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Invisible Forces Assessment

Authored by Cindy Phelan

Other Sciences

3rd Grade - University

Used 30+ times

Invisible Forces Assessment
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why do hoppers hop off the table?

Hoppers hop off the table because of the rubber band. 
Hoppers hop off the table because of the cardboard.
Hoppers hop off the table because the hopper is flat.
Hoppers hop off the table because of the push.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Why are pillar bridges and arch bridges stronger than board bridges?
                                                                             

Board bridges have a lot of structure.
The force of people and cars pushes down on bridges.  Pillars and arches push up from below to balance the downward push.
Board bridges are made of structurally sound materials.
The push and pull on a pillar bridge is similar to the forces of a board bridge.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Which bridge is the strongest?

Pillar
Arch
Board
Pillar and arch

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Why is it hard to win a tug-0-war against an elephant?

Elephants try really hard
Elephants have more legs than we do
Elephants have a lot of friction
Elephants can push really hard

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

The last rubber band caused the watermelon to burst because ________?

It was stronger than all of the other rubber bands? 
It was thicker than the other rubber bands
It was the last rubber band in the bag
It created a force that was greater than the force of the watermelon rind

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When you look at a smooth surface under a powerful microscope, what does it look like?  (Think of the sandpaper when we made slides)

It looks completely smooth. 
It might have a few bumps, but it mostly looks really smooth.
It looks smooth and wavy.
It looks really jaggedy.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why was the suspension bridge a good design for the Golden Gate Bridge in San Francisco? 

Ships had to pass underneath the bridge.
It has a lot of pillars underneath to support it.
The distance the bridge had to cross wasn't very long.
The water under the bridge was very shallow.

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