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WorksheetsOcean Sound and Light
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
organisms internal temperature changes with seawater temperature
a)
Ectotherm
b)
Endrotherm
c)
Homeotherm
d)
Warm-blooded
2.
organisms have an internal temperature that varies about 48.2oF - 60.8oF
a)
Endotherm
b)
Ectotherm
c)
Homeotherm
3.
have an internal temperature that is relatively stable
a)
Endotherm
b)
Ectotherm
c)
Cold-Blooded
d)
Homeotherm
4.
zone of minimum sound speed in the oceans
a)
SOFAR
b)
halocline
c)
pynocline .
d)
refraction zone
5.
How is density affected by temperature and salinity?
a)
as temperature decreases, salinity will increase
b)
as temperature increases, salinity will increase
c)
as temperature decreases, salinity will decrease
d)
as temperature increases, salinity will decrease
6.
What instrument can be used to measure salinity?
a)
hydrometer
b)
bathyscaph
c)
manometer
d)
barometer
7.
Sound travels ______ times faster in water than in air.
a)
four
b)
five
c)
six
d)
seven
8.
In which of the following organisms does the chemical reaction “luciferin + luciferase → bioluminescence” not take place?
a)
deep-sea fish
b)
phytoplankton
c)
dolphins
d)
bacteria
9.
The ocean usually looks blue because
a)
the sky is blue.
b)
blue light has a low frequency
c)
blue light is reflected from the water
d)
blue light is absorbed near the surface
10.
The position of an object underwater looks different than its true position due to the behavior of light called
a)
absorption
b)
radiation
c)
refraction
d)
reflection
11.
The structure used by dolphins for echolocation is the
a)
melon
b)
external ear
c)
swim bladder
d)
lateral line
12.
All the following affect the speed of sound underwater except
a)
salinity
b)
pressure
c)
light
d)
temperature
13.
The salinity of ocean water is about
a)
35 parts per thousand
b)
3.5 parts per thousand
c)
0.35 percent
d)
35 percent
14.
Water transparency is generally greatest in the ______ wavelengths of visible light.
a)
blue
b)
red
c)
yellow
d)
orange
15.
This makes up most of ocean…light does not reach down here-very few living organisms
a)
Aphotic
b)
Photic
c)
Twilight
d)
Euphotic
16.
Water absorbs colors at the ______ end of the spectrum more easily than that the ________ end.
a)
red, blue
b)
blue, orange
c)
green, yellow
d)
red, green
17.
The transmission of sound by water can best be described by which of the following statement:
a)
It is more efficient than transmission by air
b)
Sound does not travel in water - a property known as incompressibility
c)
It is the same as by air.
d)
It is inefficient as compared with transmission by air.
18.
The ocean is slow to heat and slow to cool. This is related to a property of water known as
a)
boiling point.
b)
residence time.
c)
density.
d)
heat capacity.
19.
A zone in which the ocean's salinity increases rapidly with increasing depth is called
a)
a salticline.
b)
thermocline.
c)
a pycnocline.
d)
a halocline
20.
The ocean's deep sound channel (sofar layer) is characterized as a zone in which
a)
sound is horizontally concentrated rather than diffused as it moves through the water
b)
acoustical energy losses are relatively large.
c)
sound velocity is at a maximum.
d)
light waves travel great horizontal distances.
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