Free detailed NCERT Study Notes for CBSE Class 7 Science, Questions with Solutions, Sample Test Papers & Worksheets based on NCERT Books & Syllabus.
After reading these Class 7 Science Revision Study Notes, you can take a quick Online Test to check your understanding of the subject & chapters like Plant Nutrition, Nutrition in Animals, Fibre to Fabric, Acids, Bases & Salts, Physical & Chemical Changes, Heat, Soil, Respiration in Organisms, Transportation in Animals & Plants, Motion & Time, Electric Current & it's Effects, Weather, Climate & Adaptations, Winds, Storms & Cyclones, Light, Water, Forest and The Waste Water Story to score better marks.
IMPORTANT TERMS
Carnivores - Animals which eat only flesh of other animals as their food.
Herbivores - Animals which eat only plants as their food.
Omnivores - Those animals which can eat both plants as well as animals.
Parasite - A plant or organism that lives on or inside other organism Read more...
IMPORTANT TERMS
Carnivores- Animals which eat only flesh of other animals as their food.
Herbivores- Animals which eat only plants as their food.
Omnivores- Those animals which can eat both plants as well as animals.
Parasite- A plant or organism that lives on or inside other organism and derives its food from that organism. Read more...
HEAT
IMPORTANT TERMS
Thermometer A device that is used to measure temperature.
Joule The SI unit of heat is Joule (J).
Conductors Substances that allow heat to pass through them. E.g. Aluminium
Insulators Substances that do not allow heat to pass through them. E.g. Wood
Sea Breeze The wind blowing from sea towards Read more...
Respiration in Organisms
IMPORTANT TERMS
Anaerobes Organisms which can survive in the absence of air.
Breathing Rate The number of times a person breathes in a minute is termed as the breathing rate.
Stomata Tiny pores for exchange of gases in plants.
Lenticels Pores in the stems or branches of a plant that help Read more...
Transportation in Animals and Plants
IMPORTANT TERMS
Pulse The throbbing sensation that occurs in the arteries due to the flow of blood is called pulse.
Plasma The fluid part of the blood is known as plasma.
Heartbeat The rhythmic contraction and relaxation of the muscles of heart constitute a heartbeat.
Haemoglobin A red-coloured pigment Read more...
FIBRE TO FABRIC
IMPORTANT TERMS
Fleece The thick coat of hair on the body of wool-yielding animals.
Filaments A thread like structure secreted by silkworms.
Cocoon The covering of silk fibres by which a caterpillar wraps itself.
Pashmina The fur obtained from the Kashmiri goat is known as Read more...
Reproduction in Plants
IMPORTANT TERMS
Unisexual flower A flower that contains either male or female gametes.
Bisexual flower A flower that contains both male and female reproductive cells.
Gametes The male and female reproductive cells are together known as gametes.
Fertilisation The fusion of male and female gametes is known as fertilisation.
Zygote The cell which results Read more...
Water: A Precious Resource
IMPORTANT TERMS
Aquifer Water reservoir formed above the impervious layers of rock; Underground water is also known as an aquifer.
Infiltration The process of seeping of surface water into the ground is called Infiltration.
Water Table The top level of the underground water is called the water table.
Surface Water Water Read more...
Weather, Climate and Adaptations
IMPORTANT TERMS
Camouflaging The ability of an organism to blend in with the surroundings.
Hibernation A period of reduced activity in animals during winter season.
Adaptation Changes by which an organism becomes better suited to its specific environment.
Migration Seasonal movement of a group of animals from its natural Read more...
Wastewater Story
IMPORTANT TERMS
Scum Lighter impurities that rise to the top and float during wastewater treatment.
Sludge Solids waste which settle at the bottom of tank during primary treatment of wastewater.
Skimmer A skimmer is used to remove floatable solids like oil and grease present in the wastewater.
Sewage Wastewater that is generated Read more...
Wind, Storms and Cyclones
IMPORTANT TERMS
Anemometer A device used to measure wind speed.
Wind Vane An instrument used to determine the direction of the moving wind.
Water Spout Tornadoes that are formed over the seas are called Water Spouts.
Wind The movement of air in the atmosphere is known as wind.
Typhoon In the Read more...
Electric Current and its Effects
IMPORTANT TERMS
Ampere The standard unit of electric current is ampere (A).
Ammeter A device used to measure electric current.
Electric circuit The unbroken path through which an electric current flows.
Solenoid A coil of wire in cylindrical form which when carrying a current acts like a magnet.
Switch A switch Read more...
LIGHT
IMPORTANT TERMS
Light: - It is a form of electromagnetic wave which is responsible for sense of sight.
Mirror: - Mirror is a highly polished surface that reflects light and produces an image of whatever is placed in front of it.
Lens: - Lens is made of two transparent surfaces in which at Read more...
MOTION AND TIME
IMPORTANT TERMS
Motion: - Motion is change in position of an object over a time.
Linear Motion: - It is a motion along straight line. It is also called rectilinear motion.
Circular Motion: - Movement of an object on a circular path is called circular motion.
Periodic Motion: - It is a Read more...
SOIL
IMPORTANT TERMS
Soil: - Soil is a natural resource that is essential for life. Soil is essential for the growth of land plants. It is a shelter for many organisms.
Weathering: - Soil is formed when rocks are broken down by the action of wind, water, temperature and humidity. This process is Read more...
ACIDS, BASES AND SALTS
Acid: - Word acid has been derived from a Latin word ‘acidus’ which means sour. The substances that taste sour are called acidic substances. e.g. vinegar, lemon, curd etc.
Base: - Bases are those substances which are bitter in taste. The substances that that taste bitter are called Read more...
Forests - Our Lifeline
IMPORTANT TERMS
Autotrophs Organisms which can make their food by the process of photosynthesis.
Heterotrophs Organisms which depend directly or indirectly on plants for their food. E.g. Rabbit, Lion.
Saprotrophs Organisms which feed on dead and decaying organic materials. e.g. Bacteria
Decomposers Microorganisms which convert dead plants and animals tissues to Read more...
Physical and Chemical Changes
IMPORTANT TERMS
Compound A substance that is formed when two or more elements combine chemically.
Mixture A mixture consists of two or more substances simply mixed together, but not chemically combined.
Rusting Depositing of a reddish brown layer on iron objects is known as rusting.
Crystallization The process by which an Read more...
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