Waves - Echoes

Question 1

what can be made to reflect

Answer 1

sound and ultrasound

Question 2

when waves are made to reflect what happens

Answer 2

when this happens the angle of incidence is always equal to the angle of reflection

Question 3

what does audible sound range from

Answer 3

20hz to 20,000hz

Question 4

can sound above 20,000hz be heard by humans

Answer 4

no

Question 5

what can hear sound above 20,000hz

Answer 5

bats, dogs , dolphins and many other animals

Question 6

what is reflected sound and ultrasound called

Answer 6

its called an echo

Question 7

what five ways can humans use ultrasound echoes

Answer 7

-scanning metal casings for faults and cracks
- scanning a women’s womb to check on the development of a baby
- scanning soft tissues to diagnose cancer
- fish locations by seagoing trawlers
- mapping the surface of the ocean floor in oceanography