Question

(a) Define the following terms: (i) Echolocation (ii) Echocardiography, and (iii) Ultrasonography.
(b) Name an animal which navigates and finds food by echolocation.
(c) Which of the two produces ultrasonic waves: porpoise or whale?

Answer 1

(a) (i) Echolocation is a method used by few animals like bats, porpoises and dolphins to locate the objects by hearing the echoes of their ultrasonic squeaks.

(ii) When ultrasound waves are used to create the images of the heart of our body, the technique used is known as the echocardiography.

(iii) The technique of obtaining the pictures of internal organs of the body by using echoes of ultrasound pulses is called ultrasonography.

(b) A bat navigates and finds food by echolocation.

(c) A porpoise produces ultrasonic waves.