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Eighth Grade (Grade 8) Physics Questions

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Grade 8 :: Forces and Motion by ncarlson0923
Grade 8 :: Forces and Motion by ncarlson0923
Why is Newton's first law sometimes called the law of inertia?
  1. because inertia is the tendency of objects to resist changes to their motion
  2. because inertia describes the application of force to an object at rest
  3. because inertia describes the applications of force to an object in motion
  4. because inertia is the same thing as friction
Grade 8 :: Forces and Motion by ncarlson0923
When is the velocity of an object constant?
  1. when only its speed changes
  2. when only its direction changes
  3. when its speed and its direction both change
  4. when neither its speed nor its direction change
Grade 8 :: Forces and Motion by ncarlson0923
What features determine an object's acceleration?
  1. the forces acting on it and its size
  2. the forces acting on it and its mass
  3. the forces acting on it only
  4. its weight and its mass
Grade 8 :: Forces and Motion by ncarlson0923
How often does the tip of an hour hand on a clock have the same velocity?
  1. once every minute
  2. once every hour
  3. once every 12 hours
  4. once every 24 hours
Grade 8 :: Forces and Motion by ncarlson0923
If you use two difference reference points to describe the position of the same item, how will your descriptions differ?
  1. They will always differ in distance.
  2. They will always differ in direction.
  3. They will differ in either distance or direction or both.
  4. They will differ in either distance or direction but not both.
Grade 8 :: Energy and Momentum by doliver701
Which situation is an example of increasing potential energy?
  1. a bicyclist stopping at a stop sign
  2. a cat jumping from a tree
  3. emptying a bucket of water
  4. pulling a wagon uphill
Grade 8 :: Matter by CaryBloomquist
A gas has
  1. a definite shape and volume.
  2. a definite shape, but no definite volume.
  3. no definite shape or volume.
  4. no definite shape, but a definite volume.
Grade 8 :: Heat Transfer by doliver701
Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot?
  1. The hot water causes a chemical reaction to take place in the spoon.
  2. The heat from the hot water is conducted to the spoon handle.
  3. The hot water heats the air surrounding the upper part of the spoon.
  4. The hot water causes a physical change in the spoon handle.
Grade 8 :: Forces and Motion by doliver701
Jeff was riding in a car. Which change demonstrates the GREATEST effect of inertia?
  1. The car makes a sudden stop.
  2. The car slows down gradually.
  3. The car changes into another lane.
  4. The car runs out of gas and rolls to a stop.
Grade 8 :: Matter by CaryBloomquist
Sublimation is a change from a
  1. solid to a liquid.
  2. gas to a liquid
  3. solid to a gas
  4. liquid to a solid
Grade 8 :: Energy and Momentum by csantana
The energy of matter in motion is                
  1. electromagnetic
  2. potential
  3. chemical
  4. kinetic
Grade 8 :: Matter by CaryBloomquist
Vaporization that takes place inside a liquid is called
  1. evaporation
  2. boiling
  3. condensation
  4. sublimation
Grade 8 :: Waves and Sound by doliver701
All waves transmit
  1. energy.
  2. mass.
  3. matter.
  4. radiation
Grade 8 :: Waves and Sound by doliver701
In order for a fish to see a bug just above the surface of the water, light travels from the insect through the air and crosses into the water until it reaches the fishes' eye. Which statement is true regarding the light wave as it travels?
  1. It will bend as it hits the water because it slows down.
  2. It will bend as it hits the water because the water particles move slower than air.
  3. It will travel straight from the bug to the fishes' eye because that is the most direct path.
  4. It will travel straight from the bug to the fishes' eye because it will continue to travel at the speed of light.
Grade 8 :: Matter by CaryBloomquist
During a change of state, such as melting or freezing, a substance's temperature
  1. increases
  2. decreases
  3. remains constant
  4. increases during melting and decreases during freezing
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