Unit 1 Ecology Test – Worksheet Questions

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

• A tick and bison being in a parasitic relationship

• Human exponential growth

• Herd of elk emigrating

• All of the above

Which material is recycled in an ecosystem?

• energy

• matter

• sunlight

• organisms

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

The ultimate source of energy for most food chains is ____________.

• the sun

• bacteria

• cellular respiration

• producers

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Why is the Nitrogen Cycle important?

• It helps regulate the Earth's temperature.

• It prevents soil erosion by enhancing root development.

• Nitrogen is a key component of DNA, proteins, and other essential molecules.

• Plants need nitrogen to make oxygen.

Tags

NGSS.MS-LS2-3

What happens to energy as it moves through a food web?

• It increases.

• It decreases.

• It remains the same.

• It depends on the abiotic factors in the ecosystem.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Where does 90% of the energy in a trophic level end up?

• Lost as heat

• Used for cellular respiration.

• Used in cell growth and reproduction

• All of these.

Tags

NGSS.MS-LS2-3

Which of the following explains how carbon dioxide is released back into the atmosphere?

• As producers take it into their leaves.

• When organisms (such as animals) exhale.

• When a primary consumer eats a secondary consumer.

• When a secondary consumer eats a primary consumer.

What is the primary role of plants in the carbon cycle?

• Plants absorb carbon dioxide from the atmosphere and use it to create sugars.

• Plants release carbon dioxide into the atmosphere through respiration.

• Plants convert nitrogen gas so nitrogen is in a useable form.

• Plants break down fossil fuels and release carbon dioxide into the atmosphere.

Tags

NGSS.MS-LS1-6

Which of the following would INCREASE the carrying capacity of an ecosystem?

• flood

• disease

• more available food

• forest fire

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An increase in which factor below can cause a population to decrease?

• Natality rate

• Immigration

• Emigration

• All of these.