Science Quiz ch- Sorting of Material into the group

Both Sarika and Mohan were asked to make salt solution. Sarika was given a teaspoonful of salt and half a glass of water, whereas Mohan was given twenty teaspoons full of salt and half a glass of water. How would they make salt solutions? Who would be able to prepare saturated solution?

Why tumbler is not made with a piece of cloth?

Write any three properties of metals.

Write difference between Opaque, transparent and translucent materials. Give examples also

Materials can be sorted into groups based on their properties. Properties of materials are used to identify and classify them.

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R is not the correct explanation of A.

• A is true but R is false.

• A is false but R is true.

Mixtures need to be separated because

• to obtain highly pure substances

• To get desirable substances

• To remove undesirable substances

• All of these

Materials that cannot be compressed easily are called______ materials.

• Soft.

• Rough

• Scaly

• Hard

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

• (a) Mustard oil

• (b) Soft drink

• (c) Coconut oil

• (d) Kerosene

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?

• (a) (i) and (ii)

• (b) (i) and (iii)

• (c) (i) and (iv)

• (d) (iii) and (iv)

Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants?