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Science 8 Midterm

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1.
5 points
Device that changes the voltage of an alternating current.
2.
5 points
Thousands of years ago, people discovered _______________.
3.
5 points
Applying the brakes uses _______________ to slow a vehicle down.
4.
5 points
A battery produces current electricity from ______________
5.
5 points
What is the measurement of acceleration?
6.
5 points
If an object loses electrons, the object will have a __________ charge.
7.
5 points
What is the measurement of time?
8.
5 points
The gravitational force of any object near Earth’s surface is _____________________.
9.
5 points
When you rub a balloon on your hair, __________ go from your hair to the balloon.
10.
5 points
___________________ is an example of a good electrical insulator.
11.
5 points
A measure of the potential energy available in a complete circuit is ____________
12.
5 points
While static friction keeps and object at rest, ______________ friction slows down an object that slides.
13.
5 points
You hit a wall with a stick. The equal but opposite reaction is __________________.
14.
5 points
Current that changes direction is called ___________________.
15.
5 points
What is the measurement of velocity?
16.
5 points
A ___________ force is the total force felt by an object.
17.
5 points
A group of atoms with aligned magnetic poles.
18.
5 points
What is the measurement of momentum?
19.
5 points
What is the measurement of mass?
20.
5 points
Earth's magnetic field is called__________________
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