Exercise 1. (a) Which kind of garbage is not converted into compost by the red worms? (b) Have you seen any other organisms besides red worms in the pit? If yes, try to find out their names. Draw pictures of these. Answer: a) Pieces of cloth, polythene bags, broken glass, aluminium wrappers, nails and broken…
Exercise 1. What is the composition of air? Answer: Air comprises water vapour, oxygen, nitrogen, carbon dioxide, dust and smoke. 2. Which gas in the atmosphere is essential for respiration? Answer: Oxygen in the atmosphere is essential for respiration. 3. How will you prove that air supports burning? Answer: Place two candles of the same…
Exercise 1. Fill up the blanks in the following. (a) The process of changing of water into its vapour is called _________________. (b) The process of changing water vapour into water is called _________________. (c) No rainfall for a year or more may lead to _________________ in that region. (d) Excessive rains may cause _________________….
Exercise 1. Fill in the blanks in the following (i) Artificial magnets are made in different shapes such as __________, __________ and ____________. (ii) The materials which are attracted towards a magnet are called________. (iii) Paper is not a ______ material. (iv) In the olden days, sailors used to find direction by suspending a piece…
Exercise 1. Fill in the blanks : (a) A device that is used to break an electric circuit is called _______________. (b) An electric cell has _______________ terminals. Answer: (a) A device that is used to break an electric circuit is called switch. (b) An electric cell has two terminals. 2. Mark ‘True’ or ‘False’ for following statements:…
Exercise 1. Rearrange the boxes given below to make a sentence that helps us understand opaque objects. Answer: The given boxes can be rearranged to form ‘Opaque Objects Make Shadows’ as shown below 2. Classify the objects or materials given below as opaque, transparent or translucent and luminous or non-luminous: Air, water, a piece of…
Exercise 1. Give two examples each, of modes of transport used on land, water and air. Answer: Land – Train, Bus Water – Ship, Boat Air – Helicopter, Aeroplane 2. Fill in the blanks: (i) One metre is ______________ cm. (ii) Five kilometre is ______________ m. (iii) Motion of a child on a swing is…
1. What is a habitat? Answer: The place where organisms live is called the habitat. Habitat means a dwelling place (a home). The habitat provides food, water, air, shelter and other needs to organisms. 2. How is a cactus adapted to survive in a desert? Answer: Adaptations of a cactus are as follows: 3. Fill…
Exercise 1. Fill in the blanks. (a) Joints of the bones help in the ——————— of the body. (b) A combination of bones and cartilages forms the _______ of the body. (c) The bones at the elbow are joined by a ______________________ joint. (d) The contraction of the _____________ pulls the bones during movement. Answer:…
Exercise 1. Correct the following statements and rewrite them in your notebook. (a) Stem absorbs water and minerals from the soil. (b) Leaves hold the plant upright. (c) Roots conduct water to the leaves. (d) The number of petals and stamens in a flower is always equal. (e) If the sepals of a flower are…