air to move aside and sink toward the ground. Then this colder air is warmed by the surface, and it rises. Wind is created.

6.1 Temperature Heated ________ near a ________ surface is less ________ than the ________ air above it. The heated air rises, forcing the colder air to move aside and sink toward the ground. Then this colder air is warmed by the surface, and it rises. Wind is created.

6.1 Temperature Heated ________ near a ________ surface is less ________ than the ________ air above it. The ________ air rises, forcing the ________ air to move aside and sink toward the ground. Then this ________ air is warmed by the ________, and it rises. ________ is created.

What is wind?

6.1 Pressure 1.When warm air rises from Earth’s surface, an area of low pressure is created. 2.This lower-pressure area draws in air from surrounding higher- pressure areas. 3.Eventually the warm air that rose from the surface cools and becomes more dense. 4.Dense, cool air sinks back to the surface causing an area of high pressure. 5.This new high pressure may become the source of more wind.

6.1 Pressure 1.When __________ air rises from Earth’s surface, an area of __________ pressure is created. 2.This lower-pressure area draws in air from surrounding higher-pressure areas. Basically, when there is nothing there, something will rush in to fill it. When you get a bucket full of water out of a pool, more water rushes into that area – same with air. When the air rises, something has to fill that space…..cold air! 3.Eventually the _________ air that rose from the surface __________ and becomes more ____________. 4.Dense, cool air sinks back to the surface causing an area of high pressure. 5.This new high pressure may become the source of more wind.

6.1 Pressure Think of density like this. Kids who are hot and are playing in the pool will be all over the place playing. They will run around and splash and swim – and they need space. You can’t put a whole bunch of kids into a pool if they are really hot and want to play. Once those kids are cooled off, though, they won’t need as much room to run around and splash and swim and jump. You can fit more kids in the pool. OR…….. Think about kids outside on the playground in elementary school. It’s pretty cold outside, and so they aren’t running around playing so much – they huddle up closer to stay warm. You can fit more kids on the playground if they aren’t running around and playing. Silly? YES! But do you get it now?????

6.1 Pressure So to sum it up…. Air is heated by the ___________. That air is (hot, cold) and rises. When the (hot, cold) air rises, more cold ___________ rushes in to fill in the empty space. Then THAT air is heated by the _________, and the cycle keeps repeating!

6.1 Convection in the atmosphere Convection One way that heat is transferred from one place to another is convection. Convection happens when heated molecules move from one place to another, taking the heat with them. Convection happens in the atmosphere and in the oceans. Heated air in our atmosphere expands (remember – all those molecules are hot, so they move around a LOT more), becoming less dense. Because it is less dense, it rises upward. Cooler air rushes in to replace the air that lifted up. As warm air rises and cool air falls, a giant circular pattern is created. Eventually the warmer air cools and begins to fall again.

6.1 Convection in the atmosphere Another way to say that….. Convection is motion in the air or in water where the warmer part rises, and the colder parts sink.

6.1 Convection in the atmosphere Convection near coastlines causes sea breezes during the day and land breezes at night.

6.1 Convection in the atmosphere Convection near coastlines causes sea breezes during the __________and land breezes at _______.

6.1 Convection in the atmosphere __________ near coastlines causes sea breezes during the __________and land breezes at _______.

6.1 Convection in the atmosphere __________ near coastlines causes __________ breezes during the __________and ____________ breezes at _______.

6.1 Convection in the atmosphere A small upward flow of warm air is called a thermal. Pilots of sailplanes (which lack engines) fly by riding the thermals.

6.1 Convection in the atmosphere A small upward flow of warm air is called a ___________. Pilots of sailplanes (which lack engines) fly by riding the thermals.

6.1 Convection cells The combination of global convection and Earth’s rotation sets up a series of wind patterns called convection cells.

6.1 Convection cells The combination of global convection and Earth’s rotation sets up a series of wind patterns called ________________ _______________.

6.1 Coriolis effect The bending of currents of air due to the Earth’s rotation is called the Coriolis effect.

6.1 Air and water vapor Three important global wind patterns exist in each hemisphere: –Trade winds –Prevailing westerlies –Polar easterlies

6.1 Air and water vapor Water in gas form is called water vapor. Like a soggy sponge, air reaches a point and can’t hold anymore vapor. The vapor turns back into liquid and form droplets. Use these pictures to explain how the cycle can continue.

6.1 Relative Humidity Relative humidity is a measure of how much water vapor an air mass contains.