NAEP Science Grade 8 - Question List

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21. How do most fish get the oxygen they need to survive?
  1. They take in water and break it down into hydrogen and oxygen.
  2. Using their gills, they take in oxygen that is dissolved in water.
  3. They get their oxygen from the food they eat.
  4. They come to the surface every few minutes to breathe air into their lungs.
22. Pat has two kinds of plant food,"Quickgrow" and "Supergrow." What would be the best way for Pat to find out which plant food helps a particular type of houseplant grow the most?
  1. Put some Quickgrow on a plant in the living room, put some Supergrow on a plant of the same type in the bedroom, and see which one grows the most.
  2. Find out how much each kind of plant food costs, because the more expensive kind is probably better for growing plants.
  3. Put some Quickgrow on a few plants, put the same amount of Supergrow on a few other plants of the same type, put all the plants in the same place, and see which group of plants grows the most.
  4. Look at the advertisements for Quickgrow, look at the advertisements for Supergrow, and see which one says it helps plants grow the most.
23. Which of the following living things in the pond system uses the energy from sunlight to make its own food?
  1. Insect
  2. Frog
  3. Water lily
  4. Small fish
24. Which living things in the pond system break down dead plants and animals?
  1. Green algae
  2. Bacteria
  3. Rushes
  4. Frogs
25. If air pollution causes the rain that falls on this pond to become much more acidic, after two years how will this acidity affect the living things in this pond?
  1. There will be more plants and animals because the acid is a source of food.
  2. There will be fewer plants and animals because the acid will dissolve many of them.
  3. There will be fewer plants and animals because many of them cannot survive in water with high acidity.
  4. There will be more plants and animals because the acid will kill most of the disease-causing microorganisms.

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