Physics

Presentation

Nutrient Flow• The living organisms require

numerous elements to regulate their biological activities and for the formation of protoplasm . These elements are called the nutritive elements.

• Some elements such as carbon, hydrogen,calcium,

sodium, magnesium are main components of protoplasm & are required in large quantity.

Nutrient Flow

Resources• A resource is a source or supply from which

benefit is produced.• Typically resources are materials, energy,

services, staff, knowledge, or other assets that are transformed to produce benefit and in the process may be consumed or made unavailable.

• Benefits of resource utilization may include increased wealth, meeting needs or wants, proper functioning of a system, or enhanced well being.

• From a human perspective a natural resource is anything obtained from the environment to satisfy human needs and wants.

ResourcesResourc

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WaterOcea

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Forest

Energy

Soil• Soil is the mixture of minerals, organic

matter, gases, liquids, and the countless organisms that together support life on Earth.

• Soil is a natural body known as the pedosphere and which performs four important functions: it is a medium for plant growth; it is a means of water storage, supply and purification; it is a modifier of Earth's atmosphere; it is a habitat for organisms; all of which, in turn, modify the soil.

Soil

Water• Water is a transparent fluid which forms

the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms.

• As a chemical compound, a water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds.

• Water is a liquid at standard ambient temperature and pressure, but it often co-exists on Earth with its solid state, ice; and gaseous state, steam (water vapour). It also exists as snow, fog, dew and cloud.

Water

Forest• A forest is a large area of land covered

with trees or other woody vegetation.• Hundreds of more precise definitions of

forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing and ecological function.

• According to the widely-used United Nations Food and Agriculture Organization definition, forests covered an area of four billion hectares or approximately 30 percent of the world's land area in 2006.

Forest

Minerals• A mineral is a naturally occurring

substance, representable by a chemical formula, that is usually solid and inorganic, and has a crystal structure.

• It is different from a rock, which can be an aggregate of minerals or non-minerals and does not have a specific chemical composition.

• The study of minerals is called mineralogy.

Minerals

Oceans• An ocean is a body of saline water that

composes much of a planet's hydrosphere.

• On Earth, an ocean is one of the major conventional divisions of the World Ocean, which covers almost 71% of its surface.

• These are, in descending order by area, the Pacific, Atlantic, Indian, Southern, and Arctic Oceans.

• The word sea is often used interchangeably with "ocean" in American English but, strictly speaking, a sea is a body of saline water.

Oceans

Energy• In physics, energy is a property of objects

which can be transferred to other objects or converted into different forms, but cannot be created or destroyed.

• The "ability of a system to perform work" is a common description, but it is difficult to give one single comprehensive definition of energy because of its many forms.

• For instance, in SI units, energy is measured in joules, and one joule is defined "mechanically", being the energy transferred to an object by the mechanical work of moving it a distance of 1 metre against a force of 1 newton.

Energy

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