16. Winnowing is used in separating_________________. *
1 point
a. both light components
b. both heavy components
c. light and heavy components
d. none of the above
17. Which of the following is not a method of separating mixture?
a. mixing
b. winnowing
c. distillation
d. decantation
18. Which one of the following substances is a mixture? *
1 point
a. copper
b. seawater
c. water
d. salt
19. If a substance dissolves in a solvent, we say that it is *
1 point
a. insoluble
b. soluble
c. universal
d. concentrated
20. Which one of the following is an example of a solution? *
1 point
a. orange squash
b. paint
c. sand particles in water
d. vinegar
21. Which one of the following is NOT an example of a separation technique? *
1 point
a. fishing net
b. boiling egg
c. combing hair
d. tea strainer
22. Which one of the following is NOT a mixture? *
1 point
a. sugar
b. paint
c. air
d. crude oil
23. A solution can be made more concentrated by adding more __________ or by removing some _________. *
1 point
a. solvent, solute
b. solute, suspension
c. suspension, solvent
d. solute, solvent
24. Which is the best way to get salt from salty water? *
1 point
a. Evaporation
b. Distillation
c. Filtration
d. Decantation
25. Which of these are methods of separating a solid from a liquid? *
a. Decanting, filtering and dissolving
b.Decanting, filtering and evaporating
c. Decanting and dissolving
d. Decanting and watering
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Answer:
16C
17B
18D
19B
20D
21B
22C
23A
24C
25B