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What are three ways to describe the motion of an object?
the direction it travels, the distance it travels, and the speed it travels
What are three kinds of invisible forces?
friction, gravity, magnetism
The force that pulls objects toward the center of the earth is called
gravity
A force that slows or stops motion is called
friction
A pushing or pulling force caused by a magnet is called
magnetism
The measure of the force of gravity on an object is called
weight
A change of position is called
motion
What kind of energy is a light bulb?
electrical energy
What kind of energy is riding a bicycle?
mechanical
what kind of energy is ringing a bell?
sound energy
what kind of energy is photosynthesis?
light energy
What kind of energy is the battery in a phone?
stored energy
What forces slows or stops motion?
friction
What is weight?
the measure of the force of gravity on an object
What force causes an object to fall?
gravity
What are simple machines?
the basic tools that make work easier
