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FCAT Grade 8 Science Assessment Practice Questions

Category - FCAT Science Assessment Grade 8

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Crude oil, which is refined into petroleum, is found in layers of permeable rock. How was crude oil formed?
  1. Carbonization.
  2. Shift of the crust.
  3. Heat and pressure from overlying layers of sediment.
  4. Microbial fermentation.
  5. Burning by the earth’s core.
Explanation
Answer: C - Crude oil is believed to have formed from heat and pressure from layers of sediment, resulting in a slow hydrogenation of plant and animal biomass into the hydrocarbons in crude oil.
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