Select the correct option in Questions 1 and 2. Question 1. Which of the following cannot be charged easily by friction? (a) A plastic scale (b) A copper rod (c) An inflated balloon (d) A woollen cloth. Solution 1. (b) A copper rod Question 2. When a glass rod is rubbed with a piece of […]
CLASS 8 Chapter 15 Some Natural Phenomena Read More »
Question 1. Fill in the blanks. (a) Most liquids that conduct electricity are solutions of, ______________ and ______________. (b) The passage of an electric current through a solution cause ______________ effects. (c) If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the ___________terminal of the battery. (d) The
CLASS 8 Chapter 14 Chemical Effects of Electric Current Read More »
Question 1. Choose the correct answer. Sound can travel through (a) gases only (b) solids only (c) liquids only (d) solids, liquids, and gases Solution 1. (d) solids, liquids, and gases Question 2. Voice of which of the following is likely to have a minimum frequency? (a) Baby girl (b) Baby boy (c) A man
CLASS 8 Chapter 13 Sound Read More »
Question 1. Fill in the blanks. (a) Friction opposes the _____________ between the surfaces in contact with each other. (b) Friction depends on the _____________ of surfaces. (c) Friction produces __________. (d) Sprinkling of powder on the carrom board ________ friction. (e) Sliding friction is ___________ than the static friction. Solution 1. (a) Friction opposes
CLASS 8 Chapter 12 Friction Read More »
Question 1. Give two examples each of situations in which you push or pull to change the state of motion of objects Solution 1. Examples of situations in which you push or pull to change the state of motion of objects. Following are the situations in which we pull to change the state of motions:
CLASS 8 Chapter 11 Force and Pressure Read More »
Question 1. What is the term used for chemical secretions of endocrine glands responsible for changes taking place in the body? Solution 1. Hormones is the term used for chemical secretions of endocrine glands responsible for changes taking place in the body. Question 2. Define adolescence. Solution 2. The transition from adulthood to puberty is called
CLASS 8 Chapter 10 Reaching the Age of Adolescence Read More »
Question 1. Explain the importance of reproduction in organisms. Solution 1. The following are the importance of reproduction in organisms: In this process living organisms give birth to their offspring. It helps in maintaining and increasing the population of the species. Reproduction is important for the survival of all living things. Question 2. Describe the
CLASS 8 Chapter 9 Reproduction in Animals Read More »
Exercise Questions Question 1. Indicate whether the following statements are True (T) or False (F). (a) Unicellular organisms have a one-celled body. (T/F) (b) Muscle cells are branched. (T/F) (c) The basic living unit of an organism is an organ. (T/F) (d) Amoeba has irregular shape. (T/F) Solution 1. a) Unicellular organisms have one-celled bodies.
CLASS 8 Chapter 8 Cell- Structure and Functions Read More »
Exercise 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. Solution 1. (a) A place where animals are protected in
CLASS 8 Chapter 7 Conservation of Plants and Animals Read More »
Question 1. List conditions under which combustion can take place. Solution 1. Combustion can take place under the following conditions. In presence of oxygen In presence of a combustible substance Acquisition of ignition temperature Question 2. Fill in the blanks. (a) Burning of wood and coal causes _____ of air. (b) A liquid fuel, used
CLASS 8 Chapter 6 Combustion and Flame Read More »
