Multiple choice general knowledge science & technology

Tar sands are __________.

  1. a cheap and easily recoverable source of energy

  2. mixtures of clay and sand caombined with water and bitumen

  3. layers of sand mixed with layers of petroleum

  4. available everywhere on Earth at a depth of 4,000 feet beneath the surface
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tar sands (oil sands) are mixtures of clay, sand, water, and bitumen - a heavy, viscous form of petroleum. They are NOT cheap or easily recoverable (A) - extraction is energy-intensive and environmentally damaging. They're not simple sand-petroleum layers (C) nor found everywhere at 4000 feet (D).

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