TOEFL Listening Practice Test

KEY WORDS:
decades
greenhouse gases
atmosphere
trap radiation
passes into
pass out
KEY WORDS:
increasingly conscious
daily activities
KEY WORDS:
publicity
general public
verify
real scientists
KEY WORDS:
embarrassment
With that in mind
clear up
hot topic
carbon dioxide
KEY WORDS:
absorbs
vapor
methane
naturally occurring
KEY WORDS:
fossil fuels
petroleum
machines
manufacturing processes
KEY WORDS:
sources
public attention
waste product
KEY WORDS:
by-products
respiration
breathe in/out
use up
oxygen
air
KEY WORDS:
So do
natural life cycle
a way of dealing with
KEY WORDS:

amount
floating around
soaked it up
KEY WORDS:

soluble
root's related to
dissolve
KEY WORDS:

pulled readily out
KEY WORDS:

on balance
absorb
artificially
be emitted
as Jason put it
KEY WORDS:

Unfortunately
solution to
KEY WORDS:

current models
mix into seawater
KEY WORDS:

And even then
the short and medium term
rely on
take up the slack
KEY WORDS:

Okay
plants
KEY WORDS:

kind of surprised
mentioned
require
photosynthesis
KEY WORDS:

dense the growth
Such an area
old-growth
in large quantities
carbon sink
KEY WORDS:

sucked in/down
drain
wash the dishes
KEY WORDS:

algae seaweed
marine plants
perform photosynthesis
plants on land
It's just that
KEY WORDS:

release
as well as
a forest fire
dies of old age
decays
KEY WORDS:

only holds
over its lifetime
interesting part
unlike
make the energy
KEY WORDS:

populated industrialized
increased levels
stimulate
growth
KEY WORDS:

fuel
dense and lush
used up
in response to
environment
KEY WORDS:

have suggested
natural phenomenon
greenhouse gases
Now listen to the question and choose the best answer.
1. A new solution for carbon dioxide pollution.
2. How nature controls the amount of carbon dioxide in the atmosphere.
3. Two ways carbon dioxide is absorbed by the ocean.
4. Types of plants used to absorb excess carbon dioxide.
Now listen to the question and choose the best answer.
1. Most sources of carbon dioxide are far from the ocean.
2. Seawater takes in carbon dioxide very slowly.
3. The oceans have already absorbed their limit of carbon dioxide.
4. The number of marine plants is decreasing.
Now read the question and choose the best answer.

Why does the professor mention that carbon dioxide is a by-product of respiration?
1. To emphasize the importance of carbon dioxide to life on Earth.
2. To explain the need for more scientific writings about the environment.
3. To provide some background information for a discussion of carbon dioxide.
4. To give an example of the dangers of environmental pollution.
Now read the question and choose the best answer.
1. Sinks
2. Greenhouses
3. Algae
4. Wastes
Now read the question and choose the best answer.

Why does the professor mention that carbon dioxide is a by-product of respiration?
1. To emphasize the importance of carbon dioxide to life on Earth.
2. To explain the need for more scientific writings about the environment.
3. To provide some background information for a discussion of carbon dioxide.
4. To give an example of the dangers of environmental pollution.
Now listen to the question and answer the question.
1. She is not sure about the origin of the word.
2. She has previously explained the meaning of the word.
3. The students should understand the meaning of the term.
4. She is using the term in an unusual way.
Now listen to the question. Click on 2 answers.
1. Plants never release carbon dioxide back into the atmosphere.
2. The rate of absorption by plants can increase rapidly.
3. Plants immediately use what they absorb.
4. Plants do not convert carbon dioxide into other chemicals.