Wastewater Story 7th Class NCERT CBSE Science Chapter 18 Question: Wastewater is fit for human consumption or not. Give reason to support your answer. Answer: No, because it is dirty and has many diseases causing organisms like cholera, typhoid etc. Question: Name two chemicals used to disinfect wastewater. Answer: Chlorine and ozone …
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Forests: Our Lifeline 7th Class NCERT CBSE Science Chapter 17 Question: List some animals which live in deeper areas of the forest. Answer: Boars, bison, jackals, porcupines, elephants, etc., live in the deeper areas of the forest. Question: Paheli while moving in a forest observed that there was no noise pollution, though …
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Water: A Precious Resource 7th Class NCERT CBSE Science Chapter 16 Question: Suggest one traditional way of storing water from ancient time. Answer: In ancient times, people used to make Bawris to store water. Question: What is the source of water in each of the following? Wells Ground Atmosphere Answer: The source …
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Light 7th Class NCERT CBSE Science Chapter 15 Question: Briefly mention whether mirror change the direction of light. Answer: Yes, when a ray of light is incident on the mirror surface, then the mirror changes the direction of light. Question: The image formed by a lens is always virtual, erect and smaller …
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Electric Current and its Effects 7th Class NCERT CBSE Science Chapter 14 Question: Mention the name of the two devices that work on the basis of magnetic effects of current. Answer: The devices that work on the basis of magnetic effects of current are loudspeaker and electric bell. Electric Current and its …
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Motion and Time 7th Class NCERT CBSE Science Chapter 13 Question: Give the basic unit of speed. Answer: Metre / second is the basic unit of speed. Motion and Time NCERT – Question: Mention which is the most common thing in almost all the clocks. Answer: The most common thing in almost …
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Reproduction in Plants 7th Class NCERT CBSE Science Chapter 12 Question: Why is the process of reproduction necessary? Answer: The process of reproduction is necessary for the perpetuation and preservation of species and to increase the number of members of species. Question: If the filament of Spirogyra is broken into fragments. What …
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Transportation in Animals and Plants 7th Class NCERT CBSE Science Chapter 11 Question: Name some useful products or materials that are carried by blood. Answer: Food, water and oxygen are the products that are carried by blood to every part of the body. Question: Circulatory system consists of three major organs. Name …
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Respiration in Organisms 7th Class NCERT CBSE Science Chapter 10 Question: What are the end products of aerobic respiration. Answer: During aerobic respiration, carbon dioxide and water are released along with a large amount of energy. Question: The cellular respiration process takes place in which cell organelle? Answer: Cellular respiration takes place …
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Soil 7th Class NCERT CBSE Science Chapter 09 Question: In how many groups the soil has been categorized? Name them. Answer: The soil has been categorized into four major groups, i.e. clay silt sand gravel Question: Which soil is considered to be the most fertile and used for growing crops? Answer: Loamy …
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Class Notes NCERT Solutions for CBSE Students