Ecosystem Lesson

Two species of fish live in the same pond. Which of the following would increase competition between these two species of fish?

• Habitat temperature increases.

• Population of birds that eat the fish increases.

• Number of food plants the fish eat increases.

• Water level in the pond decreases.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following lists contains only abiotic factors?

• water, air, temperature

• grass, air, people

• trees, fish, polar bears

• grass, water, sand

A __________________ relationship is when a biotic or abiotic factor is needed by an a living thing to surive

• Dependent

• Competitive

Tags

NGSS.MS-LS2-1

Relationship is when two living things "fight" for limited resources.

• Dependent

• Competitive

Tags

NGSS.MS-LS2-1

This diagram shows the variety of organisms that live in different tide zones. Mussels are common organisms that compete for space in intertidal (middle) tide zones. If all of the mussels were removed from zone A, which organisms would likely compete for the space in Zone A?

• Periwinkle and Limpets

• Sea lettuce and Chiton

• Sea urchins and Hermit crabs

• Rock louse and Periwinkle

Tags

NGSS.MS-LS2-1

Animals from two different species utilize the same source of nutrition in one area. It is most accurate to say that the animals…

• will learn to get along

• will compete for food

• will die because there will not be enough food for both of them

• will learn to eat different foods

Tags

NGSS.MS-LS2-1

What will happen if a factor that a species is dependent on decreases?

• The species will also decrease

• The species will increase

• nothing

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Organism X feeds mainly on small fish, amphibians, and reptiles. With which organism is organism X most likely to compete?

• Great blue heron

• Mallard

• Pied-billed grebe

• Great egret

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

Hawks and owls eat the same type of food and struggle with one another to get their food. What is this an example of?

• Competition

• Biotic factor

• Symbiosis

• Population

Tags

NGSS.MS-LS2-2

What is the primary source of energy for most ecosystems?

• A) Water

• B) Sunlight

• C) Wind

• D) Soil nutrients

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3