Energy cannot be created out of nothing, nor can it be completely destroyed. Energy can only change its form.

a reaction force that pushes an object forward

The amount of energy that is stored in an object is its kinetic energy.

to use a tool to learn more about the volume, length or weight of an object

a pull or push that is applied to an object

the amount of matter in an object

an object's mass divided by its volume

a change in the position of an object compared to another object