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The rainwater and from other sources such as rivers and ponds seeps through the and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called .

The rainwater and water from other sources such as rivers and ponds seeps through the soil and fills the empty... View Article

State whether the following statements are true or false. If false, give the correct statement. (a) The process of seeping of water into the ground is called filtration. (b) 51% of the earth’s surface is covered with water. (c) The year 2003 was observed as the International Year of Freshwater. (d) Snow and ice both are solid forms of water.

(a) False, it is called infiltration Rainwater gets absorbed into the ground through the process of infiltration. The level of... View Article

What is the source of water in each of the following? (a) Wells (b) Ground (c) Atmosphere

Water is one of the natural resources, which are found in an adequate amount. It is an essential source for... View Article

Some definitions are given below which can be corrected by changing one word. Correct them. (a) An aquifer is a groundwater stored between layers of hard rock above the water table. (b) The process of evaporation of water in the ground is called infiltration. (c) The evaporation of water from oceans and its arrival back into oceans is called vapour cycle.

(a) Aquifer is groundwater stored between layers of hard rock below the water table. When we dig into the ground, we encounter... View Article

State whether the following statements are True or False. If false, write the correct statement. (a) Water vapour is the gaseous form of water. (b) Ice is solid whereas snow is the semi-solid form of water. (c) Ocean water cannot be used for domestic purposes. (d) The rapid growth of industries is one of the causes of water shortage.

a) True Explanation Water can exist in 3 different physical states – solid, liquid, and gaseous. In the solid state, water... View Article

Which of the following inhibits the seepage of rainwater into the ground? (a) A pukka floor (b) Playground (c) Grass lawn (d) Forest land

a) A Pucca floor Explanation The seepage of water is not possible in the case of pucca floors and concrete floors.... View Article

Water cycle does not involve which of the following? (a) Evaporation (b) Condensation (c) Formation of clouds (d) Rainwater harvesting

(d) Rainwater harvesting Explanation Rainwater harvesting is the simple process or technology used to conserve Rainwater by collecting, storing, conveying... View Article

“Every Drop Counts” is a slogan related to (a) counting of drops of any liquid. (b) counting of water drops. (c) importance of water. (d) importance of counting.

c) Importance of water Explanation The slogan ‘every drop counts’ completely refers to the importance of water on this planet.... View Article

The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene per person per day is a minimum of (a) 5 litres (b) 15 litres (c) 30 litres (d) 50 litres

a) 50 litres, two and a half Explanation The amount of water recommended by the United Nations for drinking, washing,... View Article

On which of the following day is World Water Day observed? (a) 22 March (b) 14 November (c) 2 October (d) 21 December

a) 22 March Explanation Water is one of the most important resources gifted to us after air. It forms the... View Article

Which of the following is a way to use water economically? (a) Construction of bawris (b) Rainwater harvesting (c) Drip irrigation (d) Infiltration

c) Drip irrigation Explanation Drip irrigation is the most economical way to use water since all the nutrients of the... View Article

A man digging the ground near a water body found that the soil was moist. As he kept digging deeper and deeper he reached a level where all the spaces between particles of soil and gaps between rocks were filled with water. The upper limit of this layer is called (a) water level. (b) water table. (c) groundwater. (d) water limit.

c) water table Explanation The upper limit of this layer where water is present between particles of soil and gaps... View Article

Which of the following are not the liquid forms of water? (i) Snow (ii) Lake water (iii) River water (iv) Water vapour (v) Ice Choose the correct combination from the options below. (a) (i), (iv) and (v) (b) (i) and (ii) (c) (ii) and (iii) (d) (iv) only

a) (i), (iv) and (v) Explanation Snow and ice are solid forms of water whereas water vapour is a gaseous... View Article

Seas and oceans are full of water on earth. However, a very small percentage of water present on earth is available for us. This percentage is roughly (a) 0.006%. (b) 0.06%. (c) 0.6%. (d) 6%.

a) 0.006% Explanation The total amount of fresh water available for use is about 0.006% of the total water present... View Article

Which of the following does not show water shortage? (a) Taps running dry. (b) Long queues for getting water. (c) Marches and protests for the demand of water. (d) A family gets three buckets of water per person per day.

(d) A family gets three buckets of water per person per day. Explanation The amount of water available per person... View Article

Describe the life history of silk moth with the help of figures of various stages.

Firstly the female silk moth lays eggs from which larvae come out. These larvae are known as caterpillars or silkworms.... View Article

Write various steps for processing fibres into wool.

Step I: The fleece of the sheep along with a thin layer of skin is removed from its body This... View Article

Explain the phrase – “Unity is Strength” on the basis of the making of fabric from the fibre.

Fibres can be generally defined as the thread-like structures that are thin, long, and flexible strands. The two main sources... View Article

Paheli went to the market to buy sarees for her mother. She took out a thread from the edge of the two sarees shown by the shopkeeper and burnt them. One thread burnt with a smell of burning hair and the other burnt with the smell of burning paper. Which thread is from a pure cotton saree and which one from a pure silk saree? Give a reason for your answer.

The thread which burns with a smell of burning hair is from pure silk. This is because silk and hair... View Article

Complete the paragraph related to the life history of silk moth by filling in the blanks. The __(a)_ silk moth lays _(b)_, from which hatch __(c)_ called _(d) or _(e)__. They grow in size and when the caterpillar is ready to enter the next stage of its life history called _(f)__, it first weaves a covering to hold itself, which is known as _(g)____.

The (a) female silk moth lays (b) eggs, from which hatch (c) larvae called (d) caterpillars or (e) silkworms. They... View Article

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