Question

Why do people cultivate plants in a greenhouse?

• A. Greenhouse is transparent to incoming sunlight.
• B. Greenhouse traps heat.
• C. Temperature inside the greenhouse is lower than that of the surroundings.
• D. Greenhouse increases fertility of the soil.

Answer 1

Answer: (A), (B)

The correct options are
A Greenhouse is transparent to incoming sunlight.
B Greenhouse traps heat.

A greenhouse is a small structure with glass walls and a glass roof. It is used to grow fruits and vegetables in cold weather. The sunlight enters the greenhouse as glass is transparent to incoming sunlight. Some part of this sunlight is used by plants and soil and some part is reflected back as heat radiation. The glass walls of the greenhouse trap some of this reflected heat radiation, making it warm compared to the surroundings.