high school science assessments

Ideally, the evaluation of a crop is done on the basis of total production and the amount of input used, but when different crops are grown in the same field the assessment becomes difficult. Different methods of crop assessment are adopted. Cropping Index The cropping inde..

Scientific Storage of Grains - Besides crop production, good crop management involves storage of grains before distribution. During storage, grains and seeds are subjected to spoilage by various agencies. These agencies are either biotic or abiotic. Some examples are: Biotic - insects, rodents, bir..

Coal is formed in nature by the 'carbonisation' of wood. Conversion of wood to coal under the influence of high temperature, high pressure, and in the absence of air is termed carbonisatio..

Here the aim is to increase crop production. High yielding crops should be developed for this purpos..

Metals have high density and are very heavy. Iridium and osmium have the highest densities where as lithium has the lowest densit..

The installation and maintenance of an OTEC power plant is very high and efficient commercial exploitation is difficul..

The Need to Manage Our Resources - Everything that we use or consume - food, clothes, vehicles, tools, petrol, furniture, medicines, books, toys, and the infrastructure of electricity, roads bridges, and buildings are obtained from resources on this earth. The only thing one gets from outside is th..

Although there are more than hundred elements around us we do not find these elements in their native form in nature. This is because most of these elements are highly reactiv..

This group constitutes the largest group of plants. Seeds are produced inside an ovary which later becomes the fruit. These are highly evolved group of plants. The plant body is distinctly differentiated into roots, stem and leav..

This includes inland and marine fisheries, aquaculture and pisiculture. Fish is a source of high quality animal protein and a rich source of minerals like calcium, phosphorus and iron. India abounds in fish, both fresh water and mari..