It was Paheli's birthday. Her grandmother gave her two gifts made up of metals, one old dull silver spoon and a pair of lustrous gold ear-rings. She was surprised to see the difference in the appearance of the two metals. Can you explain the reason for this difference?

Give the name of two objects each which can be made from the following materials.
(a) Glass
(b) Iron
(c) Gold
(d) Aluminium

Give three common characteristics of materials.

You are provided with the following materials: Turmeric, honey, mustard oil, water, glucose, rice flour, groundnut oil.
Make any three pairs of substances where one substance is soluble in the other and any three pairs of substances where one substance remains insoluble in the other substance.

Given below are the names of some objects and materials:
Water, basket ball, orange, sugar, globe, apple and earthen pitcher. Group them as
(a) round shaped and other shapes.
(b) eatables and non-eatables.

Do gases also dissolve in water?

Are vinegar and lemon juice soluble or insoluble in water?

Mixtures of red chilli powder in water, butter in water, petrol in water and honey in water were given to Radha, Sudha, Sofia and Raveena respectively. Whose mixture is in solution form?

During summer holidays, a group of children collected a lump of salt, green grass, broken glass piece, a small thermocol box, pen, iron nail, glass. marbles, hair, naphthalene ball, a piece of sugar candy (mishri) and tried to group them on the basis of properties given in table. Help them in filling the table.

Chalk, iron nail, wood, aluminium, candle, cotton usually look different from each other. Give some properties. by which we can prove that these materials are different.

Sugar, salt, mustard oil, sand, sawdust, honey, chalk powder, petals of flower, soil, copper sulphate crystals, glucose, wheat flour are some substances given to Paheli. She wants to know whether these substances are soluble in water or not. Help her in identifying soluble and insoluble substances in water.

Which of the following statements is not true?

Which type of the following materials is used for making the front glass (wind screen) of a car?

Find the odd one out from the following.

You are provided with the following materials.
(i) Magnifying glass
(ii) Mirror
(iii) Stainless steel plate
(iv) Glass tumbler
Which of the above materials will you identify as transparent?

Which pair of substances among the following would float in a tumbler half-filled with water?

While doing an activity in class, the teacher asked Paheli to handover a translucent material. Which among the following materials will Paheli pick and give her teacher?

Boojho found a bag containing the following materials.
(i) Mirror
(ii) Paper stained with oil
(iii) Magnet
(iv) Glass spectacles
Help Boojho in finding out the material(s) which is/are opaque.

Which of the following materials is not lustrous?

Pick one material from the following which is completely soluble in water.

An iron nail is kept in each of the following liquids. In which case would it lose its shine and appear dull?