Why are Earth’s oceans salty?
Oceans

Quiz
•
Other Sciences
•
6th - 8th Grade
•
Hard
TIMOTHY MOSER
Used 173+ times
FREE Resource
14 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rain washed salts into them.
They contain a lot of water vapor.
Algal blooms in the ocean produced salt.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which description best characterizes the seafloor?
A. mostly flat
B. full of life-forms
C. similar to the continents
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ocean waves move water
to form tides.
long distances.
in a circular motion.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ocean surface currents are caused by
wind.
gravity.
density.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Density currents move ocean water
upward.
downward.
horizontally.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which situation describes a point-source ocean pollutant?
nitrates mixed in runoff
a nearby volcanic eruption
oil spills from several ships
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What causes coral bleaching?
slight changes in water temperature
an increase in carbon dioxide in the water
strong winds that blow for long periods of time
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