Question

(a) Define the following terms : (a) Echolocation (b) Echocardiography, and (c) 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)

(1) Echolocation is the technique by which objects are located by sensing time of echo of the sound emitted

(2) Formation of the image of the heart by reflection of ultrasound from the heart is called echocardiography.

(3) Creating images of different parts of the body by means of reflection of ultrasound is called Ultrasonography.

(b) Bats

(c) Porpoises