Energy Flow and Matter Cycling

Which of the following best describes the role of photosynthesis in the flow of energy within an ecosystem?

• It converts chemical energy into light energy.

• It converts light energy into chemical energy.

• It releases energy stored in glucose.

• It breaks down organic matter into simpler compounds.

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

In an ecosystem, which process is primarily responsible for the cycling of matter?

• Photosynthesis

• Respiration

• Decomposition

• Evaporation

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which of the following equations represents the process of photosynthesis?

Tags

NGSS.MS-LS1-6

What is the primary source of energy for most ecosystems on Earth?

• Chemical energy from the soil

• Heat energy from the Earth's core

• Light energy from the Sun

• Kinetic energy from wind

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which of the following best explains the role of decomposers in the cycling of matter?

• They convert solar energy into chemical energy.

• They break down dead organisms, returning nutrients to the soil.

• They produce oxygen through photosynthesis.

• They consume primary producers for energy.

Tags

NGSS.MS-LS2-3

In a food web, which organisms are typically at the base and provide energy for other organisms?

• Herbivores

• Carnivores

• Producers

• Decomposers

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which of the following processes releases carbon dioxide back into the atmosphere?

• Photosynthesis

• Respiration

• Nitrogen fixation

• Transpiration

How does energy flow through an ecosystem?

• In a circular pattern

• In a linear, one-way direction

• Randomly, without any specific direction

• In a zigzag pattern

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which of the following is a model that illustrates the flow of energy through an ecosystem?

• Food chain

• Water cycle

• Rock cycle

• Carbon cycle

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

What is the primary role of herbivores in an ecosystem?

• To decompose organic matter

• To produce energy from sunlight

• To consume plants and transfer energy to higher trophic levels

• To fix nitrogen in the soil

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2