Read About It: Ecosystem Disruptions

Multiple Choice

How does energy move through food webs?

• Through water cycles

• In the form of food

• Via sunlight

• Through soil nutrients

Multiple Choice

How does energy transfer occur in food webs?

• Randomly

• In predictable patterns

• Only during the day

• Only in summer

Multiple Choice

What are the main factors that cause population changes in ecosystems?

• Climate and weather

• Number of producers and consumers

• Soil and water quality

• Human activities

Multiple Choice

How do changes in one population affect others in a food web?

• They have no effect

• They can affect the others

• They only affect producers

• They only affect consumers

Multiple Choice

How does a rise in birth rate affect a population?

• The population size decreases.

• The population size remains constant.

• The population size can increase.

• The population becomes extinct.

Multiple Choice

What can happen to a population if the death rate rises more than usual?

• The population size can increase.

• The population size can decrease.

• The population size remains the same.

• The population becomes more diverse.

Multiple Choice

Which factor can cause a population size to increase or decrease?

• Moving In

• Moving Out

• Birth Rate

• Death Rate

Multiple Choice

What was the impact of hunting sea otters on the food web?

• It only affected sea otters

• It impacted energy transfers throughout the food web

• It had no impact

• It improved the food web

Multiple Choice

What was the result of sea otters being hunted almost to extinction?

• Increased sea otter population

• Impacted energy transfers in the food web

• Improved ecosystem balance

• Decreased predator population

Multiple Choice

What happened to the sea urchin population when otters were removed?

• It decreased

• It remained stable

• It rose

• It disappeared

Multiple Choice

What is the primary food source for crabs mentioned in the diagram?

• Kelp

• Mussels

• Detritus

• Sea stars

Multiple Choice

What is the main consequence of removing a predator from the food web?

• Increase in prey population

• Decrease in prey population

• No change in prey population

• Extinction of prey

Multiple Choice

What happens to the mussel population when their predators remain?

• It increases

• It decreases

• It remains stable

• It fluctuates

Multiple Choice

What can cause the removal of populations according to the text?

• Climate change

• Natural disasters

• Human intervention

• Disease

Multiple Choice

What happens when population changes occur in an ecosystem?

• Energy transfers in the food web change

• New species are created

• The ecosystem becomes stable

• The climate becomes warmer

Multiple Choice

What is a direct result of environmental changes in an ecosystem?

• Changes in birth or death rates

• Technological advancements

• Political decisions

• Cultural shifts

Multiple Choice

What happens to a population if it loses access to food, water, and shelter?

• It thrives

• It is unaffected

• It is affected

• It grows rapidly

Multiple Choice

What type of tree seeds usually only grow after a fire?

• Oak tree seeds

• Pine tree seeds

• Jack pine tree seeds

• Maple tree seeds

Multiple Choice

What is a consequence of rodent poison in food webs?

• Increase in bird populations

• More predators eating rodents

• Fewer predators eating rodents

• Increase in rodent populations

Multiple Choice

What is a potential effect of population changes in food webs?

• Increased energy transfer

• Serious disruptions in energy transfer

• Stabilization of food webs

• Decrease in decomposer activity

Multiple Choice

What happens to birds of prey when they consume poisoned rodents?

• They thrive

• They are unaffected

• They are poisoned

• They increase in number

Multiple Choice

Where is Kudzu considered an invasive species?

• Europe

• Asia

• Australia

• United States