ESS PRACTICE PART 1 MULTIPLE CHOICE | 2026 |
QUESTIONS & ANSWERS
Leaching of soil nutrients is an example of
A. transfer of materials.
B. transformation of materials.
C. transfer of energy.
D. transformation of energy. - Answers - A
The Second Law of Thermodynamics states that in any
A. open system, entropy tends to increase spontaneously.
B. open system, entropy tends to decrease spontaneously.
C. isolated system, entropy tends to increase spontaneously.
D. isolated system, entropy tends to decrease spontaneously. - Answers - C
Which is an example of negative feedback?
A. Loss of vegetation leading to soil erosion leading to further loss of vegetation.
B. A decline in a large predator population after they have eaten most of their prey
population.
C. Melting of permafrost in the tundra due to climatic change leading to further release
of
methane, causing further change.
D. Unsustainable slash and burn agriculture practices in tropical rain forests. - Answers
-B
A lake with a stream flowing into it, but with water lost only by evaporation, is an
example of a system which is
A. isolated.
B. stable and closed.
C. unstable and closed.
D. open. - Answers - D
Which of following factors would prevent the ecosphere being classified as a closed
system?
A. the input of solar energy
B. the re-radiation to space of heat energy
C. the arrival of rocks as meteorites from space
D. the unstable state of equilibrium - Answers - C
Most food chains seldom have more than four tropic levels because
A. in most ecosystems, competition for food is very great.
B. the total biodiversity in any ecosystem is limited.
C. energy is lost as it moves along a food chain and little remains at the level of the top
carnivore.
, D. in many parts of the world, many species have become extinct and complex
ecosystems are rare. - Answers - C
Which of the statements about negative feedback is correct?
A. Negative feedback amplifies or increases change in a system.
B. Negative feedback consumes energy from a system.
C. Negative feedback is undesirable for the environment.
D. Negative feedback counteracts deviation from equilibrium in a system. - Answers - D
Over a long period of time, energy input to a system is
A. always equal to energy output.
B. usually greater than energy output.
C. always greater than energy output.
D. always less than energy output. - Answers - A
Which of the following can be considered an isolated system?
A. A rock in the bottom of the ocean
B. A small island
C. A spider on a tree
D. The entire cosmos - Answers - D
Which statement best describes the second law of thermodynamics?
A. In all ecosystems, energy is neither created nor destroyed, but it may be converted
from one form to another.
B. Energy cannot leave a system.
C. The entropy of a system always remains constant for a spontaneous process.
D. In any isolated system entropy tends to increase spontaneously - Answers - D
Which of the following descriptions best represents a closed system?
A. It exchanges energy but not matter.
B. It exchanges neither matter nor energy.
C. It exchanges matter but not energy.
D. It exchanges matter and energy. - Answers - A
What does the first law of thermodynamics tell us?
A. Doing work always creates heat.
B. Entropy tends to increase.
C. Energy cannot be recycled.
D. All energy comes from other energy. - Answers - D
Which of the following best describes the result of positive feedback in a system?
A. The system changing further in the same direction
B. The system remaining stable
C. The system changing in the opposite direction
D. The system remaining unchanged - Answers - A
QUESTIONS & ANSWERS
Leaching of soil nutrients is an example of
A. transfer of materials.
B. transformation of materials.
C. transfer of energy.
D. transformation of energy. - Answers - A
The Second Law of Thermodynamics states that in any
A. open system, entropy tends to increase spontaneously.
B. open system, entropy tends to decrease spontaneously.
C. isolated system, entropy tends to increase spontaneously.
D. isolated system, entropy tends to decrease spontaneously. - Answers - C
Which is an example of negative feedback?
A. Loss of vegetation leading to soil erosion leading to further loss of vegetation.
B. A decline in a large predator population after they have eaten most of their prey
population.
C. Melting of permafrost in the tundra due to climatic change leading to further release
of
methane, causing further change.
D. Unsustainable slash and burn agriculture practices in tropical rain forests. - Answers
-B
A lake with a stream flowing into it, but with water lost only by evaporation, is an
example of a system which is
A. isolated.
B. stable and closed.
C. unstable and closed.
D. open. - Answers - D
Which of following factors would prevent the ecosphere being classified as a closed
system?
A. the input of solar energy
B. the re-radiation to space of heat energy
C. the arrival of rocks as meteorites from space
D. the unstable state of equilibrium - Answers - C
Most food chains seldom have more than four tropic levels because
A. in most ecosystems, competition for food is very great.
B. the total biodiversity in any ecosystem is limited.
C. energy is lost as it moves along a food chain and little remains at the level of the top
carnivore.
, D. in many parts of the world, many species have become extinct and complex
ecosystems are rare. - Answers - C
Which of the statements about negative feedback is correct?
A. Negative feedback amplifies or increases change in a system.
B. Negative feedback consumes energy from a system.
C. Negative feedback is undesirable for the environment.
D. Negative feedback counteracts deviation from equilibrium in a system. - Answers - D
Over a long period of time, energy input to a system is
A. always equal to energy output.
B. usually greater than energy output.
C. always greater than energy output.
D. always less than energy output. - Answers - A
Which of the following can be considered an isolated system?
A. A rock in the bottom of the ocean
B. A small island
C. A spider on a tree
D. The entire cosmos - Answers - D
Which statement best describes the second law of thermodynamics?
A. In all ecosystems, energy is neither created nor destroyed, but it may be converted
from one form to another.
B. Energy cannot leave a system.
C. The entropy of a system always remains constant for a spontaneous process.
D. In any isolated system entropy tends to increase spontaneously - Answers - D
Which of the following descriptions best represents a closed system?
A. It exchanges energy but not matter.
B. It exchanges neither matter nor energy.
C. It exchanges matter but not energy.
D. It exchanges matter and energy. - Answers - A
What does the first law of thermodynamics tell us?
A. Doing work always creates heat.
B. Entropy tends to increase.
C. Energy cannot be recycled.
D. All energy comes from other energy. - Answers - D
Which of the following best describes the result of positive feedback in a system?
A. The system changing further in the same direction
B. The system remaining stable
C. The system changing in the opposite direction
D. The system remaining unchanged - Answers - A
