Grade 3 Science Quiz: Separating Mixtures

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

• Combining

• Separating Mixtures

• Dissolving

• Mixing

Which method involves picking out unwanted substances by hand?

• Filtration

• Sedimentation

• Decantation

• Handpicking

What method is used to separate substances of different sizes?

• Filtration

• Decantation

• Handpicking

• Sieving

Which method is commonly used to remove solid particles from a liquid?

• Handpicking

• Sieving

• Filtration

• Sedimentation

What happens during sedimentation?

• Liquid evaporates

• All components mix together

• Heavier impurities settle at the bottom

• Solid particles float on top

What is decantation?

• Separating by hand

• Filtering solid from liquid

• Transferring clear liquid without disturbing sediments

• Mixing liquids together

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

• Handpicking

• Filtration

• Sieving

• Dissolving

What is the main goal of separating mixtures?

• To create new mixtures

• To extract useful components

• To make everything the same

• To dissolve all substances

Which method would you use to separate sand from water?

• Sieving

• Filtration

• Handpicking

• Sedimentation

What is the first step in handpicking?

• Picking out unwanted substances

• Pouring the mixture

• Using a sieve

• Waiting for sedimentation