UNIT 7: MIXING THINGS
Objective questions
Choose the correct answers.
1 Which of these materials dissolves in water?
A Sugar B Nuts C Beads
2 When a solution dissolves in water, it…
A can be filtered out
B sinks to the bottom of the container
C disappears
3 Johan adds some green beans into a container filled with water. He notices the green beans do not disappear in water. What does this mean?
A Green beans dissolve in water
B Green beans do not dissolve in water
C Green beans are hard material
5 A little coffee powder is added into a glass of water and stirred. How does the water taste now?
A Sweet B Bitter C Tasteless
6 Anis wants to make a solution. Which of these materials should she add to a glass of water to make a solution?
A Milk powder
B Pepper seeds
C Cinnamon sticks
7 A student puts two different materials into a beaker of water and mixes it. After a while, he notices that only one material dissolves in water. How can he separate the material that cannot dissolve in water from the mixture?
A By putting the mixture in the refrigerator
B By tasting the mixture
C By filtering the mixture
8 Zainal adds an unknown material into a glass of water and stirs it. After a while, the material disappears. When he tastes the solution, it is salty. What could the unknown material be?
A Salt
B Curry powder
C Coffee powder
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