A change in an object's position compared to another object's fixed position is __________________.
What is relative motion
100
Any push or pull is ____________.
What is force
100
Any change in the speed or direction of an object's motion is _________________.
What is acceleration
100
The force that makes objects pull toward each other is known as _____________.
What is gravity
100
The energy of motion is ______________.
What is kinetic
200
The objects you use to decide if something is moving are you ____________ of ____________.
What is frame; reference
200
Force can make an object __________or __________ moving.
What is start; stop
200
A force that acts when 2 surfaces rub together is known as _____________.
What is friction
200
The ability to move something is ____________.
What is work
200
Stored energy is known as ________________.
What is potential
300
The rate at which an object changes position is __________________.
What is speed
300
A ___________ can change the ___________ and the ___________ of an object.
What is force; position; motion
300
A moving object will not change ___________ or __________ unless the forces acting on it change.
What is direction; speed
300
The force of __________ is stronger when objects are ________ together.
What is gravity; close
300
What are two ways a roller coaster can accelerate?
What is as it moves up a hill because it changes speed, and on a curved path because it changes direction
400
The speed and direction an object is moving is its _______________.
What is velocity
400
All forces have both ___________ and ____________.
What is size; direction
400
Friction can _________ or __________ moving objects.
What is slow; stop
400
_____________energy can change to ____________ energy, and vice versa.
What is potential; kinetic
400
Describe how different objects move, depending on force.
What is amount of force acting on an object affects how the object changes speed and direction; more force is needed for heavy objects; or the faster you do something the faster it moves
500
Objects can move in a ______________ line, a ___________ path, or move __________ and _________.
What is straight; curved; back; forth
500
The _______________ an object has to any change to its motion is called ____________.
What is resistance; inertia
500
Direction can be described by using different words such as ____________, _____________, _________, ____________, ____________, ____________, _____________, and ______________.
What is north; south; east; west; up; down; right; left
500
What are 2 factors that affect the force of gravity between 2 objects?
What is the closer the objects are the stronger the gravity; the farther apart objects are the force becomes weaker; stronger force also for massive objects compared to smaller objects
500
How is does energy change in a toy bird?
What is as you wind the toy bird you are storing up potential energy, as you let it go the potential energy changes to kinetic energy