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Eighth Grade (Grade 8) Physics Questions

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Grade 8 :: Simple Machines by jlovering
A bottle opener is an example of what type of simple machine?
  1. Screw
  2. Inclined Plane
  3. Wedge
  4. Lever
Grade 8 :: Simple Machines by jlovering
What can machines NOT do?
  1. make work easier
  2. create more work than you put in
  3. change your force
  4. change the direction of your force
Grade 8 :: Simple Machines by jlovering
In a class 1 lever (like a see-saw), what happens to the load when your effort is pushing down?
  1. It goes up
  2. It goes down
  3. It doesn't move
Grade 8 :: Simple Machines by jlovering
Which of the following is not a simple machine?
  1. Golf Club
  2. Ramp
  3. Scissors
  4. Knife Blade
Grade 8 :: Simple Machines by jlovering
What characteristic of simple machines is often expressed as a percentage?
  1. Work
  2. Power
  3. Efficiency
  4. Mechanical Advantage
Grade 8 :: Phases of Matter by aliciaerickson
Liquids form into:
  1. any shape
  2. the shape of their container
  3. no shape
Grade 8 :: Forces and Motion by cdalsworth
A magician suddenly jerks a tablecloth out from under the dishes on a table. This best demonstrates:
  1. an action-reaction pair of forces.
  2. the dishes have inertia.
  3. gravity tends to hold the dishes securely.
  4. the dishes have no acceleration.
Grade 8 :: Phases of Matter by aliciaerickson
Solid, Liquid, and Gas are called the...
  1. States of Volume
  2. States of Mass
  3. States of Matter
Grade 8 :: Phases of Matter by aliciaerickson
Matter is made of...
  1. matter
  2. particles
  3. gravity
Grade 8 :: Phases of Matter by Vic_Dickenson
When water changes into water vapor this is called                
  1. condensation
  2. transpiration
  3. precipitation
  4. evaporation
Grade 8 :: Magnetism and Electricity by LBeth
The diagram below shows the magnetic field lines for a bar magnet. Which statement below best describes the strength of the magnetic field for the bar magnet?
Magnetic Lines Of Forces
  1. the magnetic field is strongest at north pole of the magnet
  2. the magnetic field is strongest at the south pole of the magnet
  3. the magnetic field is strongest at both the north and south poles
  4. the magnetic field is strongest in the region between the north and south poles
Grade 8 :: Energy and Work by appier
A car or truck moving down the highway has                 energy by virtue of its motion.
  1. kinetic
  2. potential
  3. thermodynamic
  4. chemical
Grade 8 :: Phases of Matter by aliciaerickson
When ice melts it turns into a:
  1. Solid
  2. Liquid
  3. Gas
Grade 8 :: Phases of Matter by aliciaerickson
When water freezes, it turns into:
  1. water
  2. ice
  3. water vapor
Grade 8 :: Forces and Motion by laurenswork
               is the measure of the force of gravity on an object
  1. mass
  2. weight
  3. density
  4. equation
Grade 8 :: Forces and Motion by Vic_Dickenson
If the net force acting on an object is zero, then the object will remain at rest or move in a straight line with a constant speed is                              .
  1. Newton's first law of motion
  2. Newton's second law of motion
  3. Newton's third law of motion
  4. Newton's fourth law of motion
Grade 8 :: Simple Machines by jlovering
Kristopher carried a 200 Newton bag 3 meters up a ladder in 30 seconds. How much power did he use?
  1. 2000 Watts
  2. 18000 Watts
  3. 20 Watts
  4. 0 Watts
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