AIM: How does the sun make energy? QOD: What is one benefit and one drawback to using wind power to...
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AIM: How does the sun make energy? QOD: What is one benefit and one drawback to using wind power to generate electricity? Solar power
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Transcript of AIM: How does the sun make energy? QOD: What is one benefit and one drawback to using wind power to...
AIM:How does the sun make
energy?
QOD: What is one benefit and one
drawback to using wind power to generate electricity?
Solar power
AIM:How does the sun make
energy? Aim: How does the
sun make energy and how do we use it?
3
AIM:How does the sun make
energy?Objectives
• SWBAT describe the process of nuclear fusion
• SWBAT compare and contrast active and passive
• SWBAT describe what photovoltaic cells are and explain how they are used to capture energy from the sun. 3
AIM:How does the sun make
energy?
The Sun
A medium-sized star that radiates energy from nuclear fusion reactions in its core
AIM:How does the sun make
energy?
2. The mass lost transforms
into energy (like in fission, in nuclear power)
Nuclear Fusion1. The sun turns hydrogen into helium
AIM:How does the sun make
energy?
Solar power1 square meter on earth gets ~ 1 kilowatt (17 light-bulbs) of energy
The sun’s energy is so strong that if only 0.1% of the earth (New Mexico + South Dakota) were covered in solar panels, we would have enough
electricity for the whole world.
A map of the world showing kilowatt hours per region
AIM:How does the sun make
energy?
How do we collect solar power?Two main ways…
1.Passive 2. Active
AIM:How does the sun make
energy?
1. Passive solar energy collection=use the sun’s energy to heat something
directly
Ex: materials chosen that absorb heat well, South-facing windows
Ex: 700 yrs ago, Ancestral Puebloans lived in passive solar cliff dwellings
AIM:How does the sun make
energy?
1. Passive solar energy collection
AIM:How does the sun make
energy?
2. Active solar energy collection
= using technology to focus, move, or store solar energy.
AIM:How does the sun make
energy?
2. Active solar energy collection
AIM:How does the sun make
energy?
Power tower in Spain
AIM:How does the sun make
energy?
Photovoltaic cell
“photo” = light “volt” = electricity
Photovoltaic cell – produces electricity
AIM:How does the sun make
energy?
How do photovoltaic cells work?
2. Electrons are released
3. Moving electrons electricity!
1. Sunlight hits the array
Array = a group of photovoltaic cells
AIM:How does the sun make
energy?
Is solar power renewable
or non-renewable?
AIM:How does the sun make
energy?Passive or active?
1. With your group-mates, read about the different ways people are using solar power to take care of their energy needs.
2. For each example discuss whether you think it is active or passive solar energy collection.
3. Answer the questions on your CW
AIM:How does the sun make
energy?Summary…
Do you think you could implement any of these examples where you live?
