Flow of Energy & Matter in Ecosystems

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 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

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-LS2-4

NGSS.MS-LS2-1

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

Diagram that shows the energy available to each trophic level in an ecosystem; 10% is passed on to upper levels, the rest is lost as heat

• succession 
• cellular respiration
• energy pyramid
• biochemical cycle

Tags

NGSS.MS-LS2-3

Which organism would be at the bottom of the energy pyramid?

• tomatoes

• spiders

• aphids

• lady beetles

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

If 25,000 kcal of energy are available in the algae population, approximately how much energy would be in the bass population?

• 2.5 kcal

• 25 kcal

• 250 kcal

• 2,500 kcal

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

If 15 kcal of energy are available in the tertiary consumers, about how much energy was originally generated by the producers?

• 1,500 kcal

• 150 kcal

• 15 kcal

• 15,000 kcal

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

A partial Texas food web is shown.

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-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which of the animals in this food web is a secondary consumer?

• Hawk
• Lizard
• Mouse
• Snake

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2