#07 Independent Practice: Flow of Energy & Matter in Ecosystems

Approximately what percentage of original chemical energy produced by the phytoplankton would be present in the population of humpback whales?

• 10%

• 1%

• 0.1%

• 0.01%

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

If 10,000 kcal of energy are present in the grass population, approximately how much energy would be expected in the population of lions?

• 1,000 kcal

• 100 kcal

• 10 kcal

• 1 kcal

Tags

NGSS.MS-LS2-3

What role are bacteria most likely filling in this food chain?

(a)  

Tags

NGSS.MS-LS2-3

Which organism represents the trophic level containing approximately 10% of the initial amount of chemical energy produced by the plants in this food chain?

• Grass

• Insects

• Fish

• Bird

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

If there is 5,000 kg of biomass in the algae population, about how many kg of mass would be expected in the fish population?

• 500 kg

• 50 kg

• 5 kg

• 0.5 kg

Tags

NGSS.MS-LS2-3

Which of the following statements about the biomass of each trophic level is accurate based on the food chain shown above?

• The plant community has less biomass than the mosquito larvae population.

• The population of dragonfly larvae has more biomass than the beetle population.

• The beetle population has a lower biomass than the dragonfly larvae population.

• The population of beetles has more biomass than all other trophic levels.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What happens to most of the energy that is not passed from one trophic level to the next?

• It is returned to the plant population

• It is used to convert CO₂ into sugars

• It is lost to the environment as heat

• It transforms into X-ray radiation

Tags

NGSS.MS-LS2-3

Why does the amount of matter decrease with each trophic level?

• It is directly tied to the available energy

• It is lost to the environment as heat

• The matter is converted into energy

• It is converted into glucose and oxygen

Tags

NGSS.MS-LS2-3

If 50 kg of mass are present in the tomato plants, approximately how much mass would be expected in the spider population?

• 50 kg

• 5 kg

• 0.5 kg

• 0.05 kg

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Approximately what percentage of original chemical energy produced by the tomato plants would be present in the aphid population?

• 0.1%

• 1%

• 10%

• 100%

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6