A fundamental property of matter that leads to electromagnetic interactions between particles is
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Question 2
2.
Which of the following particles are found in the nucleus? Choose all that apply.
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Question 3
3.
An atom with an overall charge is called a(n) _____.
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Question 4
4.
An atom with the same number of protons and electrons is neutral (has no overall charge).
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Question 5
5.
The strength of the electric force between two charged objects is determined by the amount of charge on each object and ______.
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Question 6
6.
Like charges attract.
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Question 7
7.
Atoms can become charged when they gain or lose ____.
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Question 8
8.
The balloon has become negatively charged by rubbing it on the sweater. This is an example of redistribution of charge by what method?
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Question 9
9.
The charged rod is brought near the top of the electroscope, which becomes positively charged by
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Question 10
10.
Which of the following statements best explains why the top of the electroscope becomes positively charged when the charged rod is brought near it?
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Question 11
11.
In the picture above, if the balloon is negatively charged, what is the charge on the girl's hair?
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Question 12
12.
The buildup of electric charge on an object is called
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Question 13
13.
The loss of built-up charges from an object is called
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Question 14
14.
Lightning is an example of electric discharge.
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Question 15
15.
The ancient Greeks are said to have discovered a naturally occuring magnetic material in the Earth that they called _____.
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Question 16
16.
Which of the following elements is not ferromagnetic?
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Question 17
17.
The ends of a magnet are called _______.
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Question 18
18.
The magnetic force of a magnet is weakest near the _____.
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Question 19
19.
The area surrounding a magnet where the magnetic force can be detected is called the _______.
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Question 20
20.
Field lines around a magnet always leave the ______ pole and enter the ______ pole.
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Question 21
21.
Where field lines are far apart, the magnetic force is ________.
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Question 22
22.
The strength of the magnetic force that acts between two magnets depends on _____. Choose all that apply.
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Question 23
23.
The mystery object in the picture above is a magnet. Based on the field lines shown, these two magnets will _____.
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Question 24
24.
Based on the field lines in the picture above, the ends of the mystery magnets facing each other must be ______.
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Question 25
25.
_______ can be sprinkled on a clear sheet of plastic that covers a magnet to help us “see” the invisible field lines around a magnet.
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Question 26
26.
A domain is a region within a material in which a group of atoms have the same ________.
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Question 27
27.
A piece of plastic can be turned into a temporary magnet by using a strong magnet to align its domains.
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Question 28
28.
If you were to break a bar magnet in half, you would be left with _____.
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Question 29
29.
Banging or dropping a temporary magnet can cause it to lose or weaken its magnetic field.
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Question 30
30.
An electromagnet is a _______ wrapped in electrical wire that is connected to a power source.
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Question 31
31.
The image on the left shows a ferromagnetic material. The object on the right shows what happens to that ferromagnetic materials when in the presence of a strong magnet.
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Question 32
32.
Scientists believe that the Earth's magnetic field is caused by charged particles that swirl around inside Earth's _____.
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Question 33
33.
Your friend, Billy, attaches a magnet to a string and allows it to hang freely. He discoves that the north pole of that magnet always turns and points toward the north pole of Earth. Billy turns to you and says, "I thought like poles repel! Why is the north side of my magnet pointing north?!" Explain to Billy what is happening and why he, and probably many other people, are confused by this phenomenon.
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Question 34
34.
Auroras are created when ______ from the sun is/are guided by Earth's magnetic field.
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Question 35
35.
An aurora is a beautiful display of light that can only be seen near the north pole.
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Question 36
36.
The interaction between electricity and magnetism is called _____.
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Question 37
37.
What kind of device is shown in the picture above?
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Question 38
38.
List three changes you could make to the above device that would increase the strength of the magnetic field around the nail.
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Question 39
39.
What do we call a coil of wire that carries an electric current?
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Question 40
40.
A device that measures the strength and direction of an electric current is a _____.
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Question 41
41.
Hans Oersted discovered that when a current flows through a wire, a(n) _____ is created around the wire.
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Question 42
42.
In the first image, the circuit is open. In the second image, Oersted closes the circuit. If Oersted were to reverse the direction of the current flowing through the wire, the red compass needle would move toward the _____.
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Question 43
43.
Which of the following are advantages that electromagnets have over permanent magnets? Choose all that apply.
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Question 44
44.
The process of using a magnetic field to create an electric current in a wire is called _____.
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Question 45
45.
Which of the following would reverse the current in the wire? Choose all that apply.
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Question 46
46.
In the diagram of the generator above, a crank can be used to turn the coil of wire within the magnets. In power plants, instead of a crank, a turbine is used to turn the coil of wire within the magnets. Which of the following are used to turn the turbine in power plant generators? Choose all that apply.
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Question 47
47.
A generator, like the one pictured above, converts...