ashworth-sc260-exam-1

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Online Exam 1_01

Part 1 of 1 – 90.0/
100.0 Points

Question 1 of 20

The general relationship between available light and leaf
area index (LAI) is described by:

A. Bohr’s law.

B. Beer’s law.

C. Leibig’s law.

D. the Central Limit Theorem.

Question 2 of 20

The streamlined body shape of many aquatic organisms that
swim helps reduce frictional resistance caused

by water’s high:

A. buoyancy.

B. viscosity.

C. surface tension.

D. density.

Question 3 of 20

Molecules spontaneously move from an area of higher
concentration to an area of lower concentration in a

process known as:

A. conduction.

B. solution.

C. evaporation.

D. diffusion.

Question 4 of 20

Daily and seasonal fluctuations in temperature, salinity,
and dissolved gases are most extreme in:

A. the intertidal zone.

B. sandy beaches.

C. the estuary.

D. the open ocean.

Question 5 of 20 5.0/
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The rate of adiabatic cooling depends on the:

A. amount of moisture in the air.

B. temperature of the air.

C. latitude.

D. season.

Question 6 of 20

Seasonal variation in solar radiation, temperature, and day
length is due to the:

A. tilt of the Earth’s axis.

B. greenhouse effect.

C. Coriolis effect caused by the spinning of Earth on its
axis.

D. sunspot activities at the surface of the Sun.

Question 7 of 20

As light enters water, the last wavelengths absorbed are
_____ wavelengths.

A. red

B. yellow

C. green

D. blue

Question 8 of 20

The density of seawater increases when temperature:

A. and salinity decrease.

B. and salinity increase.

C. increases and salinity decreases.

D. decreases and salinity increases.

Question 9 of 20

The energy driving the global water cycle is provided by:

A. wind.

B. tides.

C. rotation of the Earth on its axis.

D. solar energy.

Question 10 of 20

The two major atmospheric gases that absorb energy from the
Sun are:

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A. oxygen and nitrogen.

B. nitrogen and hydrogen.

C. hydrogen and carbon dioxide.

D. carbon dioxide and water vapor.

Question 11 of 20 5.0/
5.0 Points

The soil-forming process occurring in cool, moist climates
of midlatitude regions where coniferous vegetation dominates is referred to as:

A. laterization.

B. podzolization.

C. gleization.

D. calcification.

Question 12 of 20 5.0/
5.0 Points

The soil horizon in which leached mineral particles such as
clay and salts tend to accumulate is the _____

horizon.

A. A

B. B

C. C

D. O

Question 13 of 20 5.0/
5.0 Points

A scientist measures the temperature of a lake at various
depths and finds very little variation between temperatures at the surface and
at the bottom of the lake. The temperature measurements were most likely taken
in a:

A. temperate lake during summer.

B. temperate lake during winter.

C. tropical lake during summer.

D. tropical lake during winter.

Question 14 of 20 5.0/
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In comparison with the epilimnion of a lake, the water of
the hypolimnion is:

A. warmer.

B. less dense.

C. cooler.

D. more oxygenated.

Question 15 of 20 0.0/
5.0 Points

The correct sequence of the scientific method is:

A. ask a question, observation, form a hypothesis, test a
hypothesis, form a theory.

B. form a hypothesis, ask a question, observation, test a
hypothesis, form a theory.

C. form a theory, ask a question, form a hypothesis,
observation, test a hypothesis.

D. observation, ask a question, form a hypothesis, test a
hypothesis, form a theory.

Question 16 of 20

The interaction of a biotic community and its abiotic environment
is referred to as a(n):

A. biosphere.

B. ecosystem.

C. population.

D. biome.

Question 17 of 20

Which of the following is a common soil anion?

A. NH4+

B. Ca2+

C. NO3—

D. Mg2+

Question 18 of 20

The purest form of water containing the fewest solutes
occurs in:

A. clouds.

B. surface water.

C. groundwater.

D. precipitation.

Question 19 of 20

Aluminum is toxic to plants because it:

A. destroys chlorophyll in the leaves, reducing the rate of
photosynthesis.

B. inhibits production of pollen, reducing the rate of
reproduction.

C. damages the roots, reducing nutrient uptake.

D. inhibits mitosis within the meristem tissues, reducing growth
of the stems.

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Question 20 of 20 5.0/
5.0 Points

Because ecology relies on many different branches of science
(e.g., geology), it is considered:

A. hypothetical.

B. unscientific.

C. permanent.

D. interdisciplinary.

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