Ch. 12 8th Grade Science Quiz Review

The law of inertia states

• any object with mass also has inertia

• objects will remain in their current state unless acted on by a net external force

• for every action force, there is an equal and opposite reaction force

• for every action force, there is an equal and opposite reaction force

Tags

NGSS.HS-PS2-1

Identify the true statement

• The earth is constantly exerting a force on you.

• You are constantly exerting a force on you.

• Both A and B are true.

• Neither A and B are true.

Tags

NGSS.MS-PS2-4

Objects in motion experiencing a zero net force will continue in motion.

• True

• False

An astronaut on the moon has ___________________ than on the earth.

• a larger mass

• more weight

• a smaller mass

• less weight

The direction of friction ________________ the direction of motion.

• is opposite to

• is perpendicular to

• is same as

• has no relation to

What is force?

• a collision of two objects

• a push or pull on an object

• the motion of objects

• the resistance of two objects when they touch each other

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Multiple, simultaneous forces that cancel each other out are called ____________ forces.

• balanced

• accelerating

• unbalanced

• summative

An object slows down

• whenever any forces are present

• naturally

• when a net force acts opposite the direction of motion

• when there are no external forces acting on the object

Tags

NGSS.MS-PS2-2

Which of the following forces is a field force that acts between any two objects?

• An electromagnetic force

• friction

• gravity

• a normal force

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which type of friction keeps a tightened bolt from coming loose?

• Rolling Friction

• Static Friction

• Sliding Friction

• Thread Friction