Chapter 7 Conservation of Plants and Animals
Chapter 7 Conservation of Plants and Animals Textbook Questions Question 1. Fill in the blanks. (a) A place where animals are protected in their natural habitat is called ______ (b) Species found only in a particular area is known as ______ (c) Migratory birds fly to faraway places because of ________ changes. Answer: (a) Wildlife […]
Chapter 6 Combustion and Flame
Chapter 6 Combustion and Flame Textbook Questions Question 1. List conditions under which combustion can take place. Answer: Combustion can take place in the presence of: (a) a combustible substance. (b) oxygen, that is, the supporter of combustion. (c) attainment of ignition temperature of the substance. Question 2. Fill in the blanks. (a) Burning of […]
Chapter 5 Materials Coal and Petroleum
Chapter 5 Materials Coal and Petroleum Textbook Questions Question 1. What are the advantages of using CNG and LPG as fuels? Answer: The advantages of using CNG and LPG as fuels are: They burn with a smokeless flame and so does not cause any pollution. They leave no ash on burning. They are easy to […]
Chapter 4 Materials Metals and Non Metals
Chapter 4 Materials Metals and Non Metals Textbook Questions Question 1. Which of the following can be beaten into thin sheets? (a) Zinc (b) Phosphorus (c) Sulphur (d) Oxygen Answer: (a) Zinc Question 2. Which of the following statements is correct? (a) All metals are ductile. (b) All non-metals are ductile. (c) Generally, metals are […]
Chapter 3 Synthetic Fibers and Plastics
Chapter 3 Synthetic Fibers and Plastics Textbook Questions Question 1. Explain why some fibres are called synthetic. Answer: Some fibres are called synthetic fibres because they are made by man using chemicals. Question 2. Mark (✓) the correct answer. Rayon is different from synthetic fibres because (a) it has a silk-like appearance. (b) it is […]
Chapter 2 Microorganisms Friend and Foe
Chapter 2 Microorganisms Friend and Foe Textbook Questions Question 1. Fill in the blanks. (a) Microorganisms can be seen with the help of a _____ (b) Blue-green algae fix ______ directly from the air to enhance the fertility of soil. (c) Alcohol is produced with the help of _____ (d) Cholera is caused by ______ […]
Chapter 1 Crop Production and Management
Chapter 1 Crop Production and Management NCERT Textbook Questions Question 1. Select the correct word from the following list and fill in the blanks. float, water, crop, nutrients, preparation (a) The same kind of plants grown and cultivated on a large scale at a place is called _____ (b) The first step before growing crops […]