Direction: Write the letter of your answer on the space provided before each number.
6. This is a device that emits a great deal of light in a very narrow beam of radiation.
A. Optical fiber.
B. Laser.
C. Ordinary flashlight.
D. Cellphone.
7. What will happen when you block the light with a cardboard?
A. The light will disappear.
B. The light will bounce into space.
C. The light can pass through the cardboard.
D. The light cannot pass through the cardboard.
8. Which of the following statements is correct about sound?
A. Sound cannot travel through solid.
B. Sound travel faster in solids than in air.
C. Sound travel faster in liquids than in solid.
D. Sound travel faster in air than in liquids.
9. Which of the following materials are made to produce sound?
A. door bell.
B. electric fan.
C. flat iron.
D. wrist watch.
10. Where does sound travel the fastest?
A. on air.
B. on water.
C. on gas.
D. on wood.
[ No pic is needed btw, correct answer is brainliest while the nonsense answer is reported ]
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