Population and Resources
Vocabulary
More Population and Resources
Short Response
IXL Questions
100
If the death rate decreases in a population over time and it is lower than the birth rate, the population will __________.
Increase
100
A molecule that organisms can use to release the energy they need to survive
Energy Storage Molecule
100
What is a consumer population?
The population that is eating another population for energy storage molecules.
100
There has been a sudden decrease in the amount of zooplankton in the food web. What impact would this have on both the moon jelly and walleye pollock?
less zooplankton pop. = less ESM available for Moon jelly & walleye pollock = less reproduction = less births than deaths = decrease in population.
100
The producer in this food chain is the _____________. It is eaten by the ______________, the ___________ consumer.
What is algae, zooplankton and primary
200
Pandas are going extinct in the wild. The panda breeding program has had three pandas being born and three pandas dying in captivity over three years. The population in the breeding program is?
Stable or stability
200
What is a community?
two or more living things in a particular area
200
What is the grass in this ecosystem?
Producer
200
Explain what the arrow means in the food web below.
Arrow show where the energy is going
(____ gives energy to _____)
200
Matter (energy) moves in this ecosystem when the producer the wheatgrass is eaten by the ____________. Matter moves from the primary consumer to the secondary consumer when the ____________ is eaten by the ______________________.
What is the katydid, katydid and deer mouse.
300
Mice did not live in Australia until they were brought on ships from other countries. Ever since Australia released the cats five years ago, 250,000 mice were born, and 300,000 have died. What happened?
The population decreased
300
What is an indirect effect?
When something causes an effect, and that effect causes another effect
300
What is the python in this ecosystem?
Tertiary consumer
300
Analyze the food web and answer the following question: What change can you make to the food web that will cause the stingwing population to increase?
Answers will vary
300
The tertiary consumer is the _____________ in this ecosystem. It is eaten by the __________, the top consumer.
What is the long-tailed weasel, and golden eagle
400
Over time the hawk population increased in size, what will happen to the sparrow AND the buckwheat populations as a result?
The sparrow pop. will decrease and the buckwheat population will increase.
400
When two or more populations use the same resource, such as the same food source
Competition
400
Why do all arrows in a food chain point towards the decomposer?
Because the decomposer breaks down dead matter - all living organisms when they die and uses their dead matter to create their own energy
400
What do mammals like tigers and zebras need energy for?
They need energy for EVERYTHING! Eating, breathing, running, reproducing, etc...
400
What are the two decomposers and three producers in this food chain?
The two decomposers are the earth worm and the mushroom. The three producers are the lichen, the bear sedge, and the bilberry.
500
The wolf population increased in size, what will happen to the coyote population as a result? And explain why!
The coyote population will decrease because their resource, the deer population will decrease due to an increase in deaths. The increase in deaths in the deer population is caused by the increase in their consumer, the wolf. This shows an INDIRECT EFFECT and COMPETITION
500
Name all the parts of a food chain from bottom to top!
What is producer --> primary consumer --> secondary consumer --> tertiary consumer --> top consumer --> decomposer
500
Imagine you are observing a forest ecosystem. Describe how energy flows through this ecosystem, including the roles of producers, primary consumers, secondary consumers, and tertiary consumers. Explain how energy moves from each organism to the next. Come up with your own organisms in this ecosystem.
Answers will vary.
500
The tuna population increased, explain what happens to all four other organisms in this food chain - use birth rate, death rate, consumer, resource, and indirect effect in your answer.
The squid population will decrease due to an increased death rate from being hunted more by the tuna (the consumer). The herring population will increase because they are being hunted less by their consumer population (the squid) due to a loss in their population. Last, the dolphin population will decrease because their resource population (the squid) will be decreasing in size due to an increase in their competition, the tuna.
500
The owl is a ________ consumer in this food chain. The grizzly bear is a ________ consumer and ________ consumer in this food chain.
The owl is a tertiary consumer, the grizzly bear is both primary and secondary consumer (an omnivore).