Invisible Forces

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

• Teachers try really hard.

• Teachers have more legs.

• Teachers have a lot of friction.

• Teachers can push really hard.

Push or a pull? THROW.

• Push

• Pull

Tags

NGSS.K-PS2-1

NGSS.K-PS2-2

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

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

• ships had to pass underneath he 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

Push or a pull? STOMP.

• Push

• Pull

Tags

NGSS.3-PS2-1

Sandpaper sliders don’t slide very fast because _____________.

• sand makes the slider too heavy

• sandpaper creates a lot of friction

• it did not have enough pennies on it

• the slide was not long enough

Tags

NGSS.MS-PS2-2

Push or a pull? TOW.

• Push

• Pull

Tags

NGSS.MS-PS2-1

Magnets attract ________

• objects that contain iron

• only other magnets

• anything made of metal

• things that are not too heavy

Why did the hoppers we made in class hop off the table?

• They have magic.

• They are alive.

• Hoppers hop off of the table because of the rubber band.

• Friction

Tags

NGSS.MS-PS2-2

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

• They use forces.

• They have support underneath them.

• I don't know.

• They are stronger.

Tags

NGSS.MS-ETS1-2