SCIENCE AND HEALTH 6: (Part 15-30)

16. Why is acid rain harmful?
a. because it can bring lots of rain
b. because it can make the surrounding hot
c. because it can contaminate water supply and corrode some materials
d. because it can bring about drought
17. What energy is associated with atomic bombs?
a. chemical energy b. kinetic energy c. light energy d. nuclear energy
18. Which of the following does NOT contribute to energy conservation?
a. Turn off the lights and electric fans as you leave your room.
b. Ride to school with your brothers and sisters in one car.
c. Close all windows as you turn on the air-conditioning unit.
d. Let the water flow as you brush your teeth.
19. Gasoline and rocket fuel store in considered as
a. electrical energy c. mechanical energy
b. chemical energy d. radiant energy
20. Which of the following statement is not true?
a. The total amount of energy remains constant.
b. Energy cannot be created but not destroyed.
c. Energy can be created but not destroyed.
d. Energy can be transformed.
21. Which of the following is true for falling object?
a. Its kinetic energy increases as it falls.
b. Its potential energy increases as it falls.
c. It does not have any energy.
d. Its kinetic energy decreases as it falls.
22. Lighting a match involves all the following energies except __________.
a. mechanical b. chemical c. radiant d. nuclear
23. The ultimate source of energy is the _____________?
a. star b. sun c. fire d. moon
24. Which of the following practices will conserve electricity?
a. Switching on appliances while sleeping.
b. Use of incandescent bulbs for illumination.
c. Turning off all appliances when not in use.
d. Ironing clothes piece-by-piece everyday.
25. A generator has an energy transformation from ___________?
a. heat energy to electrical energy
b. chemical energy to heat energy
c. chemical energy to mechanical energy
d. electrical energy to chemical energy
26. It is an electric energy generated through kinetic energy of a moving water such as that of waterfall or in a dam.
a. hydroelectric energy c. heat energy
b. tidal energy d. chemical energy
27. What is the energy change when you turn on a washing machine?
a. electrical energy to chemical energy
b. chemical energy to mechanical energy
c. chemical energy to electrical energy
d. electrical energy to mechanical energy
28. It is a substance that is made up of two or more elements combined chemically.
a. compound b. element c. complex d. molecules
29. Which of the following particles move freely around the molecules?
a. electrons b. neutrons c. protons d. none of these
30. Which of the following is an example of an element?
a. alcohol b. sodium chloride c. carbon d. kerosene