Katia and Dejon want to plant some new trees in the forest to add more producers to the ecosystem. They do some experiments to find out what the new trees would need to grow. Katia knows that plants are producers and predicts that most of the material they use to grow will come from the soil. To test her prediction, she plants seeds from two different types of trees. She plants each seed in its own container of 250 grams (g) of soil. She places the containers in sunshine and waters them until they grow into healthy plants. Based on the data Katia collected, is the soil the main source of matter and energy for the plants?

No, the increase in plant mass is much larger than the decrease in soil mass.

Yes, there is an increase in plant mass and a decrease in soil mass.

Yes, there is no other source of matter and energy, so it must come from the soil.

There is not enough data to determine whether her prediction is correct or not.

This diagram shows the flow of matter and energy between producers, consumers, and decomposers. Decomposers can help your school garden grow. Which activity would make use of decomposers in the garden?

collecting food scraps from the lunchroom to add to the soil in the garden

collecting ripe fruit to eat in the school lunchroom

raking up dead leaves to be picked up by city trucks

adding plant food to the garden to ensure strong, healthy plants

A science teacher has grown an indoor garden for several years. Each year, students carefully water the plants, add plant food, make sure the garden gets plenty of sunshine, and remove any dead leaves or stems. This year, students have decided to care for the garden in all the same ways, except they have stopped using plant food. Instead, they rely on the decomposition of the dead leaves and stems to supply nutrients to the plants. However, their garden does not grow this year. Which explanation supports this result?

The soil does not have enough nutrients because there is no longer enough matter for the decomposers to break down.

The dead leaves and stems are too big and need to be chopped up into smaller pieces.

The plants have become accustomed to plant food, and now they cannot use the nutrients from the dead leaves and stems.

The dead leaves and stems are preventing the sunshine from reaching the soil, which is keeping the plants from growing.

Sonya builds a terrarium with different kinds of plants inside. She adds some crickets to the terrarium, too. Sonya wants to show how matter cycles within the terrarium. Which of the following actions could she take to show this? Choose 2 answers.

Sonya could add worms and fungi to the terrarium. If a plant in the terrarium dies, these decomposers can recycle some materials back into the soil for the other plants to use.

Sonya could add a lizard to the terrarium. The lizard may eat the crickets and leave droppings on the ground that will be absorbed back into the soil.

Sonya could remove all of the larger plants in the terrarium. She could plant them in a larger pot so that all the plants have enough space to grow.

Sonya could add plant food to the terrarium. The plant food will provide nutrients to the soil to help the plants grow taller faster.

The matter in an ecosystem is constantly being used and reused by living organisms. Three of these statements describe matter flowing through an ecosystem. Which statement does not describe the flow of matter through an ecosystem?

Rainfall washes dirt to the bottom of a hillside.

Humans release carbon dioxide when they breathe that plants then absorb from the air.

Decomposers break down dead animals into nutrients that plants can later use

Consumers eat smaller animals and then leave droppings on the ground.

Use the diagram to answer the question. An area has a large decrease in the deer population. How might this impact the ecosystem?

There could be less food for cougars to eat, which would cause a decrease in their population.

The rabbit population could increase because the cougars now only eat rabbits.

The population of mice could decrease, causing the snake population to decrease.

There could be an increase in both the cougar and snake populations because more grass will be available.

A student made the table below. He recorded what he thought some of the organisms in the forest ecosystem eat. Which diets are listed correctly based on the forest food web?

Mice, foxes, owls, and mushrooms

Hawks eat mice and birds. If hawks come into the forest area, what will happen in the food web? Choose 2 answers.

The population of mice will decrease.

The population of foxes may decrease.

There will be fewer plants consumed.

The population of owls will increase.

The population of grasshoppers will decrease.

What is the primary role of producers in an ecosystem?

To produce energy through photosynthesis

Which of the following best describes an ecosystem?

A community of organisms interacting with each other and their physical environment

A group of the same species living in a specific area

A collection of different species living in the same habitat

A single species interacting with its environment

How does energy flow through an ecosystem?

Energy flows in a one-way stream from producers to consumers

Energy is recycled by decomposers

Energy flows in a circular pattern

Energy is lost and gained equally

What is the impact of removing a top predator from an ecosystem?

Increased population of prey species

Decreased population of prey species

Which of the following is an example of a mutualistic relationship in an ecosystem?

A bird eating insects off a buffalo

What is the significance of biodiversity in an ecosystem?

It increases the stability and resilience of the ecosystem

It decreases the resilience of the ecosystem

It has no impact on the ecosystem

It leads to the extinction of species

Amplify Ecosystems

Authored by Lisa Thompson

Science

5th Grade

NGSS covered

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25 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

The figure shows an ecosystem with different plants and animals. What statement can you make about the flow of energy in this ecosystem?

On a cloudy day, no energy will flow in this ecosystem.

Grass can use and store energy from the sun, which eventually flows to all of the other life forms.

Eagles eat snakes, rabbits, and frogs and are not affected by the energy in other parts of the ecosystem.

If eagles are removed from the ecosystem, energy can no longer flow to any of the other animals.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which statement is true about changes that could be made to this food web?

If producers are removed, consumers and decomposers will continue to maintain a cycle.

If consumers are removed, producers and decomposers will continue to maintain a cycle.

If decomposers are removed, producers and consumers will continue to maintain a cycle.

If the sun is removed, producers, consumers, and decomposers will continue to maintain a cycle.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Study the food web. What belongs in the box?

apex predator, because it is at the end of the food web

producer, because it can use and store energy from the sun

consumer, because it can eat the mice

bacteria, because it can take nutrients from decomposing material

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the organisms in the food web are a source of matter and energy for the decomposers?

owls

deer

plants

birds

all of the above

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Deserts, mountains, and rivers are all examples of ________.

vacation spots

tundra

ecosystems

wetlands

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-LS2-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Identify the ecosystem

Forest

Tundra

Freshwater

Grassland

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What type of ecosystem is this?

wetland

ocean

grassland

forest

Tags

NGSS.MS-LS2-1

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Amplify Ecosystems

The figure shows an ecosystem with different plants and animals. What statement can you make about the flow of energy in this ecosystem?

Which statement is true about changes that could be made to this food web?

Study the food web. What belongs in the box?

Which of the organisms in the food web are a source of matter and energy for the decomposers?

Deserts, mountains, and rivers are all examples of ________.

Identify the ecosystem

What type of ecosystem is this?

What type of ecosystem is this?

Identify the ecosystem

Label the ecosystem

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