TEK 13B*

What is a food web?

• A single pathway of feeding relationships.

• An interconnected map of multiple feeding relationships.

• A diagram showing only predator-prey interactions.

• A list of animals found in an ecosystem.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

How many food chains are contained within the marine food web depicted in the image?

• 5

• 6

• 7

• 8

Which organism is the tertiary consumer in the food chain starting with algae in the marine food web provided?

• Krill

• Leopard seal

• Adélie penguin

• Killer whale

Tags

NGSS.MS-LS2-3

What do the arrows depicted in food chains or food webs represent?

• The size of each organism

• The direction in which animals move

• The flow of energy between organisms

• The lifespan of the organisms

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which important factor is missing from the food web in the image, and what role does it play in ecosystems?

• Predators, which control the population of other species

• Sunlight, which is the primary source of energy

• Decomposers, which recycle matter from decaying organisms back into the ecosystem

• Water, which is essential for all living organisms

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A significant oil spill has caused

a layer of oil to sit on the ocean’s

surface, blocking sunlight from

the following organisms: Krill, Crabeater seals, Killer whales

What is the cause of the decline in the krill population according to the information provided?

• Overfishing by humans

• A significant oil spill blocking sunlight

• Increase in krill predators

• Climate change affecting ocean temperatures

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is the effect of a decline in krill population on the crab eater seals?

• Increase due to more food availability

• No change, as they do not feed on krill

• Decline due to drop in krill population

• Migration to other areas with more krill

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is a primary consumer in a food chain?

• Sunflower seeds

• Mouse

• Hawk

• Weasel

Tags

NGSS.MS-LS2-3

Which organism is an example of a tertiary consumer?

• Frog

• Weasel

• Mouse

• Sunflower seeds

Tags

NGSS.MS-LS2-3

According to the ten percent law, how much energy is transferred from one trophic level to the next?

• Approximately 5%

• Approximately 10%

• Approximately 20%

• Approximately 50%

Tags

NGSS.MS-LS2-3