Ecosystems
Geography ⇒ Environmental Geography
Ecosystems starts at 6 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Ecosystems.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 12
Define an ecosystem and explain its main components.
Describe the impact of invasive species on native ecosystems.
Describe the process of biomagnification and its effects on top consumers.
Describe the role of producers in an ecosystem.
Explain the concept of 'ecological balance' and its importance.
Explain the concept of ecological succession.
A grassland ecosystem has a net primary productivity (NPP) of 800 g/m²/year and a gross primary productivity (GPP) of 1200 g/m²/year. Calculate the amount of energy used in plant respiration.
A pond ecosystem receives excess nutrients from agricultural runoff, leading to algal blooms. What is this process called? (1) Eutrophication (2) Succession (3) Biomagnification (4) Denitrification
A pond ecosystem receives excess nutrients from agricultural runoff, leading to algal blooms. What is this process called? (1) Eutrophication (2) Succession (3) Biomagnification (4) Denitrification
Which of the following best describes the term 'trophic level'? (1) The position an organism occupies in a food chain (2) The total biomass in an ecosystem (3) The rate of photosynthesis (4) The amount of rainfall in an area
Which of the following is a characteristic of a climax community? (1) High rate of change (2) Instability (3) Maximum biodiversity (4) Absence of decomposers
Which of the following is a major threat to coral reef ecosystems? (1) Overfishing (2) Acid rain (3) Deforestation (4) Desertification
Fill in the blank: The largest reservoir of carbon in the biosphere is __________.
Fill in the blank: The process by which atmospheric nitrogen is converted into a usable form by bacteria is called __________.
Fill in the blank: The process by which water moves from the soil to the atmosphere through plants is called __________.
Fill in the blank: The total amount of living material present in an ecosystem at a given time is called __________.
State whether the following statement is true or false: All ecosystems have the same level of biodiversity.
State whether the following statement is true or false: All producers are autotrophs.
State whether the following statement is true or false: Decomposers are essential for nutrient cycling in an ecosystem.
State whether the following statement is true or false: In a food chain, energy is lost at each trophic level mainly as heat.
