Ecosystems – Study Guide

What are the 4 levels of organization of an ecosystem in order?

• Organism → Population → Community → Ecosystem

• Ecosystem → Community → Population → Organism

• Community → Ecosystem → Organism → Population

• Population → Organism → Ecosystem → Community

Which one of the following examples is an organism?

• plant

• a dead animal

• oxygen

• an ecosystem

Tags

NGSS.MS-LS1-1

Which term describes a group of the same species living together in a particular habitat?

• A population

• A community

• An ecosystem

• A biome

Which of the following are examples of biotic factors in an ecosystem?

• trees, deer, bacteria, and mushrooms.

• rocks, water, air, and sunlight.

• carbon, hydrogen, nitrogen, and oxygen.

• temperature, wind, and sun

Tags

NGSS.MS-LS2-2

Which of the following are examples of abiotic factors?

• Water, Sunlight, Temperature, Rocks

• Animals, Plants, Bacteria, Fungi

• Fungi, Sunlight, Temperature, cactus

• Sunlight, Climate, dead animal, mushrooms

Tags

NGSS.MS-LS2-3

What are the differences between IMMIGRATION and EMIGRATION?

• Immigration is when organisms move into a population, and emigration is when they leave.

• Immigration is when organisms leave a population, and emigration is when they move in.

• Immigration and emigration both refer to organisms moving into a population.

• Immigration and emigration both refer to organisms leaving a population.

Tags

NGSS.MS-LS2-4

What is the role of a LIMITING FACTOR in an ecosystem?

• It restricts the availability of resources, thus controlling population growth.

• It enhances resource availability, leading to population growth.

• It has no effect on resource availability or population growth.

• It exclusively impacts the population of herbivores.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following is an example of a LIMITING FACTOR?

• too many autotrophs

• a field of producers

• wildfires

• large streams and rivers

Tags

NGSS.MS-LS2-1

How do density-dependent factors differ from density-independent factors in their impact on population size?

• Density-dependent factors vary with population size, whereas density-independent factors do not.

• Density-independent factors vary with population size, whereas density-dependent factors do not.

• Both density-dependent and density-independent factors vary with population size.

• Neither density-dependent nor density-independent factors vary with population size.

What does density mean in an ecosystem?

• The number of different species in an ecosystem

• The number of individuals in a specific area

• The total biomass of an ecosystem

• The variety of habitats in an ecosystem