1 - Read and choose the letter of the correct answer. Write your answer on the line 1. In which medium can sound wave travel faster? A. solids B. liquids C. gases D. all of these 2. What affects the speed of sound as it travels? A. person receiving it C. the origin of the sound B. the nature of material D. the loudness of the sound 3. Which of the following statements about sound is correct? A. Sound cannot travel through a solid. B. Sound travels faster in air than in liquids. C. Sound travels faster in solids than in air. 4. When objects move back and forth then produce sound, the movement is called A. dullness B. steadiness C. vibration D. stillness 5. Which of the statements below is incorrect on how sound travels? A. Sound travels through air. B. Sound travels through water. C. Sound travels through solid materials D. Sound travels faster in liquids and gases. 6. What happens to a liquid when heated? A. It remains the same. C. It increases in temperature. B. It increases in volume. D. It increases its water level. 7. Which of the following heat transfers is done in convection? A. Heat transfer through from substance to another by direct contact. B. When liquid or gas is heated, the molecules of the heated part move faster and away from each other. C. Heat can be transmitted across empty space. D. Heat was received by the sun. 8. In what way heat gives bad effects to us? A. It can cook our food. C. It can burn our skin. B. It can dry our clothes. D. It can be used for medical purposes.
