Light and the sun.

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Presentation transcript:

Light and the sun

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

Today’s agenda Quiz Notes Guided reading worksheets Outlining

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

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

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

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

Why does the sun shine? Nuclear Fusion!!!

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

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

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

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