Invisible Forces - Unit Assessment

1. Why is it hard to win a tug-of-war against a group of teachers?

• Teachers try really hard.
• Teachers have more legs than students.
• Teachers have a lot of friction.
• Teachers can push really hard.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

2. The last rubber band caused the watermelon to burst because _________.

• it was stronger than 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.

Tags

NGSS.MS-PS2-2

3. Why was a 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

Tags

NGSS.MS-ETS1-1

4. A trapeze won’t swing forever because ___________.

• a trapeze is too heavy to keep swinging.
• friction and air resistance slow the trapeze down.
• a trapeze isn’t heavy enough to keep swinging.
• the ropes of the trapeze aren’t long enough.

Tags

NGSS.MS-PS2-2

5. Magnets attract _____________.

• objects that contain iron.
• only other magnets.
• anything made of metal.
• things that are not too heavy.

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

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2