Construct an argument using evidence to support the claim that fields (i.e., magnetic fields, gravitational fields, and electric fields) exist between objects exerting forces on each other even when the objects are not in contact.
Plan and carry out investigations to demonstrate the distribution of charge in conductors and insulators. (Clarification statement: Include conduction, induction, and friction.)
Plan and carry out investigations to identify the factors (e.g., distance between objects, magnetic force produced by an electromagnet with varying number of wire turns, varying number or size of dry cells, and varying size of iron core) that affect the strength of electric and magnetic forces. (Clarification statement: Including, but not limited to, generators or motors.)
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Q 1/18
Score 0
Which of the following phenomena BEST supports the claim that fields exist between objects exerting forces on each other without being in contact?
30
Pushing a door to open it
A ball rolling downhill
A dog pulling on its leash
A magnet attracting iron filings across a gap
Q 2/18
Score 0
What evidence supports the claim that gravitational fields exist between objects?
30
A fan blowing air across the room
Earth's gravitational pull causing objects to fall when dropped
Boiling water turning into steam
A battery powering a flashlight
18 questions
Q.
Which of the following phenomena BEST supports the claim that fields exist between objects exerting forces on each other without being in contact?
1
30 sec
S8P5a
Q.
What evidence supports the claim that gravitational fields exist between objects?
2
30 sec
S8P5a
Q.
Which of the following is an example of an electric field acting between two objects?
3
30 sec
S8P5a
Q.
Which scenario best illustrates the concept of a gravitational field acting between two objects?
4
30 sec
S8P5a
Q.
What demonstrates that electric fields can exert forces across a distance?
5
30 sec
S8P5a
Q.
Which example best illustrates a magnetic field acting on an object from a distance?
6
30 sec
S8P5a
Q.
How do electric fields illustrate the concept that forces can act between objects without direct contact?
7
30 sec
S8P5a
Q.
Which of the following demonstrates the action of magnetic fields on an object at a distance?
8
30 sec
S8P5a
Q.
How does a neutral object become charged by induction?
9
30 sec
S8P5b
Q.
Which of the following materials will NOT conduct electricity?
10
30 sec
S8P5b
Q.
What process involves transferring charge by touching a neutral object with a charged object?
11
30 sec
S8P5b
Q.
Which method is used to charge objects without direct contact between them?
12
30 sec
S8P5b
Q.
What happens to the electrons when an object is charged by friction?
13
30 sec
S8P5b
Q.
Which of the following best explains why metals are good conductors of electricity?
14
30 sec
S8P5b
Q.
How can the strength of electric forces between two charged objects be reduced?
15
30 sec
S8P5c
Q.
What effect does decreasing the distance between two magnets have on the magnetic force between them?
16
30 sec
S8P5c
Q.
What factor increases the magnetic force produced by an electromagnet?
17
30 sec
S8P5c
Q.
What happens to the magnetic force of an electromagnet when the size of its iron core is increased?
