Grade 3 Science Quiz: Separating Mixtures

What is the process of separating different components of a mixture called?

• Combining

• Mixing

• Dissolving

• Separating Mixtures

Which method involves picking out unwanted substances by hand?

• Filtration

• Sieving

• Handpicking

• Decantation

What method is used to separate substances of different sizes?

• Sieving

• Handpicking

• Filtration

• Sedimentation

Which method removes solid particles from a liquid?

• Sedimentation

• Filtration

• Handpicking

• Decantation

What happens during sedimentation?

• Solid particles float

• Heavier impurities settle down

• Liquid evaporates

• All components mix together

What is decantation?

• Transferring clear liquid without disturbing sediments

• Filtering solid from liquid

• Separating by size

• Mixing liquids

Which of the following is NOT a method of separating mixtures?

• Handpicking

• Sieving

• Cooking

• Filtration

What is the main goal of separating mixtures?

• To mix everything together

• To dissolve all components

• To create new mixtures

• To extract useful components

Which method takes some time for heavier impurities to settle?

• Filtration

• Handpicking

• Sedimentation

• Decantation

What is the first step in handpicking?

• Pouring the mixture

• Picking out unwanted substances

• Filtering the mixture

• Waiting for sedimentation