LS.9 Level 1

What is an ecosystem?

• A community of living organisms interacting with their physical environment

• A single species living in isolation

• A group of non-living things

• A type of weather pattern

Tags

VA.LS.9.c

Which of the following is an example of a biotic factor in an ecosystem?

• Sunlight

• Water

• Plants

• Rocks

Tags

VA.LS.9.c

What happens to a population when its habitat is destroyed?

• The population increases

• The population remains the same

• The population decreases

• The population becomes healthier

Tags

VA.LS.9.a

Which of the following is a disruption that can change species competition in an ecosystem?

• Introduction of a new predator

• Consistent weather patterns

• Stable food supply

• Balanced population sizes

Tags

VA.LS.9.b

What is a common result of a significant change in abiotic factors in an ecosystem?

• Increased biodiversity

• Ecosystem stability

• Changes in species populations

• No effect on the ecosystem

Tags

VA.LS.9.c

Which of the following is an abiotic factor that can affect an ecosystem?

• Animals

• Plants

• Temperature

• Bacteria

Tags

VA.LS.9.c

How can a change in habitat affect a population?

• It can lead to population growth

• It can cause population decline

• It can have no effect

• It can make the population immortal

Tags

VA.LS.9.a

What is the role of competition in an ecosystem?

• It helps maintain balance

• It causes extinction

• It has no role

• It only affects plants

Tags

VA.LS.9.b

Which of the following can cause a disruption in an ecosystem?

• Introduction of invasive species

• Stable climate conditions

• Balanced nutrient cycles

• Consistent water supply

Tags

VA.LS.9.b

What is a possible effect of a new species being introduced into an ecosystem?

• Increased competition for resources

• Decreased biodiversity

• No effect on existing species

• Immediate extinction of all species

Tags

VA.LS.9.b