Multiple choice

What is the method used to separate cream from milk?

  1. Filtration

  2. Centrifugation

  3. Crystallisation

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Centrifugation uses centrifugal force to separate substances of different densities. Cream (fat) is less dense than skim milk, so it rises to the top and can be separated by spinning. Filtration separates solids from liquids using a filter. Crystallisation purifies dissolved solids from a solution.

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