ANSWERS TO CONCEPT CHECKS
1. The simplest methods involved lowering a weight on a line. The length of line is
measured, and the depth determined. Sometimes the weight was tipped with wax to
retrieve a sample of bottom sediment. Scientists now use bea
CH 11 ANSWERS TO CONCEPT CHECKS
1. Tide waves are called forced waves because they are never free of the forces that
cause them. In contrast, after they are formed, wind waves, seiches, and tsunami are
free waves - they are no longer being acted upon by t
CH 14 ANSWERS TO CONCEPT CHECKS
1. Planktonic organisms can swim, but they cant make significant headway against
the currents in which they drift.
2. Plankton is an artificial category; a category not based on a phylogenetic
(evolutionary) relationship bu
CH 12 ANSWERS TO CONCEPT CHECKS
1. The place where ocean meets land is usually called the shore. Coast refers to the
larger zone affected by the processes that occur at this boundary.
2. Sea level depends on the amount of water in the world ocean, the vol
CH 15 ANSWERS TO CONCEPT CHECKS
1. Animals are active multicellular organisms incapable of synthesizing their own food.
2. During the oxygen revolution photosynthetic autotrophs changed the composition of
the atmosphere from less than 1% free oxygen to it
- The global pattern of deep circulation resembles a vast "conveyor belt" that carries surface water to the depths and back
- Water flows in how many great surface circuits?
- A wide, shallow, slow current is typ
CH 1 ANSWERS TO CONCEPT CHECKS
1. There are few dependable natural oceanic divisions, only one great mass of water.
The Pacific and Atlantic Oceans, the Mediterranean and other seas, so named for our
convenience, are in reality only temporary features of
- On a map of geological activity, you can draw the outline of plates of lithosphere by
a. connecting the earthquake epicenters.
b. outlining the continents and ocean basins .
c. outlining the mid-ocean ridges.
d. connecting the transform faults.
CH 2 ANSWERS TO CONCEPT CHECKS
1. Any coastal culture skilled at raft building or small boat navigation would have
economic and nutritional advantages over less skilled competitors. From the earliest
period of human history, understanding and appreciating
CH 6 ANSWERS TO CONCEPT CHECKS
1. Atoms cannot be broken into simpler substances by chemical means. A molecule
is a group of atoms held together by chemical bonds.
2. Molecules are held together by chemical bonds. Chemical bonds, the energy
- Which is not a characteristic of an arthropod?
Articulation of appendages
- Cetaceans are comprised of Manatees, dolphins, seals, and sea otters
- What class is comprised of nautiluses, octopu
ANSWERS TO CONCEPT CHECKS
1. Wegener believed that the heavy continents were slung toward the equator on the
spinning Earth by a centrifugal effect. He was wrong in that belief, but correct in
sensing that continents were moving.
2. Where were the tracks
CH 5 ANSWERS TO CONCEPT CHECKS
1. Sediment is particles of organic or inorganic matter that accumulate in a loose,
2. The marine processes that generate sediments are widespread. Sediment particles
may consist of the remains of once-l
- Why does oil seep to the surface from its source rock?
Oil is less dense than surrounding sediments
None of the choices
- The motion of the waves can be used to generate energy.
- What marine resource
CH 13 ANSWERS TO CONCEPT CHECKS
1. A shark and a seaweed are certainly superficially dissimilar, but the physical and
biochemical organization of the cells that comprise both is startling in its
similarity. On the molecular level, there are few difference
- Physical oceanographers:
Study and observe wave dynamics, currents, and ocean-atmosphere interaction.
Are concerned with the composition of the inner Earth, the mobility of the crust, the characteristics of seafloor sediments,
and the history of E
CH18 ANSWERS TO CONCEPT CHECKS
1. Marine pollution is the introduction into the ocean by humans of substances or energy
that changes the quality of the water or affects the physical, chemical, or biological
environment. The most dangerous pollutants combi
- The photosynthetic activity of marine plants and phytoplankton cause:
a. Oxygen to be abundant at the surface
b. Carbon dioxide to be abundant at the surface
c. Oxygen to be low near the surface
d. Carbon dioxide to be low near the surface
e. Both A and
CH 10 ANSWERS TO CONCEPT CHECKS
1. You can point to a wave crest and follow its progress, but only energy is moving
long distances in ocean waves, not water mass. The water mass moves in closed
circles (Figure 10.3) while energy can move for long distance
- What is plankton?
Any photosynthetic organism
An internal organism
A drifting organism
An actively swimming organism
- Nearshore productivity is almost always more productive than open ocean productivity.
- When high or low tidal currents begin to change direction, it is called:
- The tidal cycle is 24 hrs 50 minutes long because the moon rises 50 minutes later each day.
- A wave of wa
CH 17 ANSWERS TO CONCEPT CHECKS
1. In the twentieth century, population growth mainly in developing countries was
been coupled with a 4.5-fold increase in economic activity per person. The use of
Earths resources has not been proportional to the growth in
- The time it takes for a wave to move a distance of one wavelength is known as
- The factors necessary to make a really large wind wave are _, _, and
wind strength, wind duratio
- A pattern of wind circulation that changes with the season. The areas that experience these patterns are subject to wet summers and
b. Sea breeze
c. Land breeze
- What was the United States most costly natural disaste
- The key to determining longitude at sea was by inventing a sturdy clock that ran at a constant rate under any circumstance. The first
of these clocks was governed by a spring escarpment and not by pendulum and
a. Was invented by John Harrison
b. Was inv
- A stenothermal organism might be best adapted for which condition?
760-762 mm Hg
- A stable, long-established community is known as a climax community
- Which is NOT a characteristic of deep water animals?
CH 16 ANSWERS TO CONCEPT CHECKS
1. A community is comprised of the many populations of organisms that interact at a
2. A population is a group of organisms of the same species occupying a specific area.
3. The largest marine community
CH 8 ANSWERS TO CONCEPT CHECKS
1. The troposphere.
2. Weather is the state of the atmosphere at a specific time and place, while climate
is the long-term average of weather in an area.
3. The lower atmosphere is a mixture of gases, mostly nitrogen (78.1%)
- The minimum velocity layer.
a. Has come to be known as the sofar layer
b. Is where sound travels slowly
c. Is called the Refractive index
d. Both A and B are correct
e. Both B and C are correct
- Heat is stored in the ocean during the day and released a
CH 7 ANSWERS TO CONCEPT CHECKS
1. Short: Rainwater falls on the sidewalk, flows into a drain that leads to the ocean
where it evaporates when the sun comes out. Long: Rainwater falls on the
sidewalk, flows into a drain that leads to the ocean where it mix