_____15. How can you separate the mixture of sand and iron? A. by decanting C. by sieving B. by magnets D. by handpicking _____16. Some of the substances are easily separated just by taking out the impurities with our hand. Which of the following mixtures can be separated through the use of our hands? A. salt solution C. oil and water B. mixed sliced fruits D. muddy water _____17. Which of the following statements describes floatation as a process of separating mixtures? A. It is used to separate substances by whether they float or sink. B. It heats the mixture until it evaporates. C. Liquid are slowly poured without disturbing the solid particles D. Mixtures are place in a centrifuge to separate its component. _____18. How to separate liquids that have significantly different boiling points? A. evaporation C. filtration B. decantation D. distillation _____19. Which of the following mixtures can be separated using simple distillation? A. mixture of sand and pebbles B. mixture of alcohol and water C. mixture of small and big marbles D. mixture of sugar and salt


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