Questions
Make the general question:
Lake Erie is dying as a result of wastes produced by people
Is Lake Erie dying as a result of wastes produced by people?
Any ecosystem is made up of 2 parts. Which?
living and non-living
People have a great and (to grow) effect on many other ecosystems
growing
The ... parts of an ecosystem often affect the nonliving parts.
living
Insert the correct conjuction:
Producers take substances ... carbon dioxide, water, oxygen, nitrogen, and sulfur from the environment.
such as
Make the special question:
People have studied ecology for many thousands of years.
Have people or aliens studied ecology for many thousands of years? )
The third major group of organisms using dead plant and animal material as food
decomposers
A pond ecosystem usually contains all of the nonliving factors (to mention) above
mentioned
The ... provides the energy of life.
Sun
Insert the correct preposition:
As ecologists study ecosystems, they often turn to the science of meteorology ... information
for
Make the alternative question:
The Indians of the North American plains knew a great deal about the ecology of the bison.
Did the Indians of the North American plains know a great deal about the ecology of the bison or the lion?
green plants which capture radiant energy from the sun and convert it into food energy
producers
(To convert) into ice, the water composition is not changed.
being converted
The planteaters get their energy directly from the ... plants.
green
Active or Passive?
These nonliving parts of the ecosystem (to determine) by the kinds of life that can exist in an ecosystem
Passive: are determined
Make the question to the subject:
Hundreds of books were published on the behavior of animals
What was published on the behavior of animals?
animals that depend on green plants for food
consumers
Air (to pass) over cold water areas cooled by 2 degrees centigrade.
having passed
The world's deserts, for example, occur where the annual rainfall is ten ... or less.
inches
Make the correct comparative of an adjective:
The (high) the sun, the greater the amount of heat a given horizontal surface will receive.
higher
Make the tag question:
The world's ecosystem is more complex than we can think.
The world's ecosystem is more complex than we can think, isn't it?
they include tiny animals called zooplankton and larger organisms, such as pollywogs, insects, and snails, which eat larger plants.
plantfeeders
(To improve) by rapid scientific and technological advances, the accuracy of short-term weather forecasts amounts to about 90% nowadays.
having been improved
The decomposers ... down this material, getting the energy they need to live
break
Which grammar tense shall we use?
In the late 1800s and early 1900s, however, scientists (to begin) to study populations of organisms, rather than individuals. About
past simple: began