Biotic & Abiotic Factors
What is a biotic factor in an ecosystem?
A living component like plants or animals
Where do arrows point in a food web?
To the consumer.
Which level includes plants?
Producers.
Where does energy in ecosystems come from?
The Sun.
What is a producer?
Makes its own food.
Which of these is an abiotic factor: Wind, bird, or grass?
Wind
What is a food web?
Interconnected food chains.
What is a trophic level?
An organism's position in a food chain.
What is the producer's role in energy flow?
Convert sunlight into energy. (photosynthesis)
What is a consumer?
Eats other organisms.
Provide an example of an abiotic factor.
Temperature
Wind
Rocks
Water
Light
Swell
Where are producers in a food web?
At the base.
What level are herbivores in?
Primary consumers.
Why can't food chains have unlimited levels?
Energy runs out.
Give an example of a primary consumer.
Grasshopper.
Rabbit.
Mouse.
What abiotic factor do plants need for photosynthesis?
Sunlight
Why are food webs more realistic?
Organisms eat multiple foods.
What trophic level do carnivores that eat herbivores belong to?
Secondary consumers.
What happens to energy as it flow up trophic levels?
It reduces.
What is most likely to happen to the producers if tertiary consumers are removed from a food web?
Producers are most likely to increase initially.
What abiotic factor limits which animals can survive in a desert?
Temperature or water availability.
What happens if secondary consumers disappear?
Overpopulation of primary consumers
What is the third trophic level?
Secondary consumers
Why does energy decrease at each level?
Lost as heat and waste
Name an omnivore and the trophic levels it occupies.
Humans, primary and secondary.
Dogs, primary and secondary.
Birds, primary and secondary.