Science Chapter F3- Forces and Motion

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1.
1 point
________ is a push or a pull.
2.
1 point
A change in position is called
_____.
3.
1 point
When a force moves an object, scientists say that
____ is done.
4.
1 point
The measure of how fast something moves over a certain distance is _____.
5.
1 point
The force that pulls objects toward each other is called ______.
6.
1 point
_______ is a measure of the pull of gravity on an object.
7.
1 point
A tool that helps people do work is a
_______.
8.
1 point
A flat surface that is higher on one end than the other
is an ______.
9.
1 point
A bar that moves on or around a fixed point is a_____.
10.
1 point
It takes more force to move a basketball than a feather because the basketball has more _____.
11.
1 point
Airplanes travel faster than cars. Airpllanes move at a greaterĀ­ _________.
12.
1 point
People would weigh more on Jupiter than they do on
Earth, so Jupiter must have more __________.
13.
1 point
Which is NOT work?
14.
1 point
Work is measured in ___________.
15.
1 point
Which thing is a compound machine?
16.
1 point
What type of simple machine is an ax?
17.
1 point
What type of simple machine is a seesaw?
18.
1 point
What type of simple machine is a ramp?
19.
1 point
What type of simple machine is a lid on a jar?
20.
1 point
What type of simple machine is an door knob?
21.
1 point
You have a treehouse. What simple machine would you use to move some books up to your treehouse?
22.
1 point
Suppose that you try to take the lid off a jar,but the lid is stuck. It won't come off no matter how hard you try. Have you done any work?