ultrasound

Question 1

can we hear every pitch made of sound

Answer 1

no

Question 2

is it high or low frequencies that are difficult to hear

Answer 2

high

Question 3

what is the range of human hearing

Answer 3

20-20,000hz

Question 4

what is the symbol for hertz

Answer 4

Hz

Question 5

what are ultra sounds

Answer 5

the sounds that we do not hear with a frequency higher than 2000hz

Question 6

write down three animals that use ultrasound

Answer 6

bats
dolphins
and whales

Question 7

how do bats use ultra sound and how does it work

Answer 7

use it for night hunting or detecting caves at night,
it works by bat sending ultra sound and detecting the reflect of the ultra sound

Question 8

complete this

1 -all sounds travel at a set speed in the air——
2- if the sound wave enters a different substance for example water ——-

Answer 8

1-340m/s

2- the speed would change

Question 9

how is ultra sound used a lot In medicine

Answer 9

by timing how long it takes for the sound to travel through are body it allows us to form a picture of inside are body without opening it up