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Eighth Grade (Grade 8) Science 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 :: Planetary Motion by kelebutler
Planets that are close to the sun
  1. move through the asteroid belt
  2. orbit faster than the outer planets
  3. orbit slower than the outer planets
  4. move closer and closer to the sun
Grade 8 :: Acids and Bases by aem492
A solution at pH 11.5 is
  1. acidic
  2. basic
  3. neutral
  4. none of the above
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 :: 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 :: Periodic Table and Elements by misschalas
The number of protons in the nucleus of an atom of that element is
  1. atomic number
  2. atomic weight
  3. mass number
  4. isotopes
Grade 8 :: Periodic Table and Elements by LBeth
Most of the elements on the periodic table are metals.
  1. True
  2. False
Grade 8 :: Cell Theory by clonekid
Controls the movement of materials into and out of the cell
  1. cell membrane
  2. nucleus
  3. cytoplasm
  4. mitochondria
Grade 8 :: Periodic Table and Elements by LBeth
The periodic table has 7 groups.
  1. True
  2. False
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 :: Periodic Table and Elements by LBeth
The symbol for tin is Sb.
  1. True
  2. False
Grade 8 :: Periodic Table and Elements by LBeth
Cobalt has 27 protons.
  1. True
  2. False
Grade 8 :: Periodic Table and Elements by LBeth
Gold's atomic number is 79.
  1. True
  2. False
Grade 8 :: Phases of Matter by aliciaerickson
Liquids form into:
  1. any shape
  2. the shape of their container
  3. no shape
Grade 8 :: Periodic Table and Elements by LBeth
Chlorine is located in Group 3 of the periodic table.
  1. True
  2. False
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