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WorksheetsWhat We Can't Hear (2018)
Total questions: 10
Worksheet time: 6mins
What is the lowest frequency that humans are able to hear?
20 Hz
0 Hz
20,000 Hz
2,000 Hz
200 Hz
What is the highest frequency that humans are able to hear?
20 Hz
0 Hz
20,000 Hz
2,000 Hz
200 Hz
Vibrations with frequencies above the human range of hearing are called __________________.
infrasound
ultrasound
SONAR
echos
Vibrations with frequencies below the human range of hearing are called __________________.
infrasound
ultrasound
SONAR
echos
What is SONAR used for?
mapping the ocean floor and detecting objects in the ocean
some animals use it to find food in the dark
communication between sea mammals
finding missiles in the sky
Which of these animals use(s) echolocation as discussed in class? Choose all that apply.
bats
dolphins
elephants
cats
owls
When sound bounces off of an object, we call it _____________.
SONAR
an echo
a reflection
infrasound
ultrasound
Which type of vibrations have the HIGHEST amount of energy?
infrasound
sound
ultrasound
They all have the same
amount of energy.
Sound travels in ____________ waves.
compression
transverse
hand
seismic
Sound travels in ______________.
all directions
a single direction (a straight path)
two directions at once
unpredictable directions
