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General Science & Ability

Notes and Material for G.K-I Compulsory Subject of CSS.

Understanding Genes. How Do Gene Work?

Genes: Genes are the things that determine physical traits ─ how we look ─ and lots of other stuff about us. They carry information that helps make you who you are: curly or straight hair, long or short legs, are all passed through generations of your family in genes. Each cell in the human body […]

What is Climate Change? Causes of Climate Change

Climate Change: The temperature of the Earth is determined by the balance between energy from Sun and its loss back into space. Of Earth’s incoming solar short-wave radiation (mainly ultraviolet (UV) radiation and visible ‘light’) nearly all of it passes through the atmosphere without interference. The only exception is ozone that luckily for us absorbs […]

Types of Rocks and their Properties

Introduction: The rocks of the earth’s crust vary according to mineral composition. Rocks are made out of particles that are made of different combination of normal elements as oxygen, silicon, aluminum, iron, and calcium, together with less-abundant elements Although rocks can be classified according to their physical properties, but the more common approach is to […]

Human Reproductive System: Male and Female Reproductive Systems

Human Reproductive Systems: In both male and female, the reproductive system comprises of a pair of primary reproductive organs (gonads) and various accessory glands and ducts. Taken altogether, the human reproductive system produces gametes, stores and releases sex cells, and nourishes and protects the developing embryo. The Male Reproductive System: The male reproductive system delivers, […]

Layers of the Earth’s Atmosphere

Atmosphere: Earth’s atmosphere is a blanket of gases made out of 78% Nitrogen, 21% Oxygen, and 1% Argon. The other trace gases present in atmosphere are Carbon Dioxide, Hydrogen, Neon, Helium, Krypton, and Xenon. Water vapor dislodges other gases and varies from almost zero to around 4% by volume. The atmosphere lays on Earth’s surface […]

How Acid Rain is formed? Negative Effects of Acid Rain

Acid Rain: Acidic gases like carbon dioxide and Sulphur dioxide dissolves with the water within the rain cloud and causes acid rain. Acid Rain is formed due to emission of poisonous gases into the atmosphere by human activities. Fossil-fuelled powered stations and oil/diesel vehicles radiate synthetic pollutants– chiefly sulphur dioxide (SO2) and nitrogen oxides (NOx) […]