Explain how energy flows from the Sun to a carnivore in a food chain.

Sun → Plant → Herbivore → Carnivore

Sun → Carnivore → Herbivore → Plant

Sun → Decomposer → Plant → Carnivore

Sun → Plant → Decomposer → Carnivore

Which statement best explains why plants are considered producers in an ecosystem?

They make their own food using sunlight.

They consume other organisms for energy.

How does cellular respiration contribute to the cycling of matter in living organisms?

It breaks down glucose, releasing carbon dioxide and water.

It produces glucose from sunlight.

It absorbs nutrients from the soil.

It stores energy in the form of fat.

Which of the following best describes the relationship between photosynthesis and cellular respiration?

Photosynthesis stores energy, while cellular respiration releases it.

Both processes use sunlight to make food.

Cellular respiration creates glucose, while photosynthesis breaks it down.

What happens to the matter in a dead animal after decomposers act on it?

It is broken down and returned to the soil and air.

It is converted into energy only.

It becomes part of living plants directly.

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

Energy flows in one direction from the Sun to producers to consumers.

Energy cycles endlessly between organisms.

Energy is created by decomposers.

Energy is stored in rocks and soil.

A student claims that plants and animals both use cellular respiration. Which evidence supports this claim?

Both plants and animals break down glucose to release energy.

Animals do not produce carbon dioxide.

Given a food web, how would removing all decomposers affect the cycling of matter?

Dead material would accumulate, and nutrients would not return to the soil.

Matter would continue to cycle as usual.

There would be more energy for consumers.

A plant is placed in a sealed container with only sunlight and water. Predict what will happen to the levels of oxygen and carbon dioxide inside the container over time.

Oxygen will increase, carbon dioxide will decrease.

Oxygen will decrease, carbon dioxide will increase.

A student models the process of photosynthesis and cellular respiration using colored beads to represent atoms. Which sequence of bead colors would best show the cycling of matter between these two processes?

Blue (Carbon) + Red (Oxygen) + Green (Hydrogen) → Glucose → Blue (Carbon) + Red (Oxygen) + Green (Hydrogen)

Red (Oxygen) → Blue (Carbon) → Green (Hydrogen) → Red (Oxygen)

Green (Hydrogen) → Blue (Carbon) → Red (Oxygen)

Red (Oxygen) → Green (Hydrogen) → Blue (Carbon)

A student observes that plants in a closed terrarium continue to grow. Which explanation best uses evidence to describe how matter and energy are cycled in this system?

Plants use sunlight to make food, and decomposers recycle nutrients from dead material.

Plants get energy from the soil, and animals provide oxygen.

Plants only need water to grow, and decomposers are not needed.

Plants use wind to move nutrients.

A student claims that energy is recycled in an ecosystem. Use evidence to support or refute this claim.

Energy is not recycled; it flows in one direction and is eventually lost as heat.

Energy is recycled because it is passed from one organism to another.

Energy is stored in the soil and reused.

Energy is created by decomposers and reused by producers.

Which evidence best supports the idea that photosynthesis is essential for the cycling of matter in ecosystems?

Plants convert carbon dioxide into glucose, which is used by other organisms.

Plants absorb water from the soil.

Animals eat other animals for energy.

Decomposers break down dead material.

A student is asked to develop a model showing how food is rearranged through chemical reactions in an organism. Which of the following best represents this process?

Food is broken down into smaller molecules, which are used to build new molecules for growth and energy.

Food is stored in the stomach and never changes.

Food is turned directly into energy without any changes.

Food is only used for movement.

Which scenario best demonstrates the flow of energy and cycling of matter in an ecosystem?

A plant absorbs sunlight, a rabbit eats the plant, a fox eats the rabbit, and decomposers break down the fox after it dies.

A rock sits in the sun and gets warm.

A tree falls and is buried underground forever.

Which of the following best describes the cycling of matter in an ecosystem?

Matter is constantly recycled between living and nonliving parts.

Matter moves in a one-way path.

Matter is only found in living things.

Matter is created by producers.

Which statement best explains how energy and matter move through a food web?

Energy flows in one direction, and matter cycles between organisms and the environment.

Energy cycles endlessly, but matter flows in one direction.

Both energy and matter flow in one direction.

Both energy and matter cycle endlessly.

What is the role of decomposers in an ecosystem?

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

They produce their own food through photosynthesis.

They consume other organisms for energy.

They are the primary consumers in a food chain.

How do atoms like oxygen, carbon, and nitrogen move through an ecosystem's living and nonliving parts?

They cycle through the ecosystem through living and nonliving things over and over.

They are only found in living things such as plants, animals and fungi.

They are only found in nonliving things such as air and water.

They are used only once then lost.

In the spring and summer plants grow many leaves and are able to increase the process of photosynthesis. What effect will this have? Choose all that are correct.

The amount of CO 2 in the atmosphere would decrease.

The amount of glucose made will increase.

The amount of oxygen in the atmosphere would increase.

The amount of CO 2 in the atmosphere would increase.

The amount of oxygen in the atmosphere would decrease.

In the spring/summer we tend to use lots of fertilizers on our lawn. When it rains, this fertilizer gets washed away into local rivers and lakes. What impact does this have on the water ecosystem?

The amount of nutrients in the water will increase.

The amount of nutrients in the water will decrease.

There will be no change in nutrients.

Resource Library

Science

Earth & Space Science

Cycles Of Matter

Cycles of Matter

Authored by Bryan Aue

Science

6th Grade

NGSS covered

Used 2+ times

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35 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which process in plants converts carbon dioxide and water into glucose and oxygen using sunlight?

Cellular respiration

Photosynthesis

Decomposition

Fermentation

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the main function of decomposers in an ecosystem?

Produce oxygen

Break down dead organisms

Absorb sunlight

Store energy

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is a product of cellular respiration?

Glucose

Oxygen

Carbon dioxide

Sunlight

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the primary source of energy for most ecosystems?

Water

Sunlight

Soil

Wind

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which molecule is formed during photosynthesis and used by plants for energy?

Glucose

Carbon dioxide

Water

Nitrogen

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which process releases energy by breaking down glucose in the presence of oxygen?

Photosynthesis

Cellular respiration

Decomposition

Transpiration

Tags

NGSS.HS-LS1-7

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

They create energy from sunlight.

They break down dead material, returning nutrients to the soil.

They produce glucose from carbon dioxide.

They absorb water from the soil.

Tags

NGSS.MS-LS2-3

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