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100
Moving parts in machinery are coated in oil and grease to reduce this.
What is Friction?
100

This force causes a leaf to fall more slowly than a coin.

What is air resistance?

100
The rate of change in the velocity of an object is called this.
What is Acceleration?
100

This device is used to measure mass 

What is a triple beam balance?

100

This law states that an object will maintain its state of motion until disturbed

What is Newton's First Law of Motion?

200
This is happening to an object when it has negative acceleration.
What is slowing down?
200
The force of gravity acts on an object that has this.
What is Mass?
200
This is the speed of an object in a specific direction.
What is Velocity?
200

the force of gravity pulling on an object is called this

What is Weight?

200

According to the first law of motion, an object needs to be acted upon by ___ in order to change state of motion

What is an unbalanced force?

300
In absence of acceleration, a moving object has a constant this.
What is Speed?
300
When the only force acting on an object is gravity, the object is in this.
What is Freefall?
300
An object traveling at a constant speed in a circular path is changing this.
What is Velocity?
300
The force that pull a falling leaf towards earth is called this.
What is Gravity?
300

This scientific ____ describes something we see in the world but does not explain it

What is a scientific law?

400
The force exerted by a surface that opposes an object's effort to move across it is this.
What is Friction force?
400
The tendency of an object to resist a change in its motion is known as this.
What is Inertia?
400

This is the distance traveled by an object divided by the time taken.

What is speed?

400

When you are using force on an object it is called

What is Applied force or exerted force?

400

According to the first law of motion, this will happen to an object with no forces acting on it.

What is nothing?

500
This happens to an object when it has positive acceleration.
What is speeding up?
500
A push or a pull exerted on an object is called this.
What is Force?
500
This is the measure of the amount of an object's matter.
What is Mass?
500

A rough surface has more of this than a smooth surface

What is friction?

500

According to the first law of motion, an object in motion will do this

What is stay in motion?

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