organic
Definition
Organic is a term used to describe chemical compounds that contain carbon. Carbon is a very special element because it can form bonds with other atoms in a variety of ways. This allows organic compounds to be very diverse and complex.
Organic compounds are found in all living things. They are essential for life, as they make up the molecules that are necessary for cells to function. For example, DNA and RNA are organic compounds that store genetic information. Proteins are organic compounds that are used to build and repair tissues.
Organic compounds are also found in some non-living things. For example, coal and petroleum are organic compounds that are formed from the remains of ancient plants and animals.
How can the word be used?
Organic compounds are found in all living things.
Different forms of the word
Adjective: Relating to or derived from living organisms.
Noun: A substance that is derived from living organisms.
Etymology
The word "organic" comes from the Greek word "organikos," which means "of or pertaining to an organ." The Greek word "organikos" is also the source of the Latin word "organicus" and the French word "organique.".
The word "organic" was first used in English in the 17th century. It was used to refer to something that was derived from living organisms.
Question
What is organic?
AQA Science Exam Question and Answer
Question:
Explain the concept of organic farming and its benefits compared to conventional farming methods. Provide specific examples of practices used in organic farming and how they contribute to environmental sustainability.
Answer:
Organic farming involves cultivating crops and raising livestock using methods that prioritise natural processes and avoid synthetic chemicals. One key benefit of organic farming over conventional methods is its focus on sustainability. For instance, instead of using synthetic pesticides and fertilisers, organic farming employs practices like crop rotation and companion planting. Crop rotation helps maintain soil health and fertility by alternating plant types, while companion planting combines different crops to deter pests naturally.
Furthermore, organic farming promotes biodiversity by preserving natural habitats and avoiding genetically modified organisms (GMOs). This benefits ecosystems and can enhance soil quality. For instance, using cover crops in organic systems prevents soil erosion, improves water retention, and promotes beneficial soil microorganisms.
In contrast, conventional farming often relies on monoculture and intensive chemical use, which can lead to soil degradation, water pollution, and decreased biodiversity.
An example of organic farming's positive environmental impact is found in the use of compost as fertiliser. Instead of chemical fertilisers, organic farmers use compost to enhance soil structure, water-holding capacity, and nutrient content. This not only nourishes crops but also reduces the need for synthetic chemicals.
In conclusion, organic farming prioritises sustainable practices that benefit both agricultural productivity and the environment. By avoiding synthetic chemicals, promoting biodiversity, and maintaining soil health, organic farming contributes to a more ecologically balanced and sustainable agricultural system.