The glass panel used in greenhouses is known to retain ________.

The Correct answer is heat.

Key Points

• Greenhouses are designed to create an optimal growing environment for plants.
• The primary function of a glass panel in a greenhouse is to allow sunlight to enter while retaining heat inside.
• This retained heat helps in maintaining a warm environment, which is essential for the growth of plants, especially in colder climates.
• By trapping heat, the greenhouse effect is created, which ensures that the internal temperature remains higher than the outside temperature.
• This effect not only promotes plant growth but also extends the growing season.

 Additional Information

• Humidity
  • Humidity refers to the amount of water vapor present in the air.
  • While humidity is important for plant growth, the primary role of glass panels in greenhouses is not to retain humidity but to trap heat.
• pH
  • pH is a measure of the acidity or alkalinity of a solution.
  • It is critical for soil and water quality but is not related to the function of glass panels in greenhouses.
• Rainfall
  • Rainfall is the amount of precipitation that falls in an area.
  • Greenhouse panels protect plants from excessive rainfall, but they do not retain rainfall.