Food Chains and Food Webs

In the food chain:

grass > grasshopper > frog > snake

what organism is the producer?

• grass

• grasshopper

• frog

• snake

Tags

NGSS.MS-LS2-3

Which organisms within this ecosystem contain the most energy?

• Cacti and Sagebrush

• Tarantulas and Snakes

• Snakes and Rats

• Hawks and Coyotes

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What do the arrows indicate in a food chain?

• The arrows show the direction in which heat flows

• The arrows show the predator-prey relationships within an ecosystem

• The arrows show what the organisms eats

• The arrows show the direction in which energy flows

Tags

NGSS.MS-LS2-3

An energy pyramid depicts an ecosystem's trophic levels.

Why is the bottom trophic level of an energy pyramid typically larger than the top trophic level?

• Producers contain the greatest amount of energy in comparison to the other trophic levels.

• Primary consumers have the greatest amount of energy in comparison to the other trophic levels

• There are more herbivores in an ecosystem than any other trophic level

• There are more secondary consumers in an ecosystem than any other trophic level

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A food chain is shown.

Which sentence best describes how energy flows through this food chain?

• The soil bacteria transforms chemical energy into radiant energy

• The grass transforms radiant energy into chemical energy

• The energy from each organism is lost in the soil bacteria

• The prairie dog receives its energy from the coyote

Tags

NGSS.MS-LS2-3

Which answer best describe the Orca/Killer Whale in its food web?

• The Orca is an apex predator

• The Orca is a secondary consumer

• The Orca is a carnivore

• All of the above

When organisms die, the organic matter in their cells and tissues can be consumed by mushrooms, bacteria, and worms for their energy.

What type of organisms are the mushroom, bacteria, and worms?

• Primary Consumers

• Decomposers

• Producers

• Herbivores

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Mushrooms are decomposers for most North Texas food chains.

Which description best describes how mushrooms would be incorporated into the food chain?

• All of the tertiary consumers will have an arrow pointing at the mushrooms because tertiary consumers are at the top of the food chain and transfer their energy to the decomposers

• All of the producers will have an arrow pointing at the mushrooms because decomposers receive their energy only from producers

• All of the organisms will have an arrow pointing at the mushrooms because decomposers receive their energy from all living things

• An arrow will point from the mushrooms to the primary consumers because primary consumers are herbivores and eat mushrooms for energy

Tags

NGSS.MS-LS2-3

How will a large decrease in the number of rats impact the food web shown above?

• There will be an increase in the number of ants, tarantulas, and snakes

• There will be an increase in the number of snakes, coyotes, and hawks

• There will be a decrease in the number of snakes, coyotes, and hawks

• There will be a decrease in the number of cacti and sagebrush plants

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Analyze the positions of the eagle and the snake in the food web pictured above.

Which of the following statements is correct?

• The eagle eats more types of organisms in the food web than the snake does

• The eagle eats the same types of organisms as the snake does

• The snake eats more types of organisms in the food web than the eagle does

• The snake is eaten by the same types of organisms as the eagle is

Tags

NGSS.MS-LS2-2