Biochemical process.pptx 123

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BIOLOGY ACTIVITY FA –IV

BIOCHEMICAL CYCLES

BIOLOGY ACTIVITYFA –IV

BIOCHEMICAL PROCESS

DONE BY :ADARSH ANISH .D SRINIKACLASS 9B


CONTENTS :1. OXYGEN CYCLE2. CARBON CYCLE3. WATER CYCLE4. NITROGEN CYCLE5. POLLUTION OF

AIR ,WATER,&SOIL6. PREVENTIVE MEASURES OF

POLLUTION


OXYGEN CYCLE• The oxygen cycle is the biogeochemical

cycle of oxygen within its three main reservoirs: the atmosphere (air), the total content of biological matter within the biosphere and the Earth's crust.

• Oxygen is used and cycled by plants and animals. Plants are the main creators of oxygen in the atmosphere.

• For Ex:- Here the tree uses sunlight and carbon dioxide to produce energy and releases oxygen. The giraffe breathes in the oxygen and then breathes out carbon dioxide. The plant can then use this carbon dioxide and the cycle is complete.

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CARBON CYCLE1. In the atmosphere, carbon is attached to some

oxygen in a gas called carbon dioxide.2. Plants use carbon dioxide and sunlight to make

their own food and grow. The carbon becomes part of the plant.

3. Plants that die and are buried may turn into fossil fuels made of carbon like coal and oil over millions of years.

4. When humans burn fossil fuels, most of the carbon quickly enters the atmosphere as carbon dioxide.

5. Carbon dioxide is a greenhouse gas and traps heat in the atmosphere.

6. Without it and other greenhouse gases, Earth would be a frozen world.




WATER CYCLE• The water cycle describes how water

evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation.

• The water falling on land collects in rivers and lakes, soil, and porous layers of rock, and much of it flows back into the oceans, where it will once more evaporate.

• The cycling of water in and out of the atmosphere is a significant aspect of the weather patterns on Earth.



NITROGEN CYCLEThe nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into various chemical forms as it circulates among the atmosphere and terrestrial and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes.



POLLUTION OF AIR , WATER AND SOIL

• Air pollution is the introduction of particulates, biological molecules, and many harmful substances into Earth's atmosphere, causing diseases, allergies, death to humans, damage to other living organisms such as animals and food crops, or the natural or built environment.

• Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans, aquifers and groundwater). This form of environmental degradation occurs when pollutants are directly or indirectly discharged into water bodies without adequate treatment to remove harmful compounds.


Soil contamination or soil pollution as part of land degradation is caused by the presence of xenobiotic (human-made) chemicals or other alteration in the natural soil environment. It is typically caused by industrial activity, agricultural chemicals, or improper disposal of waste.



OZONE DEPLETION• The ozone layer is a belt of naturally occurring ozone gas that sits

9.3 to 18.6 miles (15 to 30 kilometers) above Earth and serves as a shield from the harmful ultraviolet B radiation emitted by the sun.

• Ozone is a highly reactive molecule that contains three oxygen atoms.

• Stratospheric ozone is being destroyed by a group of manufactured chemicals, containing chlorine and/or bromine. These chemicals are called "ozone-depleting substances" (ODS).

• ODS are very stable, nontoxic and environmentally safe in the lower atmosphere.

• Once in the stratosphere, they are broken apart by the intense ultraviolet light, releasing chlorine and bromine.

• Chlorine and bromine demolish ozone at an alarming rate, by stripping an atom from the ozone molecule. A single molecule of chlorine can break apart thousands of molecules of ozone.



PREVENTIVE MEASURES FOR POLLUTION

• Pollution prevention is a major global concern because of its harmful effects on people's health and the environment.

• Because we are all inhabitants on Earth, everyone is a stakeholder, and every person has something to contribute to advance effective pollution prevention awareness.

• Environmental protection is a natural extension of caring for ourselves and ensuring a sustainable future for generations to come.

"If we heal the earth, we heal ourselves."


1. Every action or inaction of any person has an effect on the environment—be it good, neutral, or negative. By becoming aware and doing the right thing, we choose to be part of the solution. Here are some things you can do:

2. Keep your car in good running condition to avoid emissions.3. Share a ride or carpool.4. Choose to walk or ride a bicycle whenever possible.5. Never use open fires to dispose of waste, especially chemicals and

plastic.6. Adopt the 3 Rs of solid waste management: reduce, reuse, and recycle.7. Buy local foods and goods. In this manner, the use of fuel for transporting

goods can be minimized.8. Look around you house or place of business for ways you could conserve

water.9. Use and buy products that are eco-friendly or made with biodegradable

materials. Avoid plastic.10.Always bring a bag when you shop.11.Plant more trees.



Education

Biochemical process.pptx 123