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Lesson 1
Lesson 2
Lesson 3
Vocabulary
Random
100
position or location
What do words such as behind and above describe about an object?
100
force
_________ a push or a pull
100
All objects are pulled toward each other by gravity
What is the low of gravity?
100
a force that pulls objects toward earth.
What is gravity?
100
It will move faster
What happens if you push a moving swing hard?
200
My position changes when I move from my desk to the front of the classroom.
What is an example of a way your position changes when you move?
200
an object with more mass needs more force to move.
How does an object mass affect its motion?
200
weight is the measure of the pull of gravity on an object. Mass is the amount of matter in an object.
What is the difference between weight and mass?
200
The amount of matter an object has
What is mass?
200
its position changes
How do you know when an object is in motion?
300
variable speed changes speed. Constant speed stays the same.
What is difference between a variable speed and a constant speed?
300
A push or pull
What force is needed to move an object?
300
I could throw an apple in the air and watch it fall back to earth.
How could you show that gravity affects an apple?
300
a contract forcw that opposes the motion of an object.
What is friction?
300
location
Which word means the same as position?
400
It will have a variable speed when starting or stopping.
When might a bicycle have a variable speed?
400
position or direction
What are two things a force can change about an object?
400
Because it can affect an object without touching it.
Why gravity is noncontract force?
400
the location of an object
What is position?
400
Forces are balanced when there is no change in motion
How do you know when forces are balanced?
500
Speed is how fast an object changes position.
What is the definition of speed?
500
It slows down or stops motion
How does friction affect motion?
500
I can overcome the pull of gravity when I pick up a toy off the floor.
Give an example of how gravity can be overcome.
500
the rate at which an object changes position
What is speed?
500
They have to act in opposite directions.
Two forces have the same amount of push on an object. How can they balanced forces?