Ecosystems and Energy

What is an ecosystem?

• An ecosystem is a man-made structure for plant growth.

• An ecosystem is a single organism in a controlled environment.

• An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system.

• An ecosystem is a group of unrelated organisms living together.

How do producers obtain energy?

• Fermentation

• Respiration

• Photosynthesis

• Chemosynthesis

Explain the role of consumers in an ecosystem.

• Consumers have no impact on the ecosystem

• Consumers help in controlling the population of other organisms and maintaining the balance of the ecosystem.

• Consumers disrupt the balance of the ecosystem

• Consumers only consume resources without contributing to the ecosystem

What is the difference between a food chain and a food web?

• A food chain involves only producers and consumers, while a food web includes decomposers.

• Food chains are more complex than food webs.

• In a food chain, organisms are arranged in a linear sequence, while in a food web, organisms are interconnected in a complex network.

• In a food chain, organisms are interconnected, while in a food web, organisms are arranged linearly.

Define the term 'energy pyramid' in the context of ecosystems.

• An energy pyramid is a graphical representation of the trophic levels in an ecosystem, showing the flow of energy from one level to another.

• An energy pyramid is a tool used to measure the temperature levels in an ecosystem.

• An energy pyramid is a structure made of energy sources in an ecosystem.

• An energy pyramid is a type of food chain in an ecosystem.

Why is it important to maintain a balance in an ecosystem?

• To reduce biodiversity and limit species interactions

• To ensure the survival of various species, prevent overpopulation, and maintain the overall health of the environment.

• To disrupt the natural balance and cause chaos

• To encourage rapid growth of a single species

Describe the process of photosynthesis and its significance in ecosystems.

• Photosynthesis is the process by which animals convert light energy into chemical energy.

• Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy stored in glucose molecules. It is significant in ecosystems as it is the primary way energy enters ecosystems, providing food for plants and other organisms.

• Photosynthesis is insignificant in ecosystems as it does not provide any benefits.

• Photosynthesis is only carried out by animals and not by plants.

What are some examples of decomposers in an ecosystem?

• Grass, trees, flowers

• Lions, tigers, bears

• Fungi, bacteria, worms, insects

• Sun, rain, wind

How do energy and nutrients flow through an ecosystem?

• Nutrients flow from the sun to consumers in an ecosystem.

• Energy flows from the sun to producers, then to consumers, and eventually exits as heat. Nutrients are recycled within the ecosystem through various biogeochemical cycles.

• Energy and nutrients flow independently without any connection in an ecosystem.

• Energy flows from consumers to producers in an ecosystem.

Discuss the impact of human activities on ecosystems and energy flow.

• Human activities only impact energy flow positively

• Human activities always benefit ecosystems

• Human activities have no impact on ecosystems

• Human activities can negatively impact ecosystems by disrupting biodiversity, habitats, and energy flow within food chains.