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Science Questions - All Grades

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Grade 4 Forces and Motion
Which of the following is considered an invisible force?
  1. Gravity
  2. Friction
  3. Air resistance
  4. All of the above
Grade 6 Food Chains and Webs
Some beetles break down the remains of dead animals. Some mushrooms break down the remains of dead trees. These actions most benefit plants by what?
  1. returning nutrients to the soil.
  2. releasing oxygen into the air.
  3. making space for new animals.
  4. decreasing the population of herbivores.
Grade 4 Rocks
Cooled lava on Earth's surface turns into                  .
  1. magma.
  2. sedimentary rock.
  3. metamorphic rock.
  4. igneous rock.
Grade 7 Forces and Motion
When an unbalanced force acts on an object, the force                                         .
  1. changes the motion of the object
  2. is cancelled by another force
  3. does not change the motion of the object
  4. is equal to the weight of the object
Grade 7 Properties of Matter
Grade 4 Food Chains and Webs
Grade 9 Heat Transfer
Friction causes kinetic energy to be converted into                  .
  1. potential energy
  2. thermal energy
  3. mechanical energy
  4. electrical energy
Grade 7 Solvents, Solutes, and Solubility
Grade 5 Magnetism and Electricity
Grade 10 Macromolecules
Grade 7 Periodic Table and Elements
Grade 11 Forces and Motion
When an object is in free fall,                         .
  1. its speed stays the same
  2. it decelerates
  3. it accelerates
  4. none of the above
Grade 8 Atomic Structure
Compared to the charge and mass of a proton, an electron has                                   .
  1. the same charge and a smaller mass
  2. the same charge and the same mass
  3. opposite charge and smaller mass
  4. opposite charge and the same mass
Grade 6 Forces and Motion
Average speed is equal to                .
  1. distance/time
  2. time/distance
  3. distance + time
  4. distance * time
Grade 7 Planetary Motion
Day and night are caused by                                  .
  1. the tilt of Earth's axis
  2. Earth's revolution around the Sun
  3. eclipses
  4. Earth's rotation on its axis
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