Science [1 Marks Each] QUE - ANS

The transparent containers are used to store materials in shops and at home because it helps us to identify the things placed in these containers from outside, without opening them as we can see through them clearly.

Hints: Do it yourself with the help of your parents
Yes, you can suggest a better sorting method. Edibles can be segregated into different groups viz., Fruits, Vegetables, Spices, Pulses, Grains, Frozen food items, etc.

Wood floats on water because it is lighter than water.

Air

Water is considered as matter because it has mass and occupies space.

Oxygen gas, dissolved in water, is important for the survival of animals and plants that live in water.

Honey, alcohol and vinegar are soluble in water. Mustard oil, kerosene and petrol are insoluble in water.

Materials, through which we are not able to see at all, are called opaque. For example, metal sheet and wooden board.

Sugar, salt and washing soda are soluble in water. Sand, sawdust and wax are insoluble in water.

The materials through which the things can be seen clearly, are called transparent. For example, glass and water.

Chalk, wax, wool and sponge are soft.

Cricket ball cannot be used to play tennis because it is heavy and has low bounce.

Steel, brass, wood and plastic can be used to make a spoon.

Steel bowl, brass lamp and bell have lustre.

Table, chair, stool and door.

(i) Frosted glass,
(ii) Butter paper/Fog.

Shyam was able to see the cricket match through glass windowpanes which were transparent.

Mustard oil is lighter than water and is also insoluble in water. So, it floats.

Opaque.

Salt has dissolved in water and is still present in water. We can find it out by tasting the water.

Sponge.

Properties of the material and the purpose for which the object is to be used must be compatible.

Wood, Plastics.