DO NOW: R&H PP.82-84 1. WHAT IS ENERGY?2. WHAT ARE THE TWO SOURCES OF ENERGY FOR THE

EARTH?3. WHAT IS ABSOLUTE ZERO?4. WHAT IS ELECTROMAGNETIC ENERGY?5. WHAT CAN HAPPEN TO ELECTROMAGNETIC ENERGY

WHEN IT COMES INTO CONTACT WITH A MATERIAL (3 THINGS) , DESCRIBE THEM.

HW: A&E P. 84 #1-12

12-1-14Aim: What is energy?

Interactions Between Energy and the Environment

When electromagnetic Energy comes into contact with a material it can:

Refract- bent to a different wavelength when passing through substances of different density.

Reflect- bounced off the material.Scattered- refracted and/or reflected in

various directions.Transmitted- passed through the material.Absorbed- taken into the material.

Surface Properties and Absorption

When energy comes into contact with a surface of a material depending on its color and texture the energy will either absorb or reflect.

Color- light colors tend to reflect energy while dark colors will absorb it.

Texture- Rough textures will absorb while smooth textures will reflect ( like a mirror).

*The combination of color and texture will result in what the material will do. Ex. Snow and ice are excellent reflectors because they are both light and smooth.

12-2-14Aim: How is energy transferred?

Do Now: R&H pp. 85-89.1. What is mechanical energy?2. What is temperature?3. What is a joule?4. What is specific heat?

HW R&H pp. 90-92, A&E #13-30.

Transfer of Energy

Energy moves from an area of high concentration to an area of low concentration, from source to sink, until a dynamic equilibrium is reached ( a balance).

Methods of Energy Transfer-energy will travel from source to sink by one of the

three methods.1. Conduction- the transfer of energy from

molecule to molecule when vibrating molecules collide. Most effective in solids where molecules are very close together or from substance to substance.

2. Convection- the transfer of heat by movement in fluids (liquids or gasses), caused by uneven heating creating different densities. Warmer substances are less dense and rise and cooler substances are more dense and sink creating a circular pattern called a convection current or cycle or cell.

3. Radiation- the method by which energy is transferred via electromagnetic waves. Energy is given off by a substance and no medium is required for energy to travel. Ex. Sun radiates energy towards earth. (Fastest method)

12-3-14Aim: How is energy transferred during a phase

change?

Do Now:1. Explain why and how convection works.2. Look on the first page of the reference table,

which substance would heat up the quickest from the list and which would heat up the slowest? Also, which would cool off the fastest?

3. As altitude increases what happens to potential energy?

4. At what temperature does ice melt and water boil (in farenheit and celcius)?

HW. A&E p.93 #31-48.

12-5-14Aim: What is Insolation?

Do Now: Read p.100-102 and diagram.1. What does insolation mean?2. During what phase change is the most

energy released?3. How does conduction work and what does

it work best in?

HW. R&H pp.100-104, A&E #1-10

12-8-14Aim: What is a heat budget?

Do Now:1. What is insolation?2. What effect does too much CO2 in the

atmosphere create?3. What happens to insolation as it is

absorbed into the earth and reradiated back out?

HW- R&H pp. 105-109, A&E #11-31Topic 5/6 Exam Thursday.

12-9-14Aim: What causes shifts in the earth’s heat budget?

Do Now: How do sunspots, changes in tilt, volcanic eruptions, desertification, deforestation, urbanization affect earth’s heat budget? pp.114-115

How is the earth protected from ultra violet radiation and why are we not as protected as we used to be? p.101

HW- Study all of topics 5&6 for exam Thursday.

12-10-14Aim: Topics 5&6 Review

Do Now: Re-draw your diagram of the greenhouse effect. Be sure to label fusion, fission, convection, conduction, radiation, atmosphere, ozone layer, short visible light, long infra-red heat, reflection, refraction, scattering, absorption, insolation, re-radiation.

Explain how the greenhouse effect works and describe the importance of the ozone layer and how that is being depleted.

HW- Study all of Topics 5&6 for exam Thursday.