Multiple choice

In Mystery Science we learned that trees don't eat soil, but what makes them so heavy?

  1. water

  2. air

  3. dirt

  4. None of the above

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

Through photosynthesis, trees capture carbon dioxide from the air and convert it into biomass (wood and leaves). While water is necessary, the majority of a tree's dry mass comes from the carbon pulled from the air.