Question 1. What are the advantages of using CNG and LPG as fuels? Solution 1. The following are the advantages of using compressed natural gas (CNG) and liquid petroleum gas as fuels; They have low prices They are easily available. They do not cause any pollution as they burn with smokeless flame. They leave no …
Question: 1. Explain why some fibres are called synthetic. Answer: Some fibres are called as synthetic fibres because these are not obtained naturally, but are man-made fibres manufactured by using chemicals. These comprise of small units joined together to form long chains. Examples are PVC, rayon, Dacron, polyester etc. Question: 2. Mark the correct answer: …
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 the soil. (c) Alcohol is produced with the help of __________. (d) Cholera is caused by __________. Answer: (a) Microorganisms can be seen with …
CLASS 8 Chapter 2 Microorganisms : Friend and Foe Read More »
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 is _____________ of the soil. (c) Damaged seeds would _____________ …
CLASS 8 Chapter 1 Crop Production and Management Read More »
Question 1. Fill in the blanks: (a) Cleaning of water is a process of removing ____________. (b) Wastewater released by houses is called ____________. (c) Dried ____________ is used as manure. (d) Drains get blocked by ____________ and ____________. Solution 1. (a) Cleaning of water is a process of removing pollutants. (b) Wastewater released by houses …
Question 1. Explain how animals dwelling in the forest help it grow and regenerate. Solution 1. Animals dwelling in the forest help it grow and regenerate in the following ways Animals help in dispersal of seeds. Decaying dung of animals provides nutrients for plants to grow Microorganisms prepare humus from dead plants and animals. Question …
Question 1. Mark ‘T’ if the statement is true and ‘F’ if it is false: (a) The freshwater stored in the ground is much more than that present in the rivers and lakes of the world. (T/F) (b) Water shortage is a problem faced only by people living in rural areas. (T/F) (c) Water from …
Question 1. Fill in the blanks: (a) An image that cannot be obtained on a screen is called ____________. (b) Image formed by a convex __________ is always virtual and smaller in size. (c) An image formed by a __________ mirror is always of the same size as that of the object. (d) An image …
Exercise Questions Question 1. Classify the following as motion along a straight line, circular or oscillatory motion: (i) Motion of your hands while running. (ii) Motion of a horse pulling a cart on a straight road. (iii) Motion of a child in a merry-go-round. (iv) Motion of a child on a see-saw. (v) Motion of …
