The change in one object´s position compared with another object´s position is called _______ motion .

A place or an object to determine if an object is in motion is called ________ point .

Any push or pull is a _________ .

Some forces act only when they are in _________ .

A contact force must touch an object to _______ it .

Pushing or ________ can change both the position and motion of an object .

All forces have size and __________ .

A force can cause a change in ______ in an object .

Balanced forces that act in opposite direction ______ each other .

The force that pulls an object toward each other is called _________ .

_____ measures how much matter is in an object .

_________ measures how strong the force of gravity is on an object .

The rate at which an object changes position is called _________ .

Some objects change speed and __________ .

__________ combines both the speed and the direction an object is moving .

Objects move in straight lines, in ______ paths, or back and forth .

The mass of an object affects the force needed to change its ________ .

The force of gravity pulls objects to _______ .

To get the average speed of an object you should divide the total distance by the total _______ .