Activity 2: Choose the letter of the best answer. Write the letter of your answer in the blank.
_____1. What energy is formed by making vibrations?
A. heat energy B. light energy C. sound energy D. electrical energy
_____2. Which of the following produces sound energy?
A. ironing clothes B. burning a candle C. beating the drum D. lighting the burner
_____3. Which of the following statements best described how sound energy is produced?
A. It is produced by making vibrations. B. It is produced from muscles, wind, and machines.
C. It is produced from sunlight, magnets, and dry cell. D. It is produced using electricity, generators, and batteries
_____4. An ultrasound produces echo which is an example of sound energy. Why is ultrasound used by hospitals and lying-in clinics?
A. To prevent premature delivery of the baby B. To give warmth to the baby inside a mother’s womb
C. To show the developing baby inside a mother’s womb D. To change the baby’s position inside a mother’s womb
_____5. Why is sound energy important to all living things?
A. It makes work easier. B. It enables us to do work.
C. It can make communication easy. D. It enables us to understand what is going on around us.
_____6. Which of the following is the other word for heat?
A. electrical B. mechanical C. sound D. thermal
_____7. Which situation will show heat transfer by radiation?
A. boiling of water B. ironing of clothes C. roasting chicken D. sunbathing during summer
_____8. Heat energy released to the environment may __________.
A. still be recovered B. spread out indefinitely
C. cause increase in temperature D. result in the lowering of air temperature
_____9. Heat energy has many uses. Which of the following is NOT a use of heat energy?
A. Heat energy is used to warm the surroundings. B. Heat energy is used to generate electricity.
C. Heat energy is used for communication. D. Heat energy is used for cooking.
____10. Why is it better to use a wooden handle for a cooking utensil?
A. Heat is produced in a wooden handle. B. Heat cannot transfer in a wooden handle.
C. Heat is produced easily in a wooden handle. D. Heat can transfer easily in a wooden handle.
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