WONDER #494: Why Is Ice Slippery?

Question 1 of 3

What makes ice slippery?

1. water
2. oil
3. grease
4. air

Question 2 of 3

What force generates heat whenever two objects slide against each other?

1. gravity
2. momentum
3. friction
4. infinity

Question 3 of 3

One theory of why ice is slippery is that its outermost layer never turns to a what?

1. gas
2. solid
3. liquid
4. all of the above

Check your answers online at https://www.wonderopolis.org/index.php/wonder/why-is-ice-slippery.