Energy Flow Through Living Systems

In photosynthesis, plants convert what type of energy into what other type of energy?

• Light energy into mechanical energy

• Radiant energy into chemical energy

• Chemical energy into heat energy

• Mechanical energy into light energy

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NGSS.MS-LS1-6

The chart lists organisms in 5 different categories living near the Texas Gulf Coast. (Look at your chart) Based on the chart which food chain best models a flow of energy in this ecosystem?

• Sun - Mosquitos - Shrimp - Coyotes

• Sun - Algae - Shrimp - Red Drum

• Sun - Pygmy sunfish - Shrimp - Wood ducks

• Sun - Willow Oaks - Algae - River otters

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

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-LS2-3

A student researching a northern forest ecosystem learns the following information about feeding relationships in the ecosystem.

(Look at your picture)

Which food web best represents the flow of energy in these feeding relationships?

• 
• 
• 
• 

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

The approximate amount of energy lost as heat as energy is passed to the next trophic level?

• 10%

• 40%

• 50%

• 90%

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

How much energy will be available to the tertiary consumer in the food pyramid?

• 10 kJ

• 1000 kJ

• 100 kJ

• 10000 kJ

Answer explanation

Each level only gets 10% of the energy from the level before it, so drop a 0 as you go to the next level.

Tags

NGSS.MS-LS2-3

Which supports the 10% energy rule?

• Waste is broken down by decomposers and recycled through the ecosystem

• Fewer organisms are at the top of the chain because there is less energy to sustain life at the top

• Not all organisms at the lower trophic levels will be eaten

• Only 10% of organisms are consumed because you can't digest the other molecules10

Tags

NGSS.MS-LS2-3

What is an organism that consumes another organism for nutrients?

• heterotroph

• decomposer

• autotroph

• detritivore

Tags

NGSS.MS-LS2-3

Match the following

• Photosynthesis

• adds carbon to the biosphere

• Both Photosynthesis and Chemosynthesis

• Uses energy from volcanic vents to create food

• Chemosynthesis

• Uses light energy to create food

Tags

NGSS.MS-LS1-6

Which of these correctly describes a relationship between organisms in the soil food web below?

• Protozoa gets nutrients from small arthropods.

• Mammals are predators of birds.

• Nematodes prey on arthropods.

• Bacteria get nutrients from organic matter.

Tags

NGSS.MS-LS2-2