Question

a student is asked to organize colored pencils for a class project. the student places all the red colored pencils in one bag and all the blue colored pencils in another bag. what type of physical separation process occurred? justify your answer.
explain how some coffee makers use a physical separation process when brewing coffee. give the name of the process.
a student states that the tea bag acts like filter paper when a tea bag is placed into hot water. is the student correct? justify your answer.

Explanation:

• For the first question: Hand - picking. The student separated the pencils based on color (a physical property) by manually placing red and blue pencils in different bags.
• For the second question: Filtration. Coffee makers use a filter (e.g., paper filter). The hot water passes through the coffee grounds (solid) and the filter. The liquid coffee (solution) passes through the filter while the coffee grounds (insoluble solid) are retained.
• For the third question: Yes. When a tea bag is placed in hot water, the hot water (solvent) can pass through the pores of the tea - bag (similar to filter paper) and extract the soluble components (like tea flavor compounds) from the tea leaves (solid) inside the bag. The tea leaves are retained inside the bag just as a filter paper retains the residue in a filtration process.

Answer:

• First question: Hand - picking.
• Second question: Filtration. Hot water passes through coffee grounds (solid) and filter, liquid coffee passes through, coffee grounds are retained.
• Third question: Yes. Tea - bag pores allow water (solvent) to pass and extract soluble components, retain tea leaves (like filter paper).