Practice Quiz

NAEP Science Grade 8 - Question List

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1. What two gases make up most of the Earth's atmosphere?
  1. Hydrogen and oxygen
  2. Hydrogen and nitrogen
  3. Oxygen and carbon dioxide
  4. Oxygen and nitrogen
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2. A person produces two sound waves with a flute, one immediately after the other. Both sound waves have the same pitch, but the second one is louder. Which of the following properties is greater for the second sound wave?
  1. Frequency
  2. Amplitude
  3. Wavelength
  4. Speed in air
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3. Which of the following is an example of genetic engineering?
  1. Growing a whole plant from a single cell.
  2. Finding the sequences of bases in plant DNA.
  3. Inserting a gene into plants that makes them resistant to insects.
  4. Attaching the root of one type of plant to the stem of another type of plant.
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4. All of the following are examples of erosion EXCEPT:
  1. The wind in the desert blows sand against a rock.
  2. A glacier picks up boulders as it moves.
  3. A flood washes over a riverbank, and the water carries small soil particles downstream.
  4. An icy winter causes the pavement in a road to crack.
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5. Why does the leaf of a plant look green?
  1. Because it absorbs green light
  2. Because it reflects green light
  3. Because it absorbs only yellow and blue light
  4. Because it reflects a mixture of yellow and blue light
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