Separation of Substances - Grade 6 ANNUAL EXAMS

How are grain seeds removed from their stalks?

• Sieving

• Winnowing

• Threshing

• All of the above

What is a mixture?

• A chemical combination of two or more different substances.

• A physical combination of two or more different substances.

• A chemically pure substance.

• A special type of solution

Lemonade is a special mixture called a

• substance

• solution

• plasma

• ingredient

A fruit salad is a

• solution

• mixture

Which of the following is essential to perform winnowing activity?

• Wind

• Water

• Magnet

• Filter paper

While preparing chapatis, Nitya found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?

• Threshing

• Sieving

• Winnowing

• Filtration

Hand picking method is effective in

• solid mixture

• Liquid mixture

• Gaseous mixture

• None of these

The process of settling down of particles of a solid in a liquid is

• Sublimation

• Sedimentation

• Filtration

• Decantation

The process of changing solid to gas directly is ______

• Evaporation

• Condensation

• Melting

• Sublimation

Tags

NGSS.MS-PS1-4

The solubility ____________ with increase in temperature.

• doesn't change

• decreases

• increases