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Ninth Grade (Grade 9) Physics Questions

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Grade 9 Energy and Momentum
Newton's Third Law of Motion is also called the                    .
  1. law of inertia
  2. law of momentum
  3. law of velocity
  4. law of acceleration
Grade 9 Energy and Momentum
Energy stored in the bonds between atoms is called
  1. kinetic energy.
  2. mechanical energy.
  3. chemical energy.
  4. thermal energy.
Grade 9 Forces and Motion
Newton's Third Law gets help from the first two laws. Which aspects of those laws are necessary to help explain Newton's Third Law of Motion? Select all answers that apply.
  1. An object in motion tends to stay in motion
  2. An object at rest tends to stay at rest
  3. Force equals mass times acceleration
  4. The greater the mass is, the greater the force necessary to accelerate that mass is
  5. The acceleration of an object is parallel and directly proportional to the force created
  6. For every action, there is an equal and opposite reaction
  7. Apples hurt when they land on your head
Grade 9 Forces and Motion
What is Newton's first law of motion?
  1. An object will not be in motion until acted on by an unbalanced force.
  2. An object in motion will continue in motion unless acted on by an unbalanced force
  3. A body moving moving in a straight line will continue moving in a straight line until disturbed on by an unbalanced force
  4. None of the above.
Grade 9 Heat Transfer
The transfer of energy (heat) through space by means of electromagnetic waves is
  1. conduction.
  2. convection.
  3. radiation.
Grade 9 Waves and Sound
A sound wave is an example of a
  1. transverse wave.
  2. longitudinal wave.
  3. primary wave.
  4. secondary wave.
  5. ocean wave.
Grade 9 Energy and Momentum
The total amount of kinetic and potential energy in a system is called
  1. chemical energy.
  2. mechanical energy.
  3. radiant energy.
  4. thermal energy.
Grade 9 Matter
Building blocks of matter are called                .
  1. mass
  2. RNA
  3. neutrons
  4. atoms
  5. protons
Grade 9 Waves and Sound
Waves not only move up and down, but also move
  1. forwards.
  2. backwards.
  3. none of the above.
  4. a and b.
Grade 9 Magnetism and Electricity
What is the area around a magnet in which it can exert a force called?
  1. magnetic domain
  2. magnetic area
  3. magnetic source
  4. magnetic field
Grade 9 Light and Optics
A flat surface that produces an image by regular reflection is                  .
  1. a plane mirror
  2. a convex mirror
  3. a concave mirror
  4. none of the above
Grade 9 Forces and Motion
An object will move if the forces acting on it are                .
  1. negative
  2. unbalanced
  3. balanced
  4. positive
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