Magnets and forces

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

• a. Teachers try really hard.

• c. Teachers have a lot of friction.

• d. Teachers can push really hard.

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

• a. it was stronger than 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.

Tags

NGSS.MS-PS2-2

3. Why was a 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.

4. 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.

Tags

NGSS.MS-PS2-2

5. Magnets attract _____________.

• a. objects that contain iron.

• b. only other magnets.

• c. anything made of metal.

• d. things that are not too heavy.

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

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3