5th - Science U5 L2 - Study Guide Flashcards
How can an organism be part of more than one food chain
When each type of organism can be eaten by more than one type of consumer
What does both a food chain and a food web show
They both show which predators eat which prey.
What happens when one population in a food web changes
All of the populations in the rest of the food web change also
What happens when a top carnivore is removed from a food web
The result is that prey populations are no longer controlled
Be able to answer questions if given a food web
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Be able to explain how the removal of the sea otter affected the kelp forest and other organisms in that food web
When that happened, fewer sea urchins were eaten so the kelp forests most disappeared because they were eaten by kelp. In other words, sea otters controlled sea urchin populations.
Be able to explain how one organism can be a consumer, an omnivore, a predator and prey
Each
Why do organisms compete in an ecosystem
Organisms struggle to get their share of each resource
Who competes in an ecosystem
organisms within a population compete with each other. populations of two different animals also compete for the same resources.
Know examples of biotic and abiotic factors
Biotic are living things (plants or animals)
Abiotic are nonliving things (water temperature, weather, soil, space to grow, shelter, sunlight)
What usually happens to the population of an ecosystem when overcrowding occurs
Overcrowding limits growth.
Be able to explain how overcrowding of algae can limit the population in its ecosystem
With overpopulation, algae will grow to be too thick and start to use up all of the oxygen then some algae dies as a result
Be able to explain when population will grow
A population grows when the number of births is higher than the number of deaths
What happens to the competition as a result of population growth
Competition for living space, food and other resources increases
Be able to answer questions about the exponential growth diagram
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