sorting materials into groups

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

• mustard oil

• soft drink

• coconut oil

• kerosene

Tags

NGSS.MS-PS1-2

pick one material from the following which is completely soluble in water

• chalk powder

• tea leaves

• glucose

• saw dust

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?

• i and ii

• i and iii

• i and iv

• iii and iv

Tags

NGSS.MS-PS4-2

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 materials that are opaque.

• i only

• iv only

• i and iii

• ii and iv

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?

• glass tumbler

• mirror

• muslin cloth

• aluminium foil

Tags

NGSS.MS-PS4-2

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

• cotton thread and thermocol

• feather and plastic ball

• pin and oil drops

• rubber band and coin

Which among the following are commonly used for making safety pins?

• wood and glass

• plastic and glass

• leather and plastic

• steel and plastic

Which of the following materials are non lustrous?

• gold

• silver

• diamond

• wood

Which of the following statements is not true?

• materials are grouped for convenience

• materials are grouped to study their properties

• materials are grouped for fun

• materials are grouped according to their uses

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

• transparent

• translucent

• opaque

• all the above