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science

greenhouse
by

Isha Ballgobin

on 8 January 2013

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Transcript of science

Greenhouse what is a greenhouse The history of the greenhouse The purpose of a greenhouse Advantages of a greenhouse The benefits of a greenhouse Disadvantages of a greenhouse How a greenhouse helps A greenhouse is a building in which plants are grown. These structures can range in size from small sheds to industrial-sized buildings. The first greenhouse as we believe was built by the Italians although historical sources say that the Romans used the greenhouse to provide fruit and vegetables all year round. But Charles Lucien Bonaparte, a French person, is normally the one who most of us believe was the inventor of the modern practical greenhouse. the purpose of a greenhouse is to grow plants because in regions where there are seasonal changes, certain varieties of plants can fail to grow during cold temperatures or in less-than-favorable conditions. Many people have to construct a greenhouse in as a way to maintain certain varieties of plants all year-round. The benefits of a greenhouse are that Greenhouses are designed to maintain the perfect environment for plants to grow in. They do this because of the plants from the harsh conditions outdoors. The walls let plenty of light in, but filter it enough so it does not dry out the plants. As water is evaporated inside the structure, it is kept inside which keeps humidity high. This makes is easy to keep the plants watered. On cold nights the walls act as an insulator to keep the temperature levels moderate. The advantages of a greenhouse are that using a greenhouse is that you can control the environment. You can create a year-round spring-like, warm temperature for plants to grow. You can control how much sun comes in one section of the greenhouse can be shaded, while the other section is full sun. You can control the amount of water the plants get. They are not affected by rain or outside moisture. Also, since the temperature is warm year round, you can plant and grow spring plants in winter, and have them bloom early since the environment allows for it. You can decide what you wish to plant, not wait on the weather to dictate what you can plant. One advantage other advantage is to using a greenhouse is that you can eliminate garden pests. It is hard, if not impossible, for many garden pests to enter a greenhouse, and therefore you can grow flowers, fruits and vegetables without worry about pests ruining the fruit or eating the flowers. A disadvantage is when gardening in a greenhouse; you must mechanically pollinate or introduce insects so pollination can occur. Mechanical pollinators shake the plants to move pollen through the air. To pollinate using insects, the gardener must find and obtain the correct insects or pollinators, introduce them into the environment and, if needed, remove them from the environment. Gardeners can be intimidated at the thought of purchasing and releasing bees into their greenhouse. A greenhouse helps individuals by at winter time instead of buying food they can grow their own food in their backyard
It helps the environment by when it's winter time instead of the plants to die you can just put them inside of the greenhouse.
It helps the economy by when a person buys a greenhouse they don't have to waste their money on fruits and vegetables.
and a greenhouse helps the society by saving a lot of money. By: Isha Ballgobin How a greenhouse hinders A greenhouse hinders by when we make climate change by emitting less greenhouse gases such as carbon dioxide . The less we emit, the less warming there will be in the future. One of the main problems of a greenhouse One of the main problems about a greenhouse is that it produces greenhouses gases and it wastes a lot of energy, and it also costs a lot of money. Greenhouse effect The components of a greenhouse gardeners, water, buckets, hoses, seeds, plants, soil, heat (furnace), lights, glass, the control system, liquid oxygen tank, fertilizer, natural gas for oxygen generators, liquid oxygen supple mention, carbon dioxide, evaporative pad, ridge vent, gardening accessories, etc. The input of a greenhouse The input of the greenhouse are seeds, money, water, plants etc The output of a greenhouse The output of a greenhouse are plants (vegetables, fruits, flowers, trees), money, resources, food, money (if you sell the product) etc. System The greenhouse is a mechanical, physical, social, and control system. How it can be stop The natural carbon and water cycles support a greenhouse effect in the atmosphere where just enough of the sun's heat is kept back so that life can go on comfortably. Efficiencies Greenhouses do their job most successfully using designs and siting for energy efficiency and maximum light transmission. Greenhouses must optimize crop growth and energy use by allowing sunlight in during the day, retaining as much heat as possible during cold weather, and providing sufficient ventilation to avoid excessive interior temperature and humidity.

Where possible, greenhouse construction materials with the highest insulation values should be used. Proper glazing material decreases energy loss while still allowing the natural spectrum of light inside to facilitate the healthy growth of the plants within. When heating greenhouses, some fuels have a higher heat value than others and some heating units have a greater efficiency. Inefficiencies The inefficiencies are that the greenhouses produce the greenhouse gases Facts Greenhouses have become an important part of the modern agricultural industry as well as for home gardeners. They allow humans to produce food crops out of season and to grow tropical plants and flowers as well as plants for herbal remedies. New technologies are being developed to increase the efficiency and yield of greenhouse production to lessen the dependence on energy. How greenhouse gases has changed overtime Carbon dioxide (CO₂) has increased from our use of fossil fuels which we burn for use in transportation, energy generation, building heating and cooling. Deforestation also releases CO2 and reduces its uptake by plants The Netherlands has some of the largest greenhouses in the world. Such is the scale of food production in the country that in 2000, greenhouses occupied The largest greenhouse in the world. My bibliography 1) www.ehow.com ( internet) 2) all about greenhouses (book) 3) greenhouses (YouTube) how long does it take to build a greenhouse?

how much does a greenhouse cost?

how many people does it take to build a greenhouse?

how many years does a greenhouse last for? Thank-you for listening to my presentation! Modern greenhouses
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