7th Grade Semester 2 Final Review Question Preview (ID: 37922)


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According to Newton’s first law of motion, an object at rest will stay at rest and an object in motion will stay in motion unless acted upon by what?
a) An unbalanced force
b) Gravity
c) A brick wall
d) An object with a large mass

What is the equation we use with Newton’s second law of motion?
a) F = m + a
b) F = m - a
c) F = ma
d) F = m/a

Newton's 3rd law of motion says:
a) For every action, there is equal rest time.
b) For every action, there is an equal and opposite reaction.
c) For every action, there is an unbalanced force.
d) Every object accelerates equally when dropped.

When you are riding in a car and the car stops suddenly, you continue moving forward because of:
a) Friction
b) Inertia
c) Gravity
d) Centripetal force

What are the units for Force, mass, and acceleration?
a) Force = N mass = m/s2 acceleration = kg
b) Force = m/s2 mass = kg acceleration = N
c) Force = kg mass = N acceleration = m/s2
d) Force = N mass = kg acceleration = m/s2

Why is acceleration = 9.8 m/s2 so special?
a) This is the acceleration of all objects experiencing friction
b) This is the acceleration of all objects in motion
c) This is the acceleration of all falling objects
d) This is the acceleration of objects experiencing a force

What is the force that opposes motion called?
a) Friction
b) Free-body force
c) Oppositional force
d) The force of inertia

In physics, a push or a pull is called _______.
a) Inertia
b) A force
c) A reaction
d) Conserved energy

Objects will only move if forces are ______.
a) Balanced
b) Unbalanced
c) Conserved
d) Equal

A ball is sitting on flat ground. Someone pushes the ball once and it starts rolling. Why does the ball eventually slow down and stop?
a) The force of the push slowly wears off.
b) The action force of the push is opposed by the reaction force.
c) The force of friction slows the ball down until it stops.
d) The ball’s inertia takes over, slowing it down until it stops.

The balloon rocket experiment we did in class was a perfect example of: _____________.
a) Newton's 1st law of motion
b) Newton's 2nd law of motion
c) Newton's 3rd law of motion
d) All of the above

The law of conservation of energy states: ______________________.
a) Energy CAN be created or destroyed.
b) Energy only exists as kinetic energy.
c) Energy CANNOT be created or destroyed, only transferred from one form to another.
d) Energy CANNOT be created, but CAN be destroyed

Kinetic energy can also be called ____________.
a) Stored energy
b) Energy of motion
c) Energy of heat transfer
d) Energy of Newton’s Laws

According to the law of conservation of energy, what happens to light energy when you turn off a light switch?
a) Light energy is released into the room
b) Light energy is destroyed
c) Light energy is converted back into electrical energy
d) Light energy remains in the light bulb, but becomes invisible

An orange is hanging on a tree. The orange suddenly falls from the tree. That means the potential energy is being transformed into what type of energy?
a) Light
b) Kinetic
c) Sound
d) Potential

Potential or kinetic energy? -- An airplane flying through the air.
a) Potential
b) Kinetic
c)
d)

Potential or kinetic energy? -- A stretched rubber band
a) Potential
b) Kinetic
c)
d)

Potential or kinetic energy? -- A nuclear bomb sitting in its storage crate
a) Potential
b) Kinetic
c)
d)

Potential or kinetic energy? -- A baseball playing sliding into home plate.
a) Potential
b) Kinetic
c)
d)

Which of the following is NOT a form of heat transfer?
a) Conduction
b) Nuclear
c) Convection
d) Radiation

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