Energy Transfers Flashcards
Energy is a concept that describes:
work or changes
Food energy is an example of what type of energy?
chemical energy
If you wanted to design an investigation to test a ring magnet for its strongest part, what would be the question for you investigation?
What part of a ring magnet is the strongest?
What materials would you need for you investigation to find the strongest part of a ring magnet?
one ring magnet, box of paperclips
If all parts of the magnet had about the same number of paper clips, what conclusion could you draw?
The data collected did not show a stronger or weaker part of the magnet.
How could prove that a glass bar does not conduct electricity, but a metal bar does?
Place the glass bar in between two wires of a circuit and see if the lightbulb will light. Then repeat with the metal bar.
Lukas has a battery powered hex bug. What energy changes (or transfers) propel the hex bug?
chemical to electrical to mechanical
Kim’s family uses a hot air popper that heats air and blows the hot air on the popcorn kernels to make them pop. What form of energy makes the popcorn popper operate?
Electrical energy, because electrical current is used to heat the air and run the fan.
Lilly melted some butter in a pan on the stovetop. What form of energy made the butter melt?
Heat energy
Which of these items will be attracted to a magnet:
rubber band, steel paper clip, copper coin, aluminum can.
Only the steel paperclip because it contains iron.
Lindsay thought all forks were attracted to magnets. She put a magnet next to a plastic fork and a metal fork. What would you expect Lindsay to observe?
Only the steel fork would be attracted to the magnet.
Where is a magnet the strongest?
At the poles (ends).
If you brought a magnet to the beach, you would observe that some of the grains of sand stick to the magnet, but most do not. Why would this happen?
Because some grains of sand contain metals that attract the grains to a magnet.
If you placed a piece of white paper and a piece of black paper in the sun for one hour, what would you observe?
The black paper would have a higher temperature than the white paper (get warmer than the white paper). This is because black paper absorbs more light energy that is then transferred to heat energy.
Why do wires in an electrical circuit get hot?
Electrical energy flowing through the wire produces heat energy.
