Collisions and mass Review

A meeting or touching of surfaces is called ___________.

• energy

• contact

• force

A change in an object's position over time and in comparison to other objects is called _______________.

• energy

• force

• motion

A push or pull that causes an object to move, stop, or change direction is called a ______________>

• force

• motion

• contact

That which is needed to do work is called ________________.

• force

• pull

• energy

The rate of motion or how fast something goes is called ___________.

• force

• motion

• speed

The energy an object has because it is moving is called ______________________

• potential energy

• kinetic energy

• force

The energy that is stored inside an object is called ___________.

• potential energy

• kinetic energy

• motion

When two objects collide, what will happen?

• both with move in the same direction

• both will move in the opposite direction

• both will stop

When two objects collide their motion changes. Why does this happen?

• energy was transferred from one object to the other

• their gravity changed

• the objects lose mass

Students are interested in how marbles can collide. The decide to roll them on a flat surface and make them collide. What observation will be important for the students in their investigation?

• how the marbles are moving before they collide

• the colors of the marbles

• the exact length and width of the surface the marbles are rolled on