Population and Resources
Vocabulary
Population and Resources 2
Short Response
100
Over 50 years, the size of a tiger population increased. What best explains the increase in the size of the tiger population?
A lot of tigers were born and none of them died.
The tiger population is always increasing because no animals eat tigers.
Fewer tigers were born than died.
More tigers were born than died.
4. More tigers were born than died.
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.
200
A large population of ducks live in an area with a lake. In the last 40 years, the size of the duck population stayed the same. What must be true about the duck population during the last 40 years?
The number of ducks that were born were the same as the number of ducks that died.
No ducks were born and no ducks died.
Humans started protecting the duck population so they stopped dying.
The ducks did not have any baby ducks during these years.
1. The number of ducks that were born were the same as the number of ducks that died.
200
What is an ecologist?
a scientist who studies the interactions of organisms with each other and their environment
200
Scientists have been studying the size of three populations in a grassland. In this ecosystem, hawks (a large type of bird) eat sparrows (a small type of bird), and sparrows eat seeds from buckwheat. The data showed that all three populations were stable. Then the hawk population increased suddenly. What will likely happen to the size of the sparrow population as a result?
The size of the sparrow population will...
1. Stay the same. The size of their resource population did not change, so the amount of energy storage molecules available for the sparrows did not change. There will be the same number of births and deaths in the sparrow population.
2. Decrease. The larger hawk population will leave fewer energy storage molecules available for the sparrows, so the sparrow population will reproduce less. This will lead to fewer births in the sparrow population.
3. Decrease. The larger hawk population will need more energy storage molecules, so they will eat more sparrows. This will lead to more deaths than births in the sparrow population.
4. Increase. An increase in any population leads to an increase in the sizes of all other populations in the ecosystem.
3. Decrease. The larger hawk population will need more energy storage molecules, so they will eat more sparrows. This will lead to more deaths than births in the sparrow population.
200
Explain what the arrow means in the food web below.
Arrow show where the energy is going
(____ gives energy to _____)
300
A population of mice lives in the northeastern United States. Over the last 50 years, the size of the mouse population decreased. What best explains the decrease in the size of the mouse population?
Fewer mice were born than died
A lot of mice died and no new mice were born.
More mice were born than died.
The mouse population is always decreasing because mice are always being eaten.
1. Fewer mice were born than died
300
Stability is?
When something stays mostly the same over time
300
Scientists have been studying the size of three populations in an ecosystem. In this ecosystem, herons (a type of bird) eat frogs, and frogs eat dragonflies. What would likely happen to the frog population if the dragonfly population suddenly increased?
The size of the frog population will....
Increase because an increase in any population in an ecosystem will cause an increase in the sizes of all other populations.
Increase because the larger dragonfly population will provide more energy storage molecules for the frog population, so they will reproduce more. This will lead to more births than deaths in the frog population.
Decrease because the larger dragonfly population will take more energy storagemolecules from the ecosystem, leaving fewer available for the frog.
Stay the same because the size of its consumer population did not change, so thenumber of deaths in the frog population did not change
2. Increase because the larger dragonfly population will provide more energy storage molecules for the frog population, so they will reproduce more. This will lead to more births than deaths in the frog population.
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
400
A population of bluefish lives in the Gulf of Mexico. Over the last 50 years, the size of the bluefish population has decreased. What best explains the decrease in the size of the bluefish population?
A lot of bluefish died and no new bluefish were born.
More bluefish were born than died.
Fewer bluefish were born than died.
The bluefish population is always decreasing because bluefish are always being
eaten.
3. Fewer bluefish were born than died.
400
When two or more populations use the same resource, such as the same food source
Consumer Population
400
A group of scientists has been observing a population of meerkats in Botswana. They notice that the size of the population has not changed much between 200 and 2016. The population size did not change between 2000 and 2016. Theo thinks that the population size stayed the same because no new meerkats were born and none died. They were all the same meerkats. Fabiola thinks that it is not possible that all the same meerkats were in the population for the whole time. Which scientist is correct?
a. Theo
b. Fabiola
c. Neither Fabiola or Theo are correct d. Both Theo and Fabiola are correct
b. Fabiola
400
How does placing a cold washcloth on your forehead helps to reduce a fever? Explain your answer
Answers will vary
500
Why do birds such as eagles and hawks need energy?
Flying
Breathing
Digesting food
All of the above
4. All of the above
500
What is a food web?
a model that shows what eats what and who receives energy from whom in an ecosystem (eating relationship)
500
What do mammals like tigers and zebras need energy for?
1. Running
2. Breathing
3. Digesting food 4. All of the above
4. All of the above
500
How can the decrease in alligators affect great blue herons in the area?
The decrease in one would would result in the alligators needed fewer energy storage molecules , so fewer herons would be eaten by alligators, causing fewer deaths in the heron population. This would lead to a increase in the heron population.