1. Light and the sun

2. Objectives: Students will be able to explain how the sun produces energy which is transferred to the Earth by radiation

3. Today’s agenda
Quiz
Notes
Guided reading worksheets
Outlining

4. Electromagnetic spectrum
Electromagnetic spectrum- the arrangement of energy waves according to their wavelengths and frequencies

5. Doppler effect
The doppler effect is the change in wavelength of a wave that is emitted from a source that is moving away or toward an object

6. Doppler effect Red shifts- when objects are moving away
Blue shifts- when objects are moving towards something

7. The sun
It is 1 of 100 billion stars in the Milky Way Galaxy

8. Why does the sun shine?
Nuclear Fusion!!!

9. Nuclear Fusion
The sun shines because it produces energy by nuclear fusion
In the nuclear reaction, smaller atoms are fused together to make a larger one
Lots of energy is released from nuclear fusion
E = mc2
E= energy
M = mass
C= speed of light

10. Nuclear Fission The sun also produces energy by nuclear fission.
Nuclear fission is the splitting of large atoms into smaller ones
The energy released from fission is less than that released from nuclear fusion

11. Guided reading worksheets
Answer the two worksheets based on your reading from 24.1 and 24.3
After you are done, you will hand the worksheets up front…make sure your name is on them!
You will outline sections 24.1 and 24.3
If you do not finish the outlines today, we will finish them tomorrow