WorksheetsInvisible Forces Assessment
Total questions: 10
Worksheet time: 8mins
Name
Class
Date
1.
Why do hoppers hop off the table?
a)
Hoppers hop off the table because of the rubber band.
b)
Hoppers hop off the table because of the cardboard.
c)
Hoppers hop off the table because the hopper is flat.
d)
Hoppers hop off the table because of the push.
2.
Why are pillar bridges and arch bridges stronger than board bridges?
a)
Board bridges have a lot of structure.
b)
The force of people and cars pushes down on bridges. Pillars and arches push up from below to balance the downward push.
c)
Board bridges are made of structurally sound materials.
d)
The push and pull on a pillar bridge is similar to the forces of a board bridge.
3.
Which bridge is the strongest?
a)
Pillar
b)
Arch
c)
Board
d)
Pillar and arch
4.
Why is it hard to win a tug-0-war against an elephant?
a)
Elephants try really hard
b)
Elephants have more legs than we do
c)
Elephants have a lot of friction
d)
Elephants can push really hard
5.
The last rubber band caused the watermelon to burst because ________?
a)
It was stronger than all of the other rubber bands?
b)
It was thicker than the other rubber bands
c)
It was the last rubber band in the bag
d)
It created a force that was greater than the force of the watermelon rind
6.
When you look at a smooth surface under a powerful microscope, what does it look like? (Think of the sandpaper when we made slides)
a)
It looks completely smooth.
b)
It might have a few bumps, but it mostly looks really smooth.
c)
It looks smooth and wavy.
d)
It looks really jaggedy.
7.
Why was the suspension bridge a good design for the Golden Gate Bridge in San Francisco?
a)
Ships had to pass underneath the bridge.
b)
It has a lot of pillars underneath to support it.
c)
The distance the bridge had to cross wasn't very long.
d)
The water under the bridge was very shallow.
8.
Sandpaper sliders don't slide very fast because _______
a)
sand makes the slider too heavy
b)
sandpaper creates a lot of friction
c)
it didn't have enough pennies on it
d)
the slide isn't long enough
9.
Magnets attract
a)
objects that contain iron
b)
only other magnets
c)
anything made of metal
d)
things that are not too heavy
10.
The opposite sides of magnets are called
a)
North and south poles
b)
East and west poles
c)
Top and bottom
d)
attract and repel
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