Q.1. Name the property in which steel and sponge differ from each other.
Q.2.
Name one liquid which is miscible with water and another which is immiscible with water.
Q.3.
Name two gases which dissolve in water to some extent.
Q.4.
Which of the following liquids form a single layer on mixing?
Water and Kerosene or Water and Glycerine
Q.5.
State whether kerosene and petrol form a 'single layer' or 'two layers' on mixing.
Q.6.
What name is given to those materials:
(a) through which we cannot see at all?
(b) through which we can see clearly?
(c) through which we cannot see clearly?
Q.7.
Name two objects made from transparent materials.
Q.8.
Name two objects made from opaque materials.
Q.9.
Name two transparent liquids.
Q.10.
Name the two main groups into which all the objects around us can be classified.
Q.11.
Name the two groups into which all the living things can be classified.
Q.12.
Name two naturally occurring materials and two man-made materials.
Q.13.
Name two materials having lustre (shiny appearance).
Q.14.
Name two materials without lustre (having dull appearance).
Q.15.
Select those objects from the following which shine:
Glass bowl, Plastic toy, Steel spoon, Cotton shirt, Diamond ring
Q.16.
Name two materials which are lighter than water and two which are heavier than water.
Q.17.
State whether the following statements are true or false:
(a) Chalk dissolves in water.
(b) Sugar does not dissolve in water.
(c) Oil mixes with water.
(d) Sand settles down in water.
(e) Vinegar dissolves in water.
(f) A notebook has lustre.
(g) A piece of wood floats on water.
(h) Stone is transparent whereas glass is opaque.
Q.18.
Fill in the following blanks with suitable words:
(a) Mustard oil and water are .................. liquids.
(b) Water and milk are .................. liquids.
(c) A piece of glass is transparent but a piece of cardboard is .............. .
Q.19.
Name two materials which float on water and two which sink in water.
Q.20.
Which of the following materials are 'heavier than water' and which 'lighter than water' ?
Wood, Chalk, Oil, Kerosene, Iron, Copper, Ice, Aluminium, Plastic, Stone
Q.21.
Which of the following materials will float on water and which will sink in water?
An iron nail, A plastic toy, A cube of ice, Saw-dust, Sand, Dry leaves.
Q.22.
(a) Name two solid materials which are soluble in water.
(b) Name two solid materials which are insoluble in water.
Q.23.
Which of the following are soluble in water and which are insoluble in water?
Groundnut oil, Potassium permanganate, Alum, Wax, Sugar, Sand, Petrol, Nitrogen, Oxygen, Copper sulphate, Methane
Q.24.
Classify the following into hard materials and soft materials:
Cotton, Iron, Diamond, Chalk, Wood, Wax, Clay, Sponge, Bone, Feathers
Q.25.
What is the importance of oxygen gas dissolved in water? How is the carbon dioxide gas dissolved in water helpful to the plants which live in water?
Q.26.
(a) What is a material? Give five examples of materials.
(b) Classify the following objects on the basis of the nature of their material:
Cricket bat; Pressure cooker; Beaker; One rupee coin; Book; Screw; Drawing sheet; Mirror; Calendar; Table.
Q.27.
What is meant by hard materials and soft materials? Give two examples of hard materials and two of soft materials.
Q.28.
What is meant by transparent materials, translucent materials and opaque materials? Give two examples each of transparent, translucent and opaque materials.
Q.29.
(a) State one difference between living objects and non-living objects.
(b) Classify the following objects as living and non-living objects:
Ball pen; Child; Note-book; Rabbit; Chair; Sparrow; Coconut tree; Stone; Fish; Football.
Q.30.
(a) Mention one difference between plants and animals.
(b) Classify the following objects as 'plants' and 'animals’:
Mosquito; Mushroom; Rat; Goat; Lotus; Paddy; Frog; Algae; Snail; Snake.
Q.31. Name two objects each which can be made from the following materials:
(a) Glass (b) Iron (c) Copper (d) Aluminium
Q.32. Name five objects each which can be made from the following materials:
(a) Wood (b) Cotton (c) Leather (d) Paper
Q.33. Classify the following into materials having lustre and those having no lustre:
Gold pendant, Wooden table, Sand, Aluminium sheet, Glass mirror, Sheet of paper, Leather sofa, Brass door handle, Stainless steel tumbler, Jute bag.
Q.34. Classify the following into transparent, translucent and opaque materials:
Butter paper, Cardboard, Ground glass, Clear glass, Water, Air, Brick wall, Aluminium sheet
Q.35. Separate the following into natural materials and man-made materials:
Nylon, Water, Coal, Paper, Wood, Wool, Plastic, Glass, Steel, Gold
Q.36. Name two materials each which can be used for making the following objects:
(a) Chair (b) Clothes (c) Coins (d) Utensils (e) Shoes
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