Question

Which statement BEST describes how greenhouse gases act as natural insulators in the Earth's system?

A) The gases absorb and emit a part of the heat reflected by Earth’s surface.
B) The gases receive the Sun’s heat directly and deflect a part of it toward Earth’s surface.
C) The gases are formed by the burning of fossil fuels, as a result of which they are very hot.
D) The gases react with each other in the presence of sunlight and release energy in the form of heat.
25)
Farmer Scott is one of the best farmers in town. During the middle of the corn growing season, Farmer Scott had to travel out of town for two weeks, and he left his acres of corn plants alone with no chemicals or other protection.

In terms of succession, which of these best describes what Framer Scott returned to after the two weeks?
A) Small weeds began to grow and develop.
B) There was no distinct change in the corn fields.
C) All of the corn died due to a rampant corn disease.
D) The corn mutated to form a new species of vegetable.
26)


Lichens, represented by this symbiotic relationship, are responsible for _____________ or the establishment of a new site for plant growth.
A) primary succession
B) secondary succession
C) trophic metamorphosis
D) ecological infiltration
27)
Which describes an example of ecological succession?
A) A caterpillar developing into a butterfly.
B) A meadow replacing a pond in its flood plain.
C) A climate gradually changing over many eons and becoming colder.
D) The replacement of a native species of animal with an invasive species.
28)
How do beaver dams contribute to species diversity in the ecosystem?
A) provide access to food in winter
B) keep predators away from the ecosystem
C) provide a habitat for a variety of species
D) ensure that only beavers have access to water
29)
Volcanoes play an important role in determining climate change. When a volcano erupts it throws out large volumes of ______________ gas and ash into the atmosphere which can influence climatic patterns for years.
A) nitrogen
B) oxygen
C) sulfur dioxide
D) carbon dioxide
30)
This is the term for the weather patterns that an area experiences over a long period of time?
A) climate.
B) weather.
C) available energy.
D) position in space.

Answer 1

Answers:

A. The gases absorb and emit a part of the heat reflected by the Earth's surface

A. Small weeds began to grow and develop.

A. Primary succession

B. A meadow replacing a pond in its flood plain

C. Provide a habitat for a variety of species

C. Sulfur dioxide

A. Climate

Answer 2

The answers are as follows:

A. The gases absorb and emit a part of the heat reflected by the Earth's surface

What happens in the greenhouse effect is solar radiation will go through the atmosphere first. Some will pass through and reach the Earth's surface. Some of the radiation that hits the Earth's surface will be converted into long-wave thermal radiation and this is what will be absorbed by the greenhouse gases.

The greenhouse gases emit them back to the Earth.

A. Small weeds began to grow and develop.

This is an example of primary succession. The corn paved a way for more plant life to grow.

A. Primary succession

Lichens are considered as pioneer species. They are usually the first organisms to colonize bare rock. They break down rocks which help the process of soil formation. When they die, they provide organic matter that also contribute to soil.

B. A meadow replacing a pond in its flood plain

This is a good example of secondary succession. Flood plains are vulnerable to floods, which can clear the vegetation and new vegetation grows out from the wreckage once the flood goes down.

C. Provide a habitat for a variety of species

Beaver dams provide a habitat for a variety of species like insects, fishes, and the like. It also provides a good habitat for plants. The availability of these resources attract more species.

C. Sulfur dioxide

Sulfur dioxide has a greater impact on climate. Although CO2 is also spewed from a volcano, its effect is not as great as the sulfur dioxide. Sulfur dioxide is converted in sulfuric acid that form sulfate aerosols. These aerosols increase the reflection of solar radiation, thus results in the cooling of the Earth.

A. Climate

By definition, climate is the statistics of weather in a certain place over a long period of time. Or the prevailing weather in an are over a long period of time.