22. Mixture is important because
A. It is used in many processes for example, mixing ingredients to our food when we cook. B. Even the air we breathe is an example of mixture.
C. It helps us make new things. D. All of the above
23. Which of the following mixture is an example of homogeneous?
A. flour and baby powder
B. paperclips and pins
C. milkshake and sago
D. pebbles and water _
24. Which of the following is true about heating? A. Materials remain as is when they are heated. B. Heating does not do anything to matters.
C. Materials expand when they are heated.
D. Freezing water is a process of heating.
25. Which of the following changes of properties of matter does NOT make it return to its original form?
A. Melting sugar in a glass of water.
B. Freezing water into ice cube
C. Melting chocolate bar.
D. Melting crayons.
26. Naomi left a glass of water on the sidewalk on a summer morning. When she came back in the afternoon, there was less water in the glass, and the sidewalk around the glass was dry. What most likely happened to the water?
A. It froze and a dog ate it.
B. It evaporated due to the sunlight.
C. There is not enough information to tell
D. It leaked out of the glass onto the sidewalk.
27. Differentiate homogeneous and heterogeneous mixture.
A. Homogeneous has uniform appearance throughout while heterogeneous consists of visibly different substances or phases.
B. Heterogeneous has one uniform appearance throughout while homogeneous consists of visibly different substances or phases.
C. Both choices a and b are correct.
D. None of the above.
28. Which of the following happens when something changes from a solid to a liquid?
A. condensation
B. evaporation
C. freezing
D. melting
29Which would represent mixture?
A. carbon dioxide B. oxygen C. water D. air one
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Answer:
22. D
23. C
24.C
25. A
26. B
27. A
28. D
Explanation:
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