Multiple choice

What is under Yellowstone National Park that causes the many hot springs and geysers?

  1. underground rivers and streams

  2. a series of artesian springs

  3. a full aquifer

  4. hot, molten rock

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yellowstone sits atop a volcanic hotspot. The heat from the underlying molten rock (magma) warms the groundwater, creating the park's famous geysers and hot springs.