Food webs & trophic levels finals review 12/17/25

An organism that helps to recycle nutrients within an ecosystem by eating dead or decaying organisms is a:

• Predator

• Autotroph

• Producer

• Decomposer

Tags

NGSS.MS-LS2-3

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.

• It shows how sunlight flows within an ecosystem.

• They show what direction the energy is flowing between organisms. 

• They represent how water is transferred within a habitat.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

The fox in this food web would be considered a:

• Tertiary Consumer
• Producer
• Secondary Consumer
• Primary Consumer

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

The populations of which organisms will most likely increase as a result of a disease that suddenly reduced the population of Texas horned lizards?

• Grasses and ants

• Ants and grasshoppers

• Grasshoppers and Texas Cottonmouths

• Texas cottonmouths and red shouldered hawks

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-1

What are plants called in a food chain?

• Producers /Autotrophs

• Consumers /Heterotrophs

• Decomposers

• Scavengers

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Where does the energy start in this food chain?

• Plant
• Sun
• Deer
• Wolf

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Why might an organism have more than one arrow coming FROM them in a food web?

• More than one organism may eat them.

• They may eat more than one other organism.

• This organism gets its energy from multiple sources.

Tags

NGSS.MS-LS2-2

What is missing from this food chain?
Grass > Grasshopper > Bird > Snake

• Producer
• Primary Consumer
• Secondary Consumer
• Decomposer

Tags

NGSS.MS-LS2-3

Match the following

• This is an organism that supplies matter and energy, also known as an autotroph.

• Parasite

• This is an animal that lives by preying on other animals.

• Decomposer

• This is an organism that breaks down and gains nutrients from dead organisms.

• Producer

• This is an organism that relies on other organisms for its food and energy supply; heterotroph

• Consumer

• This is an organism which feeds on, but usually does not kill, a larger organism

• Predator

Tags

NGSS.MS-LS2-2

What happens to the amount of available energy in the pyramid as it moves up through the different levels?

• it increases

• it decreases

• it remains the same

Tags

NGSS.MS-LS2-3