Ecosystems Flashcards
What is an ecosystem?
An ecosystem is a community of living organisms interacting with their physical environment.
True or False: A pond ecosystem is an example of a freshwater ecosystem.
True
What are the main components of an ecosystem?
The main components are producers, consumers, and decomposers.
Fill in the blank: The first level in a food chain consists of __________.
producers
What role do decomposers play in an ecosystem?
Decomposers break down dead organic matter, recycling nutrients back into the ecosystem.
Multiple choice: Which of the following is a primary consumer? a) Grass b) Rabbit c) Fox
b) Rabbit
What is a food chain?
A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.
True or False: Energy decreases as it moves up the levels in a food chain.
True
What is a food web?
A food web is a complex network of interconnected food chains in an ecosystem.
Fill in the blank: In a pond ecosystem, __________ are typically the primary producers.
aquatic plants
Multiple choice: Which organism is at the top of the food chain in a pond ecosystem? a) Algae b) Fish c) Heron
c) Heron
What happens to energy as it moves from one trophic level to the next?
Energy is lost as heat and through metabolic processes, usually about 90% is lost.
True or False: Omnivores can occupy multiple trophic levels.
True
What is biodiversity?
Biodiversity refers to the variety of life in a particular habitat or ecosystem.
Fill in the blank: __________ are organisms that make their own food through photosynthesis.
Producers
Multiple choice: In a food chain, which organism would be considered a secondary consumer? a) Grasshopper b) Frog c) Sun
b) Frog
What is a trophic level?
A trophic level is a position in a food chain or food web that indicates the flow of energy and nutrients.
True or False: All food chains start with a consumer.
False
What type of organism is a herbivore?
A herbivore is an organism that primarily eats plants.
Fill in the blank: The process by which plants convert sunlight into energy is called __________.
photosynthesis
Multiple choice: What is the main source of energy for most ecosystems? a) The moon b) The sun c) Water
b) The sun
True or False: Energy can be recycled in an ecosystem.
False
What is the significance of a food web compared to a food chain?
A food web provides a more comprehensive view of how energy and nutrients flow through an ecosystem.
Fill in the blank: __________ are organisms that eat both plants and animals.
Omnivores
Multiple choice: Which of the following is not a producer? a) Seaweed b) Duckweed c) Fish
c) Fish
What are abiotic factors?
Abiotic factors are the non-living components of an ecosystem, such as temperature, water, sunlight, soil, and air.
True or False: Biotic factors include all living organisms in an ecosystem.
True
Fill in the blank: The interaction between abiotic and biotic factors is crucial for _____ in ecosystems.
sustainability
Which of the following is NOT an abiotic factor? A) Temperature B) Plants C) Soil D) Water
B) Plants
Name two examples of biotic factors.
Examples of biotic factors include animals and plants.
