33. A term used for the sound that is reflected back to its source

A echo

B. mimor

C.echolocation

D. All of these options



34. The transmission of sound to locate objects

A Echolocation

B. Mirror

C Echo

D. All of these options



35. Do bats and dolphins used echolocation to locate their food and determine the direction?

A. No

B. Yes

C. Sometimes

D. Maybe



36. Which is TRUE about the characteristics of sound?

A. The loudness of sound decreases as it moves nearer the observer

B Sound could either be soft or loud

C. Sound is not heard when it is exactly on the same spot as the listener

D. The loudness of sound increases as it moves away from the observer



37. Do only animals have the ability to use echolocation?

A. True

B. False

C. Maybe

D. Sometimes



38. Which of the following is good to use to protect our ears from the noise in the environment?

A. cotton buds

B. earrings

C. ear muffs

D. all of these option



39. Which of the following is good to use when we go out on a sunny day?

A. umbrella

B. sunglasses

C. sun block

D. all of these options



40. Which of the following shows proper way of protecting oneself from the heat of the sun?

A. Wearing protective clothing like long-sleeved cloths if you are working under the sun

B. Drinking plenty of water to keep hydrated during summer.

C. Use wide-brimmed hat when working in the fields.​