WorksheetsMB Midterm Ocean Dynamics and Ecosystems
Total questions: 35
Worksheet time: 22mins
In a water molecule, the hydrogen atoms are slightly
positive
negative
Water has a high heat capacity. What does this mean?
It means that, with the addition of heat energy, water will boil once it reaches a temperature of 100°C
It means that water will freeze, changing phase from a liquid to a solid, upon reaching a temperature of 0°C.
It means that water is able to absorb a significant amount of heat without a drastic increase in temperature
It means that water will rapidly increase in temperature with the addition of heat energy
The ability of water molecules to "stick” together is known as
cohesion
adhesion
capillary action
while the ability of water to "stick" to everything else is known as
cohesion
adhesion
Why does ice float?
water expands when it freezes, making ice less dense than water
water compacts when it freezes, making ice more dense than water
hydrogen bonds in water push the ice to the surface
ice is afraid of water, and avoids it
What are the bonds called between a slightly positive hydrogen in a polar molecule and a negatively charged atom?
Hydrogen Bonds
Water Bonds
Covalent Bonds
Bail Bonds
A(n) ______ is a substance with a pH less than 7
acid
base
neutral
Why do currents curve to the right in the Northern Hemisphere?
riptides
density
salinity
Coriolis effect
What causes deep currents?
differences in density
weather
wind
Coriolis effect
What causes surface currents?
wind
temperature
salinity
density
How will the melting of icecaps change the salinity of ocean water?
raise the salinity
lower the salinity
no change to the salinity
I have no idea
How could an understanding of surface currents help early explorers and traders?
it helped them find quicker sailing routes
it kept their boat from sinking
it helped them find passengers
it kept them rich
Warm ocean currents generally come from
The North Pole
The Equator
The South Pole
________ and _______ affect the ocean's density and cause the Global Conveyor Belt to travel
gravity and the Coriolis Effect
temperature and salinity
wind and climate
temperature and the Coriolis Effect
Which type of tides happen twice every day in most places?
High/Low
Spring
Neap
Which type of tides have a larger tidal range due to the Earth, Moon, and Sun forming a line?
High/Low
Spring
Neap
Which type of tides have a smaller change in sea level due to the Earth, Moon, and Sun forming a right angle?
High/Low
Spring
Neap
The distance between one crest and the next (or one trough and the next) is known as the ______________.
Amplitude
Wave Height
Wavelength
The highest point of the wave is called the
amplitude
crest
trough
period
A bar of sand or shingle joining an island to the mainland.
tombolo
bar
spit
wave-cut platform
All phytoplankton are ...
autotrophic
heterotrophic
meroplankton
macroplankton
phtyoplankton are considered to be the base of the food chain in the ocean
true
false
What is the name of some of the very first Algae on our planet?
Blue Algae
Green Algae
Cyanobacteria
Protozoa
How long ago did these Cyanobacteria first show up?
1 million years ago
4 million years ago
3.5 billion years ago
last week
2 types of cells on our planet are...
Protists
Prokaryotes
Dinoflagellates
Eukaryotes
What would happen to the bird if the green fish died out?
the bird population would grow
the bird population would die out
the smaller fish will die out
