Day 1

How do organisms in an ecosystem depend on biotic factors?

• They rely on sunlight for photosynthesis.

• They compete for food and mates.

• They depend on water for hydration.

• They use soil for shelter.

Tags

TEKS.SCI.6.12A

Which of the following is an abiotic factor that organisms in an ecosystem might compete for?

• Predators

• Light

• Prey

• Symbiotic partners

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TEKS.SCI.6.12A

What role does biodiversity play in the stability of an ecosystem?

• It decreases the number of species.

• It increases the vulnerability to diseases.

• It contributes to the stability and sustainability.

• It reduces the availability of resources.

Tags

TEKS.SCI.8.12C

How does biodiversity affect the health of organisms within an ecosystem?

• It limits the genetic variation.

• It enhances the resilience to environmental changes.

• It causes overpopulation of certain species.

• It reduces the food supply.

Tags

TEKS.SCI.8.12C

What happens to the available energy as it moves up the trophic levels in an energy pyramid?

• It increases.

• It remains constant.

• It decreases.

• It fluctuates randomly.

Tags

TEKS.SCI.7.12A

Which of the following best describes the flow of energy in an ecosystem?

• Energy is recycled back to the sun.

• Energy flows in a circular pattern.

• Energy flows in one direction from producers to consumers.

• Energy is created at each trophic level.

Tags

TEKS.SCI.7.12A

What is the primary source of energy for most ecosystems?

• Decomposers

• The sun

• Herbivores

• Carnivores

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TEKS.SCI.7.12A

How is energy transferred in an energy pyramid?

• Only about 10% of the energy moves from one trophic level to the next.

• Only about 90% of the energy moves from one trophic level to the next.

• 0% of the energy moves from one trophic level to the next.

• 100% of the energy moves from one trophic level to the next.

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TEKS.SCI.7.12A

1. An energy pyramid for an arctic ecosystem is shown.

2. If an arrow was added to the diagram to show the flow of energy, which direction would it be pointing?

• The arrow would point down from polar bear to seaweed; the available energy decreases as you move down trophic levels.

• The arrow would point up from seaweed to polar bear; the available energy increases as you move up trophic levels.

• The arrow would point up from seaweed to polar bear; the available energy decreases as you move up trophic levels.

• The arrow would point up and down between the seaweed and polar bear; the available energy stays the same as you move between trophic levels.

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TEKS.SCI.7.12A

The food web shows a forest ecosystem and the relationships between organisms in the ecosystem.

A disease is introduced and decreases the mouse population significantly. How will this change affect the squirrel population? Choose the BEST answer.

• The squirrel population will decrease because deer will rely on squirrels more as a food source.

• The squirrel population will increase because squirrels will have one less predator in the ecosystem.

• The squirrel population will decrease because hawks will rely on squirrels more as a food source.

• The squirrel population will increase because there will be more prey to choose from.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4