1
What is a change of position called?
Motion
What kind of energy is needed for photosynthesis?
Light
Name three invisible forces.
Gravity, friction, magnetism.
What kind of energy is needed for a light bulb?
Electrical
A tractor plowed the field. What is doing the work?
Machine
Energy can _____________ from one form to another.
Change
Objects cannot move unless something causes them to move. What causes an object to move?
Force
What kind of energy is needed for burning gasoline in a truck?
Chemical
What is weight?
The measure of the force of gravity on an object.
The cornstalks blew in the field. What is doing the work?
Wind
What is magnetism?
The pushing or pulling force caused by a magnet.
What kind of energy is needed for riding a bicycle?
Mechanical
A force that slows or stops motion.
When a force moves something, what is being done?
Work
The field workers picked corn. What is doing the work?
People
What are three ways to describe the motion of an object?
Direction, distance, and speed the object travels.
What is gravity?
The force that pulls objects toward the center of the earth.
How do simple machines effect work?
They make work easier.
What is a force?
A push or pull on an object.
The watermill ground the corn. What is doing the work?
Water
What kind of energy is needed for the battery in a camera?
Stored
What is energy needed to do?
To cause change and do work.
What kind of energy is needed for ringing a bell?
Sound
What are the six kinds of energy?
Chemical, electrical, mechanical, light, sound, stored
The oxen pulled the wagon loaded with corn. What is doing the work?
Animal