1
_____ is the pushing or pulling force caused by a magnet.
What is magnetism?
____ is a force that slows or stops motion.
What is friction?
The force that pulls objects toward the center of the earth.
What is gravity?
The measure of the force of gravity on an object is called ______.
What is weight?
A change of position.
What is motion?
One kind of invisible force that pulls you down.
What is gravity?
Objects cannot move unless something causes them to move.
What is a force?
When a force moves something, we say that ____ is done.
What is work?
Simple machines make work ____.
What is easier?
Energy can _____ from one form to another
What is change?
A tractor plowed the field.
What is a machine?
The cornstalks blew in the field.
What is the wind?
The field workers picked corn.
What are people?
The watermill ground the corn.
What is the water?
The oxen pulled the wagon loaded with corn.
What are animals?
Photosynthesis
What is light energy?
light bulb
What is electrical energy?
burning gasoline in a truck
What is chemical energy?
riding a bicycle
What is mechanical energy?
battery in a camera
What is stored energy?
ringing a bell
What is sound energy?
force
What is a push or pull?
the direction it travels, the distance it travels, and the speed it travels
What is the motion of an object?
gravity, friction, and magnetism
What are three invisible forces?
The scarecrow's clothes blew around his straw face.
What is wind?