Name five objects each which can be made from the following materials :
(a) Wood (b) Cotton (c) Leather (d) Paper
Important Questions on Sorting Materials into Groups
Classify the following into materials having lustre (shine) and those having no lustre (no shine): Gold pendant, Wooden table, Sand, Aluminium sheet, Glass mirror, Sheet of paper, Leather sofa, Brass door handle, Stainless steel tumbler, Jute bag.
Classify the following into transparent, translucent and opaque materials :
Butter paper, Cardboard, Ground glass, Clear glass, Water, Air, Brick wall, Aluminium sheet
Classify the following into hard materials and soft materials: Cotton, Iron, Diamond, Chalk, Wood, Wax, Clay, Sponge, Bone, Feathers
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?
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.
What is meant by hard materials and soft materials? Give two examples of hard materials and two of soft materials.
