37. How can decantation method be useful to everyday life?
A. It helps us to make our everyday living more efficient and easier.
B. It gives us satisfaction to our everyday living
C. It helps us to become more productive.
D. It just an ordinary technique.
38. Which of the following best describes a magnet when used to separate
mixtures?
A. It can separate metals from nonmetals.
B. It can separate nonmetals objects.
C. It can separate larger particles.
D. It can separate smaller particles.
39. Mr. Froiler is a miner. He wants to separate gold from a mixture of sand,
mud and gravel. Which process will he use to separate gold from the mixture?
A. by sieving
C. by picking
B. by decanting
D. by winnowing
are easily attracted to the
40. Metals which are made up of_______ are easily attached to the magnet.
A. alloy, nickel or cobalt
B. paint, water or powder
C. salt, rubber or plastic
D. gold, ruby, diamond
41. What would you do to the mixtures of eggshell and paper to make it useful?
A. Throw them in the river.
B. Make a compost.
C. Mix them with the non-decaying materials.
D. Keep them in the yard and let them decay
42. Read and understand: "At the end of every day, we wipe off the blackboard with
wet sponge to make it clean and ready to use for the next day. After a few
minutes, the water disappeared. Where do you think the water goes? Why?
A. The water disappeared because of the hot temperature.
B. The water disappeared because of evaporation.
C. The water disappeared because it is the way it used to be
D. Never mind of the water​