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Eighth Grade (Grade 8) Science Questions

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Grade 8 Forces and Motion
What is tension?
  1. a force that comes when you are stressed
  2. a force that presses or squeezes something together
  3. a force that acts to expand or lengthen the thing it is acting on
Grade 8 Inner Planets
If astronomers fond galaxies that weren't experiencing redshift, this would mean what?
  1. Those galaxies were moving slower than other galaxies.
  2. Those galaxies were not moving away from us.
  3. Those galaxies were moving faster than other galaxies.
  4. None of the above.
Grade 8 Physics
If the velocity of a body is doubled its kinetic energy                 .
  1. becomes double
  2. becomes half
  3. becomes 4 times
  4. remains the same
Grade 8 Physics
Which one of the following does not possess kinetic energy?
  1. a flying bird
  2. a running child
  3. a stationary bicycle
  4. a moving ball
Grade 8 Space Exploration
Match the correct term with its corresponding definition.
__ Energy due to temperature A. Refracting
__ Shows how much energy a body radiates at different wavelengths B. Optical Telescope
__ Spectral ranges within which air is largely transparent to radiation C. Atmospheric Windows
__ Place equipped for the observation of sky objects D. Light-Gathering Power
__ Forms images of faint and distant stars E. Radiation Spectrum
__ The heart of a telescope F. Thermal Radiation
__ The ability of a telescope to collect light G. Objective
__ The size of a telescope, ex. 150-mm, or 8-mm H. Astronomical Observatory
__ Type of telescope that uses lens as a its objective I. Aperture
Grade 8 Solar System
Which of the following is true concerning the process described in Accretion Theory?
  1. would have occurred within a nebula
  2. since even the smallest particles have gravitational and other attractive forces between them, nearby particles were attracted together to form clumps of particles
  3. these clumps (called planetesimals ) now behaved like larger masses, which allowed them to pull on other particles that were farther away
  4. given enough time, the masses of particles ultimately coalesced into the structures that make up our solar system
  5. All of the above are true of the Accretion Theory
Grade 8 Solar System
What does the mnemonic device, "My Very Educated Mother Just Served Us Nine Pizzas," help us remember?
  1. That my mother is a very kind person, who likes to give us pizza.
  2. The order of the planets, from innermost to outermost, as they orbit the Sun.
  3. The distance between the planets, by replacing letters with specific numbers.
  4. None of the above.
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