Science is the systematic study of the natural world through observation, experimentation, and analysis. It involves forming hypotheses, conducting experiments, collecting data, and analyzing results to develop conclusions and theories. The primary aim of science is to understand how the universe works, from the smallest particles to the vastness of space.
Science is divided into several branches:
- Physical Sciences – These include physics, chemistry, astronomy, and geology, and they focus on understanding the laws of matter and energy.
- Life Sciences –These focus on living organisms and include fields like biology, ecology, and medicine.
- Social Sciences – These study human behavior and societies, such as psychology, sociology, and economics.
- Environmental Science –The study of the environment and the impact of human activity on it.
Scientific discoveries and advancements often lead to new technologies that improve our quality of life. Science helps answer fundamental questions about existence, provides solutions to real-world problems, and drives progress in many areas of life.
Science Chapters
54 chaptersQuestions related to Science
Why is it important to recycle materials like plastic, paper, and glass? The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object? (a) Between the principal focus and the centre of curvature (b) At the centre of curvature (c) Beyond the centre of curvature (d) Between the pole of the mirror and its principal focus. An element P has 11 electrons and belongs to the 3rd period. What is its valency, and what type of compound would it most likely form with oxygen? Which of these is a molecule of a compound? Why is it important to prevent water pollution in rivers and lakes, considering they are part of the global water cycle? Distinguish between an oxidizing agent and a reducing agent in terms of electron transfer. What is a tissue? A person suffers a spinal cord injury, leading to paralysis. Which type of tissue's function is most directly impaired, preventing communication between the brain and muscles? Assertion (A): Blood in arteries is always oxygenated. Reason (R): Arteries carry blood away from the heart to different organs. Balance the following chemical equation: Fe + H2O → Fe3O4 + H2. What is the sum of the coefficients of the reactants? If you wind a coil of wire around a soft iron core and pass current through it, what have you created? A satellite orbiting the Earth continuously falls towards the Earth but does not hit it because: A pitcher throws a baseball. As the ball leaves the pitcher's hand, it has a certain momentum. Which force primarily acts to change this momentum later? What is the magnitude of the gravitational force between the Earth and a 1 kg object on its surface? (Mass of Earth = 6 × 10²⁴ kg, Radius of Earth = 6.4 × 10⁶ m) Which of the following is an example of a reflex action? Describe two ways in which deforestation can impact the local water cycle. A car travels the first half of a journey at an average speed of 40 km/h and the second half at an average speed of 60 km/h. What is the average speed for the entire journey? The formula for electric energy consumed (E) is: What protects the brain from physical shocks? Why is fractional distillation preferred over simple distillation for separating components of crude oil? Calculate formula unit mass of CaCl₂. The SI unit of electrical resistance is: Imagine you are standing near a deep well and you drop a stone into it. You hear the splash after a few seconds. Why is there a delay between seeing the stone hit the water and hearing the splash? How does the process of 'falsifiability' contribute to the strength and reliability of scientific knowledge? What is the function of cerebrospinal fluid? The thyroid gland secretes a hormone called: Which change of state is an example of sublimation? A farmer observes that his pea plants, which are legumes, are showing stunted growth and yellowish leaves despite regular watering and sunlight. A soil test indicates sufficient phosphorus and potassium but low nitrogen content. He recalls learning about certain invisible living organisms crucial for soil fertility. Identify the specific group of microorganisms most likely responsible for addressing this nitrogen deficiency in legume crops, and explain their unique role in making nitrogen available to the plants. What are the conditions necessary for rusting to occur? In scientific investigations, what is the primary purpose of collecting quantitative data rather than just qualitative observations?