Question 1

Which of the following is an example of an object made from metals?

Accepted Answer

Metals are materials that typically possess properties like hardness, luster, and strength. Among the given options, keys are made of metal (like iron or brass), whereas a wooden chair is made of wood, a plastic bucket is made of plastic, and a cloth shirt is made of fabric. Therefore, keys are the

Question 2

Which of the following materials is soluble in water?

Accepted Answer

Soluble substances are those that completely disappear or dissolve in water to form a solution. Common salt (sodium chloride) dissolves completely in water, whereas sand, chalk powder, and sawdust do not dissolve and either settle down or float, making them insoluble.

Question 3

Which of the following objects is opaque?

Accepted Answer

Opaque objects are those through which we cannot see at all, as they do not allow light to pass through them. A wooden board is opaque, whereas clear glass is transparent, and oiled paper is translucent, allowing some light to pass through.

Question 4

Which of the following materials floats on water?

Accepted Answer

Materials that are less dense than water tend to float on it. Dry wooden logs, leaves, and plastics often float, while stone, iron nail, and glass marble are denser than water and sink to the bottom. Out of the given choices, dry leaf floats.

Question 5

Materials that have a special shine on them are generally called:

Accepted Answer

Materials such as metals often possess a characteristic shine called luster. Objects with luster are referred to as lustrous materials. Examples include gold, silver, copper, and iron. Non-metals usually lack this property.

Sorting Materials into Groups