Green House

GHOW A GREENHOUSE WORKS

                A greenhouse provides a comfortable environment for plants. Sufficient amount of sunlight, water and heat is provided in a greenhouse. In a building such as a greenhouse, plants are able to get all the sunlight that they need to grow without being fully exposed to natural elements. Commonly known, sunlight is needed primarily for the process of photosynthesis. Other than that, the process of transpiration will also increase when sunlight is present.

                When sunlight shines into the greenhouse, it begins to heat up the ground. As the ground begins to get hotter, evaporation will occur off the moist grounds. This will increase air humidity and also create air circulation. The heat from the ground also allows the plant to regulate its temperature using the process of transpiration. Ultraviolet light from the sun is also known to increase the rate of photosynthesis. Therefore, oxygen level will increase, ultimately increasing the rate of growth as more foods for the plants are produced.

                The heated ground will also warm the air above it. As the air gets hotter, it will begin to circulate the greenhouse. The warm air will be ensure the plants warmness through winter or at nighttime, as heated ground will act as a “heatbag”, absorbing heat and keeping warm for a long time.  Convection of heat will occur. As hot air rises, this principle is used in many things, such as hot air balloons.

                Heated air will rise to the top while cooler air will replace the air at the bottom. The process is repeated when the cooler air becomes hotter due to the hot grounds. This is due to the hot air being less dense than cold air. Commonly known, denser medium will sink while less dense medium will float. Therefore, the hot air, which is less dense will begin to flow upwards, while the cool air begins to flow downwards, being warmed. As the cool air becomes hotter, the hot air will become cooler, and the...