Q. What are the several types of physical changes? Melting, Freezing, Evaporation, Condensation, Sublimation, Deposition. Top Answer Solution:Change in State (Phase Change) Related Links
Q. What is the Big Bang Theory? Top Answer Solution:The Big Bang Theory explains how the universe began. The Big Bang Theory says the universe started about 13.8 billion years ago from a very small, hot, and dense point. Then it…
Q. What is an ecosystem? Top Answer Solution:An ecosystem is a community of living things (like plants, animals, and microorganisms) and non-living things (like water, air, and soil) that interact with each other in a specific area. It’s like nature’s…
Q. What are the differences between an atom and a molecule? Top Answer Atom Molecule An atom is the smallest unit of an element. It cannot be broken down further while keeping its chemical properties. A molecule is formed when…
Q. What is cloning? Top Answer Solution:Cloning is the process of creating an exact copy of a living thing. The copy, called a clone, has the same genetic material (DNA) as the original. Cloning can happen naturally or be done…
Q. What is a magnet? Top Answer Solution:A magnet is an object that can attract certain materials, like iron, nickel, and cobalt. It produces a magnetic field, which is an invisible force that pulls objects toward it. Magnets are used…
Q. What is the greenhouse effect? Top Answer Solution:The greenhouse effect is a natural process that keeps the Earth warm enough for us to live. It happens when certain gases in the atmosphere, called greenhouse gases, trap heat from the…
Q. What is refraction? Top Answer Solution:Refraction is the bending of light when it moves from one material to another. This happens because light changes its speed as it passes through different materials. Each material, like air, water, or glass,…
Q. What are acids and bases? Top Answer Solution:An acid is a substance that tastes sour (like lemon juice), can turn blue litmus paper red, and reacts with some metals to produce bubbles (hydrogen gas). Acids release hydrogen ions (H⁺)…
Q. What is the periodic table? Top Answer Solution:The periodic table is a chart that shows all the chemical elements in an organized way. It is arranged based on atomic number, which tells how many protons an atom has. For example,…
Q. What is a chemical reaction? Top Answer Solution:A chemical reaction happens when two or more substances combine and change into something new. For example, when vinegar and baking soda are mixed, they react to form carbon dioxide bubbles. Another example…
Q. What is the difference between renewable and non-renewable energy? Top Answer Solution:Renewable energy: It comes from natural sources like the sun, wind, and water, which never run out. For example, solar panels use sunlight to produce electricity. Non-renewable energy:…
Q. What is an electric current? Top Answer Solution:Electric current is the flow of tiny particles called electrons through a conductor like a wire. It is similar to water flowing in a pipe. Just as water moves to carry energy,…
Q. What is Ohm’s Law? Top Answer Solution:Ohm’s Law explains the relationship between voltage, current, and resistance in an electric circuit. If you increase the voltage in a circuit, the current will increase too, but if resistance is high, the current…
Q. Why is the sky blue? Top Answer Solution:The sky appears blue because sunlight has many colors, and blue light has the shortest wavelength. When sunlight hits the atmosphere, blue light scatters in all directions by air molecules. That is…
Q. What is the difference between mitosis and meiosis? Top Answer Mitosis Meiosis A type of cell division where one cell splits into two identical cells. It happens in body cells for growth or to heal wounds. For example, your…
Q. What is the human digestive system? Top Answer Solution:The digestive system is a group of organs that break down food into smaller parts so the body can use it for energy and growth. How the digestive system works?1. Mouth:…
Q. What are Newton’s three laws of motion? Top Answer Solution:First Law: A thing at rest stays at rest, and a thing in motion stays in motion unless an external force acts on it. For example, a ball on the ground…
Q. What is photosynthesis? Top Answer Solution:Photosynthesis is the process by which green plants make their own food. They use sunlight, carbon dioxide (CO₂) from the air, and water (H₂O) from the soil to produce glucose (a type of sugar)…
