15.2 Atmospheric Heating Weather Factors Sun’s energy travels to Earth as Electromagnetic waves: thermal heat transfer through a light spectrum. 2) Scattering: Reflections of light in all directions.

Radiation Ever feel the heat of the sun on your face or the heat from standing by a campfire? That is radiation. 3) Radiation: the transfer of energy by electromagnetic waves.

Conduction Have you walked barefoot on the sand at the beach and the sand burned your feet? That is conduction. 4) Conduction: direct contact/ transfer of heat from one substance to another.

5) Convection: The transfer of heat by the movement of fluid or air 5) Convection: The transfer of heat by the movement of fluid or air. Hot air rises, cold air sinks. Basement is colder than upstairs Transfer of energy by circulation. ( H Rises to C sinks) Convection

Examples to label: Cooking on the stove-pot on burner ________ Hot air balloon rising _________ Fireplace warming a room __________ Curling iron on hair ___________ Blow dryer on hair ______________ Air from furnace heating the house _____________

Bonfire Example for Energy Transfer 3 Ways: ______________ keeps you away. Smoke and flames are carried away by ______________. Ground beneath the fire gets hot by ________________.

In Summary: Energy from the sun is the _________________ behind the water cycle, which contributes to create Earth’s weather. Radiation is transfer by ____________________ waves. ______________________ is energy transfer by direct contact. Convection is energy transfer by _____________.

The Greenhouse Effect and Life on Earth As you have learned, about ____________________________ that enters Earth’s atmosphere is absorbed by clouds and by the Earth’s surface. This energy is converted into _____________________ that warms the planet. 6) The greenhouse effect: ___________________________________________. Increasing levels of greenhouse gases could cause global warming.

How is Earth heated? Light/heat from the sun _______________ through the atmosphere, hits the Earth where it is absorbed. This heats the air above it by ____________. This heat rises up to the ____________________ where it is trapped, cools, sinks and heats at the surface again.-________________. Think about it: Why does 70 degrees in Spring feel colder than 70 degrees in Fall?

Greenhouse Effect Basics Gases absorb the heat and act as a __________ to keep Earth warm. Some greenhouse gases: __________, _________, _______ ______________ The gases function like the glass walls and roof of a greenhouse, which allow _______ _______ to enter but prevent ________ _______ from escaping.

Runaway Greenhouse Effect: Global Warming? Many scientists have become concerned about data that show that average global temperatures have increased in the past 100 years. 7) global warming: _______________________ ________________________________________ Some scientists have hypothesized that an ______________________________ in the atmosphere may be the cause of this warming trend. Greenhouse gases absorb thermal energy in the atmosphere = higher temps, not convection

Greenhouse Effect Global Warming Question: Is Global Warming real? Is it a natural event or man made? Is it natural and people are making it worse?