Energy Flow (STAAR thru 2021)

Fox squirrels are common in Texas. Fox squirrels primarily eat acorns and nuts from trees but also eat insects. Some predators of fox squirrels include owls, snakes and bobcats. Which diagram best represents how energy would flow to and from the fox squirrel?

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NGSS.MS-LS2-3

The chart lists organisms in five different categories living near the Texas Gulf Coast. Based on the chart, which food chain best models the flow of energy in this ecosystem?

• sun --> mosquitoes --> shrimp --> coyotes

• sun --> algae --> shrimp --> red drum

• sun --> pygmy sunfish --> shrimp --> wood ducks

• sun --> willow oaks --> algae --> river otters

Tags

NGSS.MS-LS2-3

A partial grassland food web is shown. Which of the following best describes a relationship in this grassland?

• Badgers are top predators because they eat upland sandpipers and beetles.

• A producer-consumer relationship exists between lupines and ants.

• A predator-prey relationship exists between beetles and ground squirrels.

• Upland sandpipers are primary and secondary consumers because they eat grasses and grasshoppers.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

An energy pyramid is shown. Which sentence best describes how energy flows through this pyramid?

• Energy is transferred down each level of the energy pyramid.

• The energy lost at each level is consumed by organisms in the top level.

• Energy is transferred from organisms in one level to those in the level above.

• The organisms at the bottom level provide energy directly to organisms in all the other levels.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A partial mountain forest food web is shown. Which statement does NOT describe a relationship shown in the food web?

• Elk are prey for mountain lions

• Mice are herbivores that consume grasses and are preyed on by snakes

• Owls prey on rabbits and frogs

• Rabbits consume shrubs and are parasites of grasses

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

A partial marine food web is shown. Which organisms all consume the same producer?

• crabs, pilchards, blennies

• Euphausiids, sweeps, water fleas

• tiger sharks, dolphins, octopuses

• sea urchins, crabs, octopuses

Tags

NGSS.MS-LS2-1

A partial food web is shown. The numbers in the boxes represent animals in the food web. Which organisms have three carnivorous predators and a consumer-producer relationship with at least on organism?

• The organisms that fit in boxes 2, 3 and 7

• The organisms that fit in boxes 5 and 7

• The organisms that fit in boxes 4 and 6

• The organisms that fit in boxes 2 and 7 only

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

A student researching a northern forest ecosystem learns the following information about feeding relationships in the ecosystem. Which food web best represents the flow of energy in these feeding relationships?

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Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

The partial food web shown below is found in an aquatic environment. This type of environment has many organisms in the same trophic levels. Which two types of organisms in this aquatic food web have a producer-consumer relationship?

• microscopic algae and white suckers

• small invertebrates and amphipods

• phytoplankton and mummichogs

• amphipods and channel catfish

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Some students are studying the relationships between organisms in a food web. How many predators shown in this food web are omnivores? Enter only the number.