Habitat Changes & Population Impact LS.9A 8 SOL Review Station

What is a habitat?

• A type of food

• A place where an organism lives

• A type of weather

• A type of plant

Answer explanation

A habitat is defined as a place where an organism lives, providing the necessary conditions for survival. The other options do not accurately describe what a habitat is.

Which of the following is an example of a change in habitat?

• A tree growing taller

• A river drying up

• A bird singing

• A fish swimming

Answer explanation

A river drying up is a clear change in habitat, as it alters the environment where various species live. In contrast, a tree growing taller, a bird singing, and a fish swimming do not represent changes in habitat.

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Explain how a forest fire might affect the population of deer in that area.

• It will have no effect on the deer population.

• It will increase the deer population.

• It will decrease the deer population.

• It will cause the deer to change color.

Answer explanation

A forest fire can destroy habitat and food sources for deer, leading to a decrease in their population. Additionally, the immediate danger from the fire can cause direct harm or death to deer, further reducing their numbers.

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Describe a scenario where a change in habitat could lead to an increase in a specific animal population.

• A new predator is introduced.

• A disease spreads among the animals.

• A new food source becomes available.

• The climate becomes colder.

Answer explanation

A new food source becoming available can support a larger population of animals, as it provides the necessary nutrients for growth and reproduction. This can lead to an increase in their population, unlike the other options.

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If a wetland area is drained for development, what might happen to the frog population in that area?

• The frog population will increase.

• The frog population will decrease.

• The frog population will remain the same.

• The frog population will change color.

Answer explanation

Draining a wetland destroys the frogs' habitat, leading to a decrease in their population. Wetlands provide essential breeding and feeding grounds, so their loss directly impacts frog survival.

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How might the introduction of a new plant species affect the existing plant populations in a habitat?

• It will have no effect on existing plant populations.

• It will always increase existing plant populations.

• It could compete with existing plants for resources.

• It will cause existing plants to grow faster.

Answer explanation

The introduction of a new plant species could compete with existing plants for resources such as light, water, and nutrients, potentially affecting their growth and survival.

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What is one possible effect of deforestation on animal populations?

• Increase in animal populations

• Decrease in animal populations

• No change in animal populations

• Animals will become nocturnal

Answer explanation

Deforestation leads to habitat loss, which negatively impacts animal populations. As their living space diminishes, many species struggle to survive, resulting in a decrease in animal populations.

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Analyze how urban development might impact local wildlife populations.

• It will provide more food for wildlife.

• It will create more habitats for wildlife.

• It will reduce available habitats for wildlife.

• It will have no impact on wildlife.

Answer explanation

Urban development typically leads to habitat loss for wildlife, as natural areas are replaced with buildings and infrastructure. This reduces the space available for animals to live, feed, and reproduce, negatively impacting local wildlife populations.

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Predict the impact on a fish population if a dam is built on a river.

• The fish population will increase.

• The fish population will decrease.

• The fish population will remain the same.

• The fish will learn to live on land.

Answer explanation

Building a dam disrupts the natural flow of the river, affecting fish migration and spawning. This can lead to a decrease in the fish population due to habitat loss and reduced access to breeding grounds.

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What is one way that climate change can alter habitats?

• By making habitats colder

• By making habitats wetter

• By changing the availability of resources

• By making habitats smaller

Answer explanation

Climate change can alter habitats by changing the availability of resources such as food and water. This can lead to shifts in species distribution and ecosystem dynamics, making it a significant factor in habitat alteration.

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