2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Vocabulary Electricity Magnets and Energy Potpourri

A material that lets electricity travel through it easily

conductor

Energy an object has because of its position or condition

Potential energy

An electrical charge that builds up in an object

Static electricity

An object that attracts iron

magnet

A path that has more than one way an electric current can flow

Parallel circuit

The energy of motion

Kinetic energy

A machine that produces electric current

generator

A temporary magnet

electromagnet

A machine with few or no moving parts, to which only one force is applied

Simple machine

A bar that pivots on a fixed point

lever

What is the name of a path that has only one way for the current to flow?

Series Circuit

Which is a good conductor of electricity? A.Copper B. Glass C. Plastic D. rubber

Copper

What is a stream of electrons moving through a copper wire called?

Current electricity

Ryan wants to build a small electric generator. What two items must he have to make his generator?

Coil of wire and magnet

What is the difference between a series circuit and a parallel circuit?

A parallel circuit there is more than one path for electrons to follow. A series circuit has only one path for the current to follow.

A magnet will hold papers to a refrigerator, but papers are not attracted to a magnet. What can be concluded about the refrigerator, the magnet, and the papers?

Magnetic forces pass from the magnet, through the papers, to the refrigerator

What is stored in the bonds that hold compounds together?

Chemical energy

What kind of energy is also called energy of position?

potential

Suppose you are testing the strength of an electromagnet. You are changing the number of loops of wire. You are measuring how many paper clips the electromagnet can pick up. Describe a table that you would use to record the data.

You would come up with a two column table with headings “Loops” and “Paper Clips Picked Up”

Aastha and her family visited a large dam, where they were told that the kinetic energy of falling water was changed to electrical energy. What kind of power did this dam produce? a.Chemical energy b. Solar power c. Geothermal energy d.Hydroelectric power

Hydroelectric power

Batteries supply a stream of electrons to power toys and electronics. When some batteries wear out, they can be recharged. Explain how this might be possible.

Electrons move from one place in a battery, through the toy or other device, to another place in the battery. The direction of electron flow is reversed to recharge a battery.

Offices, homes, and factories each use about the same amount of electricity. If you made a pie graph to compare the amounts used, what fraction of the graph would be labeled for each user?

Each fraction would be the same, one-third

Screws have threads that are simple machines. What kind of machine are the threads on screws? a.Blades b. inclined planes c. Fulcrums d. wedges

Inclined planes

Where does food first begin to be digested?

mouth

What helps food become digested in the stomache?

Stomache enzymes