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Ch 7, Lessons 4-6, 6th Grade
Test Description: Water
Instructions: Answer all questions to get your test result.
1) Ocean water has a ____ freezing point than fresh water.
A
lower
B
the same
C
higher
2) The three temperature zones, from warmest to coldest, are
A
surface zone, transition zone, deep zone
B
surface zone, deep zone, transition zone
C
deep zone, transition zone, surface zone
D
transition zone, deep zone, surface zone
3) Sonar uses ___ to calculate the distance to an object.
A
sound waves
B
electromagnetic waves
C
submersibles
D
light
4) A broad area covered with thick layers of mud and silt
A
continental slope
B
abyssal plain
C
continental shelf
D
seamount
5) Stronger winds create
A
slower waves
B
smaller waves
C
no waves
D
larger waves
6) The lowest part of a wave is the
A
trough
B
wavelength
C
frequency
D
crest
7) In the open ocean, most waves are between
A
20 meters high
B
2-5 meters high
C
1-2 meters high
D
7-10 meters high
8) When waves pass, the particles
A
pile up on the bottom
B
do nothing
C
move in circles
D
get pushed towards shore
9) What causes waves to slow down as they reach shore?
A
winds slowing down
B
the sand makes the water denser
C
friction between the ocean floor and the water
D
the water's attraction to itself
10) There are warning systems for tsunamis.
A
true
B
false
11) THe movement of water and sand along a beach is called
A
rip current
B
undertow
C
barrier beaches
D
longshore drift
12) Where do rip currents form?
A
in rocky areas below the surface
B
all of the above
C
where water breaks through sandbars
D
deep in the ocean trenches
13) A wall of rocks or concrete that go outward from the beach
A
longshore drift
B
groin
C
sand dunes
D
barrier beach
14) Deep currents are caused by
A
all of the above
B
differences in the density of ocean water
C
earthquakes
D
wind
15) When surface waters in the eastern Pacific are colder than normal, a climate event called ___ occurs.
A
La Nina
B
El Nino
C
riptides
D
Gulf Stream
16) Warm ocean currents often bring ___ to the land.
A
warm, moist air
B
warm, dry air
C
cold, moist air
D
cold, dry air
17) In the Northern Hemisphere, the Coriolis effect causes the currents to curve
A
straight down
B
many different directions
C
counterclockwise
D
clockwise
18) Surface currents are driven mainly by
A
temperature differences
B
differences in density
C
winds
D
earthquakes
19) Salt is frozen in ice along with water.
A
false
B
true
20) Which is more dense: cold water or warm water?
A
cold water
B
warm water
C
it depends on the salinity
D
they are equal
*select an answer for all questions
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