Font size
WorksheetsOceans & Hydrothermal vents quiz
Total questions: 19
Worksheet time: 16mins
What percent of Earth is covered with water ?
70%
30%
97%
3%
What percent of Earth's water is fresh?
70 %
30%
3%
97%
What percent of Earth's water is salted ?
70
30
97
3
Label Earths oceans
Which Ocean is the smallest?
Atlantic
Pacific
Indian
Southern
Arctic
What term is given to riverwater when it contains salt ?
Brackish
Salinity
Salty
Fresh
What is the most abundant salt in the ocean?
sodium
sodium chloride (NaCl)
calcium chloride (CaCl2)
chlorine
Select two reasons as to why salinity can DECREASE
Evaporation because water is changing into water vapor leaving salt behind.
Freshwater is added to ocean at the mouths of large rivers as they empty freshwater into oceans.
Freshwater is added by rain, snow, and melting ice.
Surface water freezes into ice, leaving salt behind.
Select two reasons as to why salinity can INCREASE
Evaporation because water is changing into water vapor leaving salt behind.
Freshwater is added to ocean at the mouths of large rivers as they empty freshwater into oceans.
Freshwater is added by rain, snow, and melting ice.
Surface water freezes into ice, leaving salt behind.
What does the word buoyancy mean?
the ability to sink
the ability to float
density
salinity
What happens to the density of water as its salinity increases?
its density increases
its density decreases
its density remains the same, but the temperature increases
its density remains the same, but the temperature decreases
The salinity of an ocean will increase when a freshwater source flows into it.
True
False
Salinity means _________
SALTINESS or the amount of salt present in a water body
the amount of carbon di oxide in air
salt pans
3. The process of changing water vapor (gas) into tiny droplets of liquid water in the atmosphere.
a. respiration
b. condensation
c. precipitation
d. evaporation
[2:16] The process that organisms use to create energy in the deep ocean is known as (a)
[3:50] Hydrothermal vents can be found near ___
Plate Boundaries
Coastlines
Tall Mountains
Lakes and Rivers
[5:15] Hydrothermal vents form due to ___
Ice Caps Melting
Magma underneath the ocean floor
Global Warming
Heat from the bodies of dead fish
[7:56] Because organisms can perform chemosynthesis near hydrothermal vents, this means ___
there is a lot of life near hydrothermal vents
there is pretty much no life near hydrothermal vents
Organisms that can live in extreme environments are called:
hooligans
extremists
extremophiles
extremely rare
