Flow of Energy (SI)

The carbon that plants need for photosynthesis comes from

• carbon dioxide gas in the atmosphere.
• carbon molecules that the plant produces.
• carbon atoms from the breakdown of food.
• carbon molecules dissolved in water.

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NGSS.MS-LS1-6

Which of the following statements is supported by our understanding of energy flow through ecosystems?

• Matter and energy can change forms and locations in ecosystems.
• Matter can change forms, but only one kind of energy exists.
• Matter and energy must always remain in the same form and location.
• Energy can change forms, but only one kind of matter exists.

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

As an animal grows, its mass increases. The matter that makes up this new mass comes mostly from

• food that the animal has eaten and changed into other compounds.
• compounds that the animal breaks down into water and carbon dioxide.
• substances that the animal has eaten but cannot digest.
• air and water that the animal changes into other compounds using the energy from sunlight.

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NGSS.MS-LS1-7

A cow is an example of

• a heterotroph.
• a predator.
• an autotroph.
• a producer.

Within ecosystems, energy generally flows from

• primary consumers to secondary consumers.
• secondary consumers to primary consumers.
• primary consumers to producers.
• all of these

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NGSS.MS-LS2-3

Which of the following statements describes a food web?

• Energy flows from producers and consumers to decomposers.
• Energy flows from consumers to decomposers and from decomposers to consumers.
• Energy flows from producers, consumers, and decomposers to the Sun.
• Energy flows directly from the Sun to consumers.

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

An organism makes glucose using energy from the Sun. The organism is a _______.

• producer
• primary consumer
• secondary consumer
• decomposer

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

The carbon cycle is a complex series of processes through which all of the carbon atoms on Earth move through the planet's organisms, atmosphere, ocean, and solid rock. As demonstrated by the carbon cycle, matter on Earth is generally

• recycled continually through the spheres of the Earth.
• released into space once it reaches the atmosphere.
• absorbed into the Earth's core where it can no longer be used.
• created and destroyed by the basic life processes of organisms.

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NGSS.MS-LS2-3

NGSS.MS-ESS2-1

Why are there very few organisms toward the top of an energy pyramid?

• There is much less energy available at the top of the pyramid.

• Organisms at the top of the pyramid can only generate energy directly from the sun.

• Organisms at the top of the pyramid are preyed upon by many other organisms.

• There is too much energy available at the top of the pyramid.

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which level of an energy pyramid will be able to support the greatest number of organisms?

• producers
• secondary consumers
• primary consumers
• tertiary consumers

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NGSS.MS-LS2-3