Roll or Slide for Kids: How Shapes Move on a Ramp (Kindergarten Science)

Hi, I'm Luna from DoodleBeez. If you put things on a ramp, some roll and some slide. Today we will find out why, and test lots of objects to see how they move.

Things that are round all the way around roll. A ball rolls in any direction. Round shapes have no flat sides to stop them, so they keep turning as they move.

Things with flat sides slide. A block, a book or a box slides down a ramp. Its flat side stays touching the ramp the whole time. It does not turn over and over.

Some objects can do both! A can or a crayon is round on its sides but flat on its ends. Lay it on its side and it rolls. Stand it on its end and it slides.

Rolling and sliding both need a push or a pull to get started. On a ramp, the pull of gravity does the job. A harder push makes an object move faster and farther.

Ramps can change how things move. A steeper ramp makes objects go faster. A bumpy or sticky ramp slows them down. Smooth ramps let things slide more easily.

Now it's your turn. Will a toy car wheel roll or slide down a ramp? Pause and try. It rolls! A wheel is round, so it turns as it moves down the ramp.

Great job! Remember, round things roll, flat things slide, and some things can do both. A push or pull gets them moving. Practice rolling and sliding in the Science Lab at doodlebeez.com. See you next time!