Question: How is sound produced? Answer: Sound is produced by rapid to-and-fro movements called vibrations. Question: Distinguish between infrasonic and ultrasonic. Answer: Difference is as follows: Question: What do you mean by time period of a vibrating object? Answer: The time taken for one complete vibration or oscillation is called its time period. Question:What is …
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NCERT 8th Class (CBSE) Science: Sound – Quiz 26 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Sound – Quiz: Sound is produced by rapid to and fro movements, called vibrations. The maximum distance to which an oscillating or vibrating object moves from its central position is called amplitude. …
Read More »NCERT 8th Class (CBSE) Science: Conservation of Plants and Animals – Quiz
NCERT 8th Class (CBSE) Science: Conservation of Plants and Animals – Quiz 22 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Conservation of Plants and Animals – Quiz: Ecosystem consists of all the plants, animals and microorganisms in an area, along with all the non-living components, such as climate, …
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Question: What is biodiversity? Answer: Biodiversity is the variety of plants, animals and microorganisms generally found in an area. Question: What do you mean by flora and fauna? Answer: Flora: Species of all plants found in a particular area is known as flora of that area. Fauna: Species of all animals found in …
Read More »NCERT 8th Class (CBSE) Science: Combustion and Flame – Quiz
NCERT 8th Class (CBSE) Science: Combustion and Flame – Quiz 32 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Combustion and Flame – Quiz: Combustion is the process in which a substance burns in air or oxygen to produce heat and light. When a hydrocarbon fuel is burnt in …
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Question: What is combustion? Answer: The process of burning of substances in air or oxygen with the evolution of heat and light is known as combustion. Question: Distinguish between combustible and non-combustible substances, giving three examples of each. Answer: Question: Why is it more difficult to burn some combustible substances than others? Answer: Different substances …
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NCERT 8th Class (CBSE) Science: Coal and Petroleum – Quiz 22 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Coal and Petroleum – Quiz: Material found on the earth that allow the existence of life and satisfy the needs of living organisms are called natural resources. Renewable resources are …
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Question: Classify various materials we use in our lives. Answer: All the materials we use can be broadly classified into two groups: Natural Resources: Natural resources are those resources which are present in our nature, gifted by God. They can be freely used. Soil, air, sunlight, water, etc., are some natural …
Read More »NCERT 8th Class (CBSE) Science: Reaching the Age of Adolescence – Quiz
NCERT 8th Class (CBSE) Science: Reaching the Age of Adolescence – Quiz 19 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Reaching the Age of Adolescence – Quiz: The endocrine system consists of a number of ductless glands that secrete hormones. The hormones control several processes in the body. …
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Question: What do you understand by ‘puberty’? Answer: The stage of life when the body becomes capable of reproduction is known as puberty. Question: Why is looking after physical health more important at adolescent age? Answer: Walking, jogging, aerobics, outdoor games etc, are good for the growing adolescent body. Question: Discuss the …
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