Solar/Wind
Fill in the blank:
Solar panels use ______________ to make electricity.
Sunlight
Fill in the blank:
moving water
True or False:
Coal and natural gas are renewable energy sources.
False:
They are nonrenewable.
Fill in the blank:
Nuclear energy ________ atoms to make electricity.
splits
What are our 6 forms of energy?
Mechanical, Radiant, Chemical, Electrical, Nuclear, Thermal
a)What form of energy from the sun is used by solar panels?
b)What form of energy does wind provide to wind turbines?
a) Radiant Energy (sunlight)
b) Mechanical Energy (moving wind)
What form of energy is moving water?
a) Mechanical Energy
What form of energy is coal and natural gas (fossil fuels)?
Chemical energy
What form of energy is splitting an atom in a nuclear power plant?
Nuclear energy
What percent of Earth's surface is covered in water?
71%
a)What is the complete energy transformation for solar power?
b)What is the complete energy transformation for wind power?
a) Radiant-->Electrical
b) Mechanical-->Mechanical-->Electrical
What is the complete energy transformation for water power?
Mechanical--> Mechanical--> Electrical
What is the complete energy transformation for fossil fuels?
Chemical-->Thermal-->Mechanical-->Electrical
What is the complete energy transformation in a nuclear power plant?
Nuclear-->Thermal-->Mechanical-->Electrical
About what percent of the world’s energy comes from fossil fuels?
As of 2022, 80%
A wind turbine produces less electricity on some days than others.
What is the reason for this?
The wind is not blowing as much, wind turbine moves less/not as fast.
What are 2 disadvantages of using hydropower?
-can harm the local environment and the animals who live around it (fish can't swim freely).
-not usable if it is an area that is dry.
What are 2 disadvantages that coal and natural gas have in common?
-both are nonrenewable and cause air pollution (release CO2 in the atmosphere)
What are 2 disadvantages of nuclear power?
-makes dangerous waste that is hard to store safely and there is a risk of accidents that can be deadly.
How long does it take sunlight to reach Earth?
8 minutes and 20 seconds
A school installs solar panels and notices they produce less electricity during certain seasons of the year.
What is the most likely reason?
There is less sunlight (shorter days / lower sun angle) in the fall and winter.
How many people get electricity from the Hoover Dam?
1.3 million people
A state switches from using coal to natural gas for electricity.
What are the advantages of doing this?
-less pollution than coal
-cheaper than coal
What is the name of the 1986 nuclear power plant accident in Ukraine?
Chernobyl disaster
At about what wind speed (mph) do turbines start generating electricity?
7-10 mph