Photosynthesis and Trophic Levels

What is the primary source of energy for nearly all ecosystems?

• Geothermal heat

• The Sun

• Wind

• Hydroelectric power

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which trophic level directly utilizes photosynthesis to produce energy?

• Primary consumers

• Secondary consumers

• Producers

• Decomposers

Tags

NGSS.MS-LS1-6

What type of organism breaks down dead material and recycles nutrients back into the ecosystem?

• Producers

• Primary consumers

• Secondary consumers

• Decomposers

Tags

NGSS.MS-LS2-3

In a food chain, what is the term for organisms that obtain energy by eating only plants?

• Carnivores

• Omnivores

• Herbivores

• Autotrophs

Which of the following best describes a food web?

• A linear sequence of who eats whom

• A complex network of feeding relationships

• A single pathway of energy flow

• A cyclic energy transfer process

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

What type of organism manufactures its own food using light or chemical energy?

• Heterotroph

• Autotroph

• Chemotroph

• Lithotroph

Tags

NGSS.MS-LS1-6

Which organisms are considered the primary consumers in a food chain?

• Plants

• Herbivores

• Carnivores

• Decomposers

Tags

NGSS.MS-LS2-2

What is the role of chemotrophs in an ecosystem?

• They decompose organic material.

• They consume other organisms.

• They produce food through chemical energy.

• They regulate the population of other species.

Tags

NGSS.MS-LS2-3

Which of the following is an example of a secondary consumer?

• A wolf eating a rabbit

• A cow eating grass

• A human eating a vegetable

• A mushroom decomposing a log

Tags

NGSS.MS-LS2-3

How does energy flow through an ecosystem?

• From producers to decomposers only

• From primary consumers to secondary consumers to tertiary consumers

• From producers to primary consumers to secondary consumers and then to tertiary consumers

• In a closed loop with no beginning or end

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3