What do the words "advantage" and "disadvantage" mean?
Advantage is a positive effect, and disadvantage is a negative effect.
100
What are the 2 main categories of non renewable resources?
Fossil fuels and nuclear energy.
100
What are the 3 renewable resources we learned about?
Wind power, solar power, water power
100
What is genetic mutation?
It's when the radioactive waste goes into our cells and changes our DNA. You can end up with a "mutation," which is like a deformity, such as an extra arm or leg.
200
What energy transformation occurs when a candle gets lit?
______ --> ______ + _______
Chemical --> radiant + thermal
200
What is nuclear energy?
Energy stored in the nucleus of an atom. The atom must split apart for the energy to be released.
200
What are the 2 negative effects of nuclear energy that are not effects of fossil fuels? Why are they so bad?
noisy, require large areas of land, can kill flying animals, power 9000 homes.
200
What is the name of the machine that uses wind energy? What form of energy do these machines make? How many homes can it power
Wind turbines, or windmills, make electrical energy. About 9000 homes (small town).
300
When the boy releases the arrow, the amount of kinetic energy increases, and the amount of potential energy decreases. What happens to the total amount of energy?
It stays the same.
300
What are fossil fuels?
They are made from prehistorical plants and animals. Over time, the plants and animals were squished down and changed into 3 different fuel forms.
300
What are 2 important ways pollution travels?
The wind can blow it around, and the water can spread it.
300
What are the advantages of using renewable resources?
Advantages: They won't run out. They create almost no pollution at all.
300
What is the name of the device that uses water power? What are the disadvantages? How many homes can it power?
A water dam (or hydroelectric dam) can harm water animals because they can make the water colder and stop the flow of nutrients. It can power a whole city.
400
Which energy transformations are shown in the diagram of the sun --> solar cells --> a fan and radio
light --> electricity--> mechanical + sound
400
What is the difference between renewable and nonrenewable resources? (Difference in definitions)
Renewable resources are sources of energy that can be used over and over again. Nonrenewable resources are being used faster than they can be made. You can only use them one time.
400
What are 5 negative effects of fossil fuels?
air pollution/C02, contaminated drinking water, oil spills, plants and animals die, people and animals get sick, cancer, global warming, we will run out eventually.
400
Compare and contrast solar cells and thermal collectors. Hint: Think about how they work and what they're used for
same: use energy from the sun. solar cell: is for generating electricity. thermal: Uses thermal energy from the sun, is for heating homes and water.
400
Compare and Contrast nuclear energy and fossil fuels
They are both non renewable. They are both used in power plants to make electricity. Fossil fuels are made of dead plants and animals. Fossil fuels create much more pollution than nuclear energy. Nuclear energy creates radioactive waste which can cause cancer and genetic mutation.
500
Where does the ball have the most potential energy?
Where does it have the most kinetic energy?
How do you know?
It has the most potential energy at position A, and the most kinetic energy at position B. Potential energy depends on height, and position A is the highest and not moving.
When we saw the picture of the ball falling off a brick building, it showed that the ball has the most kinetic energy right before it hits the ground.
500
What is hydraulic fracturing?
When you use water and chemicals to break the earth in order to get natural gas out.
500
People say we are running out of coal, oil, and natural gas. Why can't we just make more?
Coal, oil, and natural gas all take thousands of years to make. After plants and animals die, they slowly sink into the earth and get covered in layers of rocks. The earth's pressure and heat turn them into fossil fuels over a very long period of time. (Think of the word FOSSIL to help you remember this answer.)
500
Draw a picture of a wind turbine and show how it works. Use as much detail in your description of how it works as possible.
The wind makes the turbines spin around. The moving turbines make the generate transfer the mechanical energy into electrical energy. The electrical energy moves down the shaft to power lines underground.
500
What are the names of the devices that use solar power? What are the disadvantages?
thermal collectors and solar cells are expensive, don't work as well when the sun is not shining.