Ecology
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Species, communities and ecosystems
SubtopicSpecies, communities and ecosystems under Ecology for Grade 12 IB.
Preview questions (no answers)
- 1.
What happens to the of the ocean as it absorbs more ?
A.The increases (becomes more basic)
B.The decreases (becomes more acidic)
C.The remains perfectly neutral at 7.0
D.The fluctuates wildly every hour
- 2.
Which of the following is NOT a greenhouse gas?
A.Carbon dioxide
B.Methane
C.Nitrogen gas
D.Nitrous oxide
- 3.
Which statement about the energy available to a secondary consumer is true?
A.It is more than the energy available to the primary consumer
B.It is exactly the same as the energy available to the producer
C.It is less than the energy available to the primary consumer
D.It is the sum of all energy in the ecosystem
Download the worksheet for Ecology - Species, communities and ecosystems to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
What is the primary way that energy enters the community of a deep-dark cave system without plants?
A.Moonlight
B.Organic matter falling from the surface
C.Heat from the cave walls
D.Energy created by the cave animals
- 2.
Which of the following would decrease the total energy available to an ecosystem?
A.An increase in sunlight
B.A decrease in the producer population
C.An increase in the saprotroph population
D.A decrease in the tertiary consumer population
- 3.
In an energy pyramid, what does the width of each bar represent?
A.The age of the organisms
B.The amount of energy per unit area per unit time
C.The number of species in that level
D.The height of the organisms
Download the worksheet for Ecology - Energy flow to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Which organisms are specifically known for producing methane in anaerobic conditions?
A.Mammals
B.Methanogens
C.Fungi
D.Algae
- 2.
Which gas is often trapped in porous rocks alongside crude oil?
A.Oxygen
B.Natural gas (Methane)
C.Nitrogen
D.Argon
- 3.
Which of the following is a byproduct of photosynthesis?
A.Carbon dioxide
B.Oxygen
C.Methane
D.Peat
Download the worksheet for Ecology - Carbon cycling to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
What is the scientific term for the trapping of heat in the atmosphere by certain gases?
A.The Albedo Effect
B.The Greenhouse Effect
C.The Coriolis Effect
D.The Doppler Effect
- 2.
How does the loss of snow cover affect the temperature of the land beneath it?
A.The land stays cooler because it is exposed to wind
B.The land warms up faster because it absorbs more solar radiation
C.The land temperature does not change
D.The land freezes more deeply
- 3.
Which of the following is NOT a consequence of rising global temperatures?
A.Melting of glaciers
B.Rise in sea levels
C.Increased volcanic eruptions
D.Shifts in species distribution
Download the worksheet for Ecology - Climate change to practice offline. It includes additional chapter-level practice questions.