Chapter 18 Wastewater Story
Chapter 18 Wastewater Story Q.1. Fill in the blanks: (a) Cleaning of water is process of removing __________ (b) Wastewater released by houses is called __________. (c) Dried __________ is used as manure. (d) Drains get blocked by __________ and __________. Ans.(a) pollutants (b) sewage (c) sludge (d) (d) chemicals, kitchen waste Q.2. What is […]
Chapter 17 Forests Our Lifeline
Chapter 17 Forests Our Lifeline Q.1. Explain how animals dwelling in the forest help it grow and regenerate. Ans. Animals help in growing and regenerating forests in many ways. Animals work as the cleaning agents in the forest. Microorganisms work on dead bodies of plants and animals and degenerate them. An’imals also help in pollination […]
Chapter 16 Water A Precious Resource
Chapter 16 Water A Precious Resource Q.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 […]
Chapter 15 Light
Chapter 15 Light Q.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) […]
Chapter 14 Electric Current and its Effects
Chapter 14 Electric Current and its Effects Q.1.Draw in your notebook the symbols to represent the following components of electrical circuits: connecting wires, switch in the ‘OFF’ position, bulb, cell, switch in the ‘ON’ position and battery. Ans. Q.2.Draw the circuit diagram to represent the circuit shown in fig. 14.9. Ans. Q.3.Fig. 14.11 shows four […]
Chapter 13 Motion and Time
Chapter 13 Motion and Time Q.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. […]
Chapter 12 Reproduction in Plants
Chapter 12 Reproduction in Plants Q.1.Fill in the blanks: (a) Production of new individuals from the vegetative part of parent is called ___________. (b) A flower may have either male or female reproductive parts. Such a flower is called _______. (c) The transfer of pollen grains from the anther to the stigma of the same […]
Chapter 11 Transportation in Animals and Plants
Chapter 11 Transportation in Animals and Plants Q.1.Match structures given in Column I with functions given in Column II. Ans. Q.2.-Fill in the blanks : (i) The blood from the heart is transported to all parts of the body by the _____________ (ii) Haemoglobin is present in ___________ cells. (iii) Arteries and veins are joined […]
Chapter 10 Respiration in Animals and Plants
Chapter 10 Respiration in Animals and Plants Q1. Why does an athlete breathe faster and deeper than usual after finishing the race? Answer: During the run, the demand of energy is high but the supply of oxygen to produce energy is limited. Therefore, anaerobic respiration takes places in the muscle cells to fulfill the demand […]
Chapter 9 Soil
Chapter 9 Soil Q1. Tick the most suitable answer in question 1 and 2. In addition to the rock particles, the soil contains (i) Air and water (ii) Water and plants (iii) Minerals, organic matter, air and water (iv) Water, air and plants Answer: In addition to the rock particles, the soil contains (iii) Minerals, […]