Sun Notes. Starter If it is summer in the northern hemisphere, which statement is true? A.Earth has...
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Transcript of Sun Notes. Starter If it is summer in the northern hemisphere, which statement is true? A.Earth has...
Sun Notes
Starter
If it is summer in the northern hemisphere, which statement is true?
A. Earth has changed the tilt of its axis by 20 degrees due to its revolution.
B. It is winter in the southern hemisphere due to the tilt of Earth’s axis.
C. It is summer in the southern hemisphere due to the tilt of Earth’s axis.
D. Earth has reached its closest point to the sun due to its revolution.
The Sun
The sun is the source of all energy on Earth.
The Sun transfers energy by
1. Radiation
2. Conduction
3. Convection
The Sun
Radiation: transfer of energy through space by light and waves
Conduction: transfer of energy when molecules collide (touch)
Convection: transfer of energy by the flow of a substance (convection currents)
The Sun
Light absorbed by plants is turned into food. This is called photosynthesis.
Plants need Water, Carbon Dioxide and light to produce food (glucose) and Oxygen
6H20 + 6CO2 light C6H12O6 + 6O2
THE SUN’S ENERGY Nuclear Fission
Splitting of large-nuclei elements, such as uranium or plutonium, into smaller pieces with the release of considerable energy.
Used on Earth to produce electricity in nuclear power plants and to make atomic weapons.
Nuclear fusion
Combining of atomic nuclei into larger nuclei with the release of a very large amount of energy.
Occurs only on the sun
Requires a temperature of tens of millions of degrees C.
How Sun’s Energy is Transferred
Solar radiation is radiant energy emitted by the sun, particularly electromagnetic energy.
Conduction occurs when energy is transferred from earth’s surface air to atmospheric air.
Convection occurs as pockets of air near earth’s surface are heated, become less dense, rise, cool, and sink. Then heated and cycle over again.
How Sun’s Energy is Transferred
http://www.kudzuacres.com
Energy from the Sun video
https://app.discoveryeducation.com/search?Ntt=the+sun