General science is the study of life, earth, and physical sciences. It includes chemistry, biology, physics, space science and technology etc.

One of the most important subjects asked in almost all the defence examinations like CDS, NDA, AFCAT etc is General Science. Physics, Chemistry, Biology and Ecology are all considered to be parts of General Science. The subject includes topics of scientific nature that we encounter every day.

Broadly, physics involves the study of everything in physical existence, from the smallest subatomic particles to the entire universe. It is the branch of science that deals with the structure of matter and how the fundamental constituents of the universe interact. It studies objects ranging from the very small using quantum mechanics to the entire universe using general relativity.

Chemistry is a branch of natural science that deals principally with the properties of substances, the changes they undergo, and the natural laws that describe these changes.

However, it may be less obvious to you that a significant knowledge of chemistry is often required in a number of related professions including medicine.

Biology is the study of all living organisms (and dead organisms, like fossils). Biology looks at how these organisms form, develop and interact with each other and their environment. This includes all life forms on the earth.

Biotechnology is technology that utilizes biological systems, living organisms or parts of this to develop or create different products. Brewing and baking bread are examples of processes that fall within the concept of biotechnology.

An Environment is everything that is around us, which includes both living and nonliving things such as soil, water, animals and plants, which adapt themselves to their surroundings. It is nature's gift that helps in nourishing life on Earth

Genetics is the scientific study of genes and heredity—of how certain qualities or traits are passed from parents to offspring as a result of changes in DNA sequence.

An epidemic is a disease outbreak that is rapidly spreading in a limited region. A pandemic is an epidemic that is actively spreading to multiple regions across the globe.

A culture represents the beliefs and practices of a group, while society represents the people who share those beliefs and practices. Neither society nor culture could exist without the other.

A hobby is considered to be a regular activity that is done for enjoyment, typically during one's leisure time. Hobbies include collecting themed items and objects, engaging in creative and artistic pursuits, playing sports, or pursuing other amusements.

Anything that can be considered decorative design or handicraft falls under the umbrella of art and craft. Arts and crafts are not just about drawing and painting. They are also about learning how to handle tools, learning how to follow instructions, and learning how to connect with others to create something like one.

Theater is an event where a story is shared by actors with the audience. Cinema is an event where a story is presented to an audience on a screen. Every theatrical show is different every performance because the audience is made up of different people for every performance. Actors react to their audience.