Download Types of Interactions Study Guide

Types of Interactions Study Guide
Name_____________________________
8th Grade PSI
Multiple Choice- Choose the best answer. Justify each answer in the space provided
below.
1. Which of the following is NOT an example of a force being exerted through a field?
a.
b.
c.
d.
Gravity pulling on a falling apple
A man pushing a car
A magnet attracting a steel ball
An electrically charged balloon pushing on another balloon from across the
room
2. Unbalanced forces acting on an object will cause it to accelerate (change velocity).
True
False
3. The force of gravity _________ as the object's mass decreases.
a. increases
b. remains constant
c. decreases
4. The force of gravity _________ as the distance between two objects decreases.
a. increases
b. remains Constant
c. decreases
5. The force of gravity decreases at a constant rate as we move away from a planet
like Jupiter.
True
False
6. As we move away from the Sun, the force of gravity gets weaker by an inverse of:
a. distance cubed
b. distance
c. distance squared
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8th Grade PSI
Types of interactions
7. What makes a balloon exhibit an overall positive charge?
a.
b.
c.
d.
equal protons and electrons in the object
more electrons than protons in the object
more protons than electrons in the object
less electrons in the object
8. What makes an object exhibit an overall negative charge?
a.
b.
c.
d.
equal protons and electrons in the object
more electrons than protons in the object
more protons than electrons in the object
less electrons in the object
9. What makes an object exhibit an overall neutral charge?
a.
b.
c.
d.
equal protons and electrons in the object
more electrons than protons in the object
more protons than electrons in the object
less electrons in the object
10. Opposite charges repel.
True
False
11. Like charges attract.
True
False
12. As the amount of charge decreases, the electric force between the charges
__________.
a. decreases
b. stays the same
c. increases
13. As the amount of distance between charges decreases, the electric force between
the charges:
a. decreases
b. stays the same
c. increases
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8th Grade PSI
Types of interactions
14. Electric field lines exit positive charges and enter negative charges.
True
False
15. The electric field strength between two parallel oppositely charged plates:
a. Increases as you move towards the positive plate
b. decreases as you move toward the negative plate
c. remains constant at all points between the plates.
16. William Gilbert was the scientist who discovered that the Earth was a giant magnet.
True
False
17. Microscopic regions inside iron are called:
a. magnetic crystals
b. magnetic domains
c. magnetic atoms
18. Ferromagnetic substances include: (select all that are ferromagnetic)
a.
b.
c.
d.
iron
aluminum
nickel
cobalt
19. An electromagnet produces a magnetic field when current flows through it.
True
False
20. Soft Iron is an example of a(an):
a.
b.
c.
d.
Electromagnet
Temporary magnet
Permanent magnet
Superconductor
21. Like magnetic poles:
a. attract
b. repel
c. don't interact
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8th Grade PSI
Types of interactions
22. This type of field drawing represents:
a. attraction
b. repulsion
c. suspension
23. A test compass at A will be oriented like:
A
24. A test compass at B will orient itself like:
A
B
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8th Grade PSI
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25. Magnetic field lines exit from the south pole of a magnet.
True
False
26. As the distance from a magnetic field source is increased, the magnetic field
intensity will:
a. Increase
b. Decrease
c. Stay the same
27. Moving electric charges (electric current) cause a magnetic field to form.
True
False
28. The __________ rule is the rule that relates the direction of a magnetic field
surrounding a wire carrying current.
a.
b.
c.
d.
left thumb
right hand
right arm
left hand
29. The father of modern electromagnetic theory is:
a.
b.
c.
d.
Albert Einstein
Sir Isaac Newton
Michael Faraday
Michael Bolton
30. The ________ rule is used to determine the direction of the magnetic field around
a current carrying coil of wire.
a.
b.
c.
d.
right hand
left hand
right thumb
left thumb
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8th Grade PSI
Types of interactions
Free Response:
31. List the three types of fields discussed in this chapter. What factors affect the
strength of each type of field?
32. How can a) a mass, b) a positive charge, and c) a compass be used as field
detectors?
33. Explain the process of induction.
34. How do electric field diagrams and magnetic field diagrams compare to each other
for attraction/repulsion? Explain your answer in a short paragraph.
35. How is Coulomb's Law (forces between charges) similar/different to Newton's Law
of Gravitation (forces between masses)?
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8th Grade PSI
Types of interactions
36. Sort the terms below to into the Newton's Law of Gravitation or Coulomb's Law.
If they are used for both Laws place the term on the line.
Newton's Law
of Gravitation
Coulomb's
Law
Mass
Attraction
Charge
Field
Repulsion
As distance increases force drops
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8th Grade PSI
Types of interactions