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PSSA Grade 8 Science - Topic: Earth and Space Sciences

Quiz by PSSA Grade 8 Science

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5 questions
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  • Q1
    Fossils of extinct corals are commonly found in Pennsylvania. Scientists who study these coral fossils indicate that they are similar to living corals. Which statement BEST explains why these fossils provide valuable information about prehistoric Pennsylvania?
    They may indicate that corals may have lived on land at some point in history because corals presently live in aquatic environments.
    They may provide evidence that Pennsylvania was once covered by warm ocean waters since most corals are presently found in these environments.
    They may indicate that the earliest sett
    They may provide evidence for evolution by comparing adaptations for living on land with aquatic adaptations in the same species.
  • Q2
    The acidity of the water in a stream is indicated by its pH. Historically, a certain stream has had a pH of 6.0. Acid rain has caused the stream's pH to become 4.8. Which statement predicts how the stream's ecosystem will MOST LIKELY be impacted?
    The number of fish in the stream will increase
    The number of fish in the stream will decrease
    The flow rate of the stream will increase.
    The flow rate of the stream will decrease.
  • Q3
    Which system contains water that is MOST LIKELY to form a deep canyon?
    a wetland
    a river
    an ocean
    an estuary
  • Q4
    Soil at the shore of Lake Erie in Pennsylvania has a high sand and gravel content. Which of the following is a characteristic of this type of soil?
    extensive producer biomass
    significant depth before hitting bedrock
    rapid water drainage
    extreme acidity
  • Q5
    Erie, Pennsylvania, experiences lake-effect snow in the fall when cold winds from the northwest move across warmer lake water. The air absorbs water vapor from the lake and then deposits it as snow to the east and southeast of the lake. During some winters, the surface of Lake Erie freezes solid. Which statement describes how this event would most likely change lake-effect snow in Erie, Pennsylvania?
    Evaporation from the lake would essentially stop, causing less water to be in the surrounding air, which would result in a decrease in the amount of snowfall in Erie
    Condensation would increase, producing an increase in the amount of snowfall in Erie because the lake would remain at a constant temperature when frozen.
    Winds blowing from the lake and into Erie would stop because the lake cannot lose heat when frozen.
    The weather in Erie would include excessive snow, wind, and freezing temperatures because the lake would be unable to absorb energy from the air.

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