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WorksheetsProperties of Water and Seawater
Total questions: 30
Worksheet time: 15mins
What percent of the earth's water is salty?
97%
3%
70%
30%
What percent of the earth is covered in water?
97%
3%
70%
30%
What percent of the earths water is fresh?
97%
3%
70%
30%
Where is most of the earth's freshwater?
lakes
rivers
groundwater
glaciers
The water cycle is important because...
...it adds water to the earth by melting glaciers
...it recycles the world's water
...it makes the ocean salty
...it brings water to the moon
The chemical formula of water?
02H
HO2
H20
OH2
Water has a positive and a negative end, this makes it...
...a non-polar molecule
...a polar molecule
...a magnet
...a conductor of electricity
Water dissolves the most substances, making it the...
...the universal solute
...the universal solution
...the universal solvent
...the universal salty water
Water on earth exists as...
only liquid
only liquid and solid
only solid and gas
a liquid, solid and gas
Water has a high specific heat, which means...
...it takes a long time to heat up and a long time to cool down
...it takes a short time to heat up and to short time cool down
...it takes a long time to heat up and short time to cool down
...it takes a short time to heat up and a long time to cool down
The property of water that keeps coastal climates cool in the summer and warm in the winter is...
it's boiling point
it's freezing point
it's high heat capacity
it's low heat capacity
The pH of pure water is...
acidic
neutral
basic
Pure water's density is 1.0g/cm3, when it freezes the density of water...
goes up
goes down
stays the same
Adding salt to water...
increases the density
decreases the density
does nothing to the density
makes the water less salty
Water's ability to form droplets is due to the property of...
adhesion
cohesion
freezing
surface tension
Water's ability to stick to surfaces is due to the property of...
adhesion
cohesion
freezing
surface tension
Water with low salinity is called...
brackish
hypersaline
hyposaline
bracksaline
Water with high salinity is called...
brackish
hypersaline
hyposaline
bracksaline
The average salinity of the worlds oceans is...
35 parts per thousand
35 percent
97 parts per thousand
97 percent
The highest ocean salinities on earth are...
close to the Equator
close to the poles
close to the North pole
none, the salinity is equal all over the earth
How does temperature affect the salinity of water?
as temperature goes up, salinity goes down
as temperature goes up, salinity goes up
as temperature goes down, salinity goes up
as temperature goes up, salinity stays the same
As precipitation and river run-off flow into the ocean, what happens to salinity?
salinity goes down
salinity goes up
salinity stays the same
How does pressure affect the salinity of water at the poles?
as pressure goes up, salinity goes down
as pressure goes up, salinity goes up
as pressure goes up, salinity stays the same
How does pressure affect the salinity of water at the Equator?
as pressure goes up, salinity goes down
as pressure goes up, salinity goes up
as pressure goes up, salinity stays the same
Why is the ocean salty?
There's more salt in it
Salt water from rivers and streams carry it there
Rivers & streams carry salty minerals from inland to the ocean
The ocean animals deposit salt there
The ocean is salty because
ocean water evaporates
rocks on Earth's surface weather and erode
rivers carry minerals to the ocean and deposit them
all of these
What is the chemical form form of salt?
NaCl
sugar
The average pH level of oceans is...
7.0
8.2
6.5
4.5
Salt water is a ___________ conductor of electricity.
good
poor
The density of seawater is....
higher than pure water
lower than pure water
the same as pure water
