Multiple choice

Greenhouse is ______.

  1. a building of glass in which temperature is very low

  2. a building in which green plants are cultivated

  3. a building chiefly of glass in which temperature is maintained within the desired range

  4. none of these

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

A greenhouse is a structure made primarily of glass that allows sunlight in while trapping heat to maintain temperature within a desired range for plant cultivation. The glass acts as a selective transmitter of solar radiation.