Science Class 7

Adolescence: A Stage of Growth and Change Short Questions 1. What is adolescence? Answer:Adolescence is the stage between childhood and adulthood, usually from 10 to 19 years. 2.What are secondary sexual characteristics? Answer: They are physical changes that distinguish males from females but are not directly involved in reproduction. 3.What is puberty? Answer: Puberty is […]

Changes Around Us: Physical and Chemical Short Questions 1. What is a physical change? Answer: A change where no new substance is formed, like melting ice. 2.What is a chemical change? Answer: A change where new substances are formed, like burning wood. 3.Is melting ice a physical or chemical change? Answer: Physical change. 4.What happens […]

The World of Metals and Non-metals Short Questions 1. What is the property of metals that allows them to be beaten into thin sheets? Answer: Malleability 2.Which metal is used in thermometers because it is liquid at room temperature? Answer: Mercury 3.What is the ringing sound produced by metals called? Answer: Sonority 4.Which non-metal is […]

Electricity: Circuits and their Components Short Questions 1. What is an electric cell? Answer: A portable source of electrical energy. 2.What are the two terminals of an electric cell called? Answer: Positive (+ve) and negative (–ve). 3.What is a battery? Answer: A combination of two or more electric cells. 4.What makes an incandescent lamp glow? […]

Exploring Substances: Acidic, Basic, and Neutral Short Questions 1. What is an acid? Answer: An acid is a substance that turns blue litmus paper red. 2.What is a base? Answer: A base is a substance that turns red litmus paper blue. 3.What is a neutral substance? Answer: A neutral substance does not change the color […]

The Ever-Evolving World of Science Short Questions 1.  Why do some fruits taste sour? Answer: Because they contain acids. 2. What makes a lamp glow? Answer: Electricity flowing through a bulb. 3.Can ice melting be reversed? Answer: Yes, by freezing water. 4.How does water from the sea become rain? Answer: It evaporates and forms clouds. […]

Chapter 1 – The Ever-Evolving World of Science Chapter 2 – Exploring Substances: Acidic, Basic, and Neutral Chapter 3 – Electricity: Circuits and their Components Chapter 4 – The World of Metals and Non-metals Chapter 5 – Changes Around Us: Physical and Chemical Chapter 6 – Adolescence: A Stage of Growth and Change Chapter 7 […]

Notes Science New Book 2025-26 Notes Science Curiosity Notes Science Old Book Notes Class 7 Science

Earth, Moon, and the Sun 1. Rotation of the Earth Earth spins on its axis (through North and South Poles) every 24 hours. Rotates anti-clockwise (West to East) when viewed from above the North Pole. Effects: Causes day and night: Side facing the Sun has day; opposite side has night. Sun appears to rise in […]

Light: Shadows and Reflections 1. Sources of Light Luminous Objects: Produce their own light (e.g., Sun, stars, fireflies, bulbs). Non-Luminous Objects: Reflect light from other sources (e.g., Moon reflects sunlight). Natural Sources: Sun, stars, lightning. Artificial Sources: Fire, candles, LED bulbs. LED Lamps: Energy-efficient, long-lasting, eco-friendly; must be recycled. 2. Light Travels in a Straight […]