Test on Common Physical Separation Methods

Question 1: Filtering is a method commonly used to purify liquids.

A. Ano

B. Ne

Explanation: The study materials state that filtering is a method commonly used in laboratories to purify liquids or gases.

Question 2: Is settling a method where the liquid is poured off the top of the mixture while solid particles remain at the bottom?

A. Ano

B. Ne

Explanation: Settling is a method of separating solid particles from a liquid by allowing the mixture to stand undisturbed for a period of time. The solid particles settle to the bottom while the liquid remains on top. Pouring the liquid off the top is described as decanting.

Question 3: Which physical separation method would be best suited for separating pebbles from sand?

A. Filtering

B. Sieving

C. Decanting

D. Hand sorting

Explanation: The study materials explain that sieving is a method of separating particles based on their size. It specifically identifies 'Separating pebbles from sand' as an activity where sieving would be the best separation method.

Question 4: According to the study materials, which of the following statements accurately describes the filtering method for separating solid particles from a liquid?

A. Solid particles settle at the bottom while the liquid is poured off.

B. The mixture is passed through a mesh screen, trapping larger particles.

C. Solid particles are trapped in a filter while the liquid passes through, commonly used to purify liquids.

D. Materials are manually picked out one by one from small mixtures.

Explanation: The study materials describe filtering as a method where "solid particles are trapped in the filter while the liquid or gas passes through" and note that "This method is commonly used in laboratories to purify liquids or gases." Option 2 aligns directly with this description for separating solid particles from a liquid. Options 0 describes decanting, option 1 describes sieving, and option 3 describes hand sorting.

Question 5: Is separating rice grains from broken rice accomplished through hand sorting?

A. Ano

B. Ne

Explanation: The study materials state that separating rice grains from broken rice is achieved by sieving.