Revision Guide: Nature’s Treasures

Natural resources are materials provided by nature, crucial for survival, like air, water, and soil.

Air is composed of 78% nitrogen, 21% oxygen, and 1% other gases like carbon dioxide.

Oxygen in air is essential for survival; living beings can't survive without it for long.

Water is vital for drinking, agriculture, cleaning, cooking; it covers two-thirds of Earth.

Freshwater is found in rivers, lakes, and underground, but most water on Earth is salty.

Methods include rainwater harvesting, fixing leaks, and recycling to prevent wastage.

Renewable resources can regenerate naturally; examples include solar energy and freshwater.

Non-renewable resources, like fossil fuels, take millions of years to form and are exhaustible.

The Sun is the primary energy source, essential for photosynthesis and various heating processes.

Forests provide habitat, food, and oxygen, and help maintain ecological balance.

Soil supports plant growth and biodiversity; it consists of minerals, organic matter, and microorganisms.

Rocks, made of minerals, are used for construction and form over millions of years.

Fossil fuels like coal and oil are non-renewable resources formed from ancient organic matter.

Pollution of air and water from human activities impacts health; prevention is essential.

Diverse ecosystems ensure food and shelter; they rely on healthy forests and water bodies.

Celebrated on March 22nd, it raises awareness about water conservation and pollution.

A historical movement in India aimed at tree conservation, where locals hugged trees to protect them.

Understanding nature's treasures leads to responsible usage; awareness drives conservation efforts.

Transition to less polluting energy, like solar and wind, reduces environmental impact.

Human-made resources are created to meet needs, while natural resources exist in nature.