17. Which of the following solids will dissolve completely when mix with
water?
A sand
B. stone C. soy beans D. sugar
18. What is formed when two or more materials are combined?
A. compound B. mixture C. substance
D. salad
19. What do you call a mixture that is the same all throughout?
A. compound
C. homogeneous
B. heterogeneous
D. substance
20. What happens when you stop pulling the rubber band?
A. It stays long.
B. It gets even longer
C. It changes its color.
D. It goes back to its original shape.
21. What harmful effect can fireworks do to the environment?
A. It may cause air pollution. C. It may cause land pollution
B. It may cause deforestation. D. It may cause water pollution.
22. What would happen if farmlands will be turned to subdivisions?
A. No more space to farm.
C. People will become rich.
B. No enough supply of farm products. D. Both A and C.
23. What do you think will happen to the melted ice cream when we put it
back to the freezer?
A. It changes flavor
C. It will evaporate.
B. It solidifies again
D. It continues melting.