Invisible Forces Science Unit

Why is it hard for students to beat teachers in tug-of-war?

• Teachers try harder

• Teachers have more legs than students

• Teachers have more friction

• Teachers can push down harder

Tags

NGSS.MS-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 created a force that was stronger than the rind

• it was the last rubber band in the bag

Tags

NGSS.MS-PS2-2

Pushes and pulls are

• friction

• forces

• magnets

• strong

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Why was a suspension bridge design used for the Golden Gate Bridge?

• Ships had to pass underneath it

• It has a lot of pillars to support it

• The distance from end to end wasn't very long

• The water under the bridge was shallow

What type of bridge is the Mackinaw Bridge in Michigan?

• Arch

• Pillar

• Suspension

• Troll

Which slider had the MOST friction?

• sandpaper

• plastic button

• quarter

• cardboard

Friction is the force that...

• speeds you up

• slows you down

• holds you to Earth

• makes a slide fun

Tags

NGSS.3-PS2-1

Sir Isaac Newton discovered

• gravity

• apples

• math

• stars

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

NGSS.MS-PS2-5

What would have the most friction?

• Running in soft sand

• Riding a bike on the sidewalk

• Going down a hill on a sled

• Going down a slide in sports leggings

Magnets attract

• only other magnets

• anything made of metal

• objects that contain iron

• things that aren't too heavy