Movement of Matter - 5th Grade Science

Card 0 of 20

Question

What is a decomposer in the food chain?

Answer

A decomposer is an organism that breaks down organic material. This includes the remains of dead organisms. Bacteria, worms, snails, slugs, and fungi are types of decomposers. All organisms undergo decomposition after death.

Compare your answer with the correct one above

Question

Screen shot 2020 06 25 at 2.49.38 pm

What is the role of a decomposer in an ecosystem?

Answer

A decomposer is an organism that feeds on and breaks down dead plant or animal matter, making organic nutrients available to the ecosystem. Often a decomposer is a bacterium, fungus, or invertebrate. Decomposers play a critical role in the flow of energy through an ecosystem. Decomposers make vital nutrients available to an ecosystem’s primary producers—usually plants and algae.

Compare your answer with the correct one above

Question

Screen shot 2020 06 25 at 2.49.38 pm

What would happen in a food chain if decomposers were removed?

Answer

If decomposers were removed from a food chain, there would be a break down in the flow of matter and energy. Waste and dead organisms would pile up. Producers would not have enough nutrients because, within the waste and dead organisms, nutrients would not be released back into the ecosystem.

Compare your answer with the correct one above

Question

If Jessa is making a model of a food chain and needs to include decomposers, what type of organism could she use as an example?

Answer

A decomposer is an organism that feeds on and breaks down dead plant or animal matter, making organic nutrients available to the ecosystem. Often a decomposer is a bacterium, fungus, or invertebrate. Decomposers play a critical role in the flow of energy through an ecosystem. Decomposers make vital nutrients available to an ecosystem’s primary producers—usually plants and algae. A worm, bacterium, or fungi would all be acceptable examples of a decomposer.

Compare your answer with the correct one above

Question

How do decomposers assist producers in moving matter in the food chain?

Answer

Decomposers play a vital role in keeping the food chain functioning properly. As decomposers break down the remains of dead organisms and produce waste, nutrients are recycled back into the soil for producers (plants) to absorb through their roots. Without decomposers, there would be a buildup of debris, remained, and a lack of nutrients in the food chain.

Compare your answer with the correct one above

Question

Organisms that feed on the remains or waste of other organisms are known as ___________.

Answer

A decomposer is an organism that feeds on and breaks down dead plant or animal matter, making organic nutrients available to the ecosystem. Often a decomposer is a bacterium, fungus, or invertebrate. Decomposers play a critical role in the flow of energy through an ecosystem. Decomposers make vital nutrients available to an ecosystem’s primary producers—usually plants and algae.

Compare your answer with the correct one above

Question

Which organism below is an example of a decomposer?

Answer

Fungi is a decomposer. Decomposers play a vital role in keeping the food chain functioning properly. As decomposers break down the remains of dead organisms and produce waste, nutrients are recycled back into the soil for producers (plants) to absorb through their roots. Without decomposers, there would be a buildup of debris, remained, and a lack of nutrients in the food chain.

Compare your answer with the correct one above

Question

Composting takes advantage of the natural process of decomposition by

Answer

Composting is a form of decomposition and takes advantage of the natural bacteria, fungi, and organisms that break down waste. Many people will collect kitchen scraps and debris, let the organic matter break down, and then spread it in gardens or potted plants because it is rich in nutrients. Decomposers play a vital role in keeping the food chain functioning properly. As decomposers break down the remains of dead organisms and produce waste, nutrients are recycled back into the soil for producers (plants) to absorb through their roots. Without decomposers, a buildup of debris remained and a lack of nutrients in the food chain.

Compare your answer with the correct one above

Question

In the graphic below, a food chain is modeled. The decomposer has been removed from the food chain. Which organism below could be the decomposer in this food chain?

Screen shot 2020 09 23 at 9.07.24 am

Answer

The vulture is a decomposer that could be added to this food chain to complete it. A decomposer is an organism that feeds on and breaks down dead plant or animal matter, making organic nutrients available to the ecosystem. Often a decomposer is a bacterium, fungus, or invertebrate. Decomposers play a critical role in the flow of energy through an ecosystem. Decomposers make vital nutrients available to an ecosystem’s primary producers—usually plants and algae.

Compare your answer with the correct one above

Question

Which of the following is an example of a 1) decomposer, 2) producer, and 3) a consumer?

Answer

A decomposer is an organism that breaks down organic material. This includes the remains of dead organisms. Bacteria, worms, snails, slugs, and fungi are types of decomposers. All organisms undergo decomposition after death. The correct answer is "1) fungi, 2) grass, and 3) cricket".

Compare your answer with the correct one above

Question

How is energy transformed and transferred as it flows through the food chain? (A graphic of a food chain is provided below.)

Screen shot 2020 06 26 at 3.50.53 pm

Answer

The Department of Education and Training for Victoria State in Canada explains in scientific terms how energy is transformed and transferred through the food chain in a very clear way, "Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants. A small proportion of this chemical energy is transformed directly into heat when compounds are broken down during respiration in plants. The majority of the chemical energy stored in plants is transformed into other forms by an assortment of consumers, such as cows, rabbits, horses, sheep, caterpillars, and other insects eating plants. Some of the stored chemical energy in a producer such as grass is stored as chemical energy in the fat or protein in the first-order consumers that eat the grass. This energy is available for higher-order consumers. At each stage of a food chain, most of the chemical energy is converted to other forms such as heat and does not remain within the ecosystem."

Source: https://www.education.vic.gov.au/school/teachers/teachingresources/discipline/science/continuum/Pages/ecosystem.aspx#:~:text=Energy%20is%20transferred%20between%20organisms,process%20of%20photosynthesis%20in%20plants.

Compare your answer with the correct one above

Question

How does energy flow within an ecosystem? (A graphic of a food chain is provided below.)

Screen shot 2020 06 29 at 12.33.33 pm

Answer

The Department of Education and Training for Victoria State in Canada explains in scientific terms how energy is transferred through the food chain in an ecosystem, "Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants. A small proportion of this chemical energy is transformed directly into heat when compounds are broken down during respiration in plants. The majority of the chemical energy stored in plants is transformed into other forms by an assortment of consumers, such as cows, rabbits, horses, sheep, caterpillars, and other insects eating plants. Some of the stored chemical energy in a producer such as grass is stored as chemical energy in the fat or protein in the first-order consumers that eat the grass. This energy is available for higher-order consumers. At each stage of a food chain, most of the chemical energy is converted to other forms such as heat and does not remain within the ecosystem."

Energy is recycled in a food chain and flows between producers, consumers, and decomposers. There is no accumulation of energy; a final consumer does not end up with all the energy; it is recycled and transferred through prey/predator relationships.

Source: https://www.education.vic.gov.au/school/teachers/teachingresources/discipline/science/continuum/Pages/ecosystem.aspx#:~:text=Energy%20is%20transferred%20between%20organisms,process%20of%20photosynthesis%20in%20plants.

Compare your answer with the correct one above

Question

Which list shows a possible order in which energy moves through an ecosystem if building a model?

Answer

The Department of Education and Training for Victoria State in Canada explains in scientific terms how energy is transferred through an ecosystem, "Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants. A small proportion of this chemical energy is transformed directly into heat when compounds are broken down during respiration in plants. The majority of the chemical energy stored in plants is transformed into other forms by an assortment of consumers, such as cows, rabbits, horses, sheep, caterpillars, and other insects eating plants. Some of the stored chemical energy in a producer such as grass is stored as chemical energy in the fat or protein in the first-order consumers that eat the grass. This energy is available for higher-order consumers. At each stage of a food chain, most of the chemical energy is converted to other forms such as heat and does not remain within the ecosystem."

An example of a food chain is presented in the graphic below. It starts with the Sun providing the energy needed for the producer's photosynthesis. The plant is eaten by an herbivore, which is consumed by a carnivore (and there may be a few carnivores in the chain), and finally, the waste and remains for dead organisms are broken down by decomposers to be put back into the ecosystem.

Screen shot 2020 06 26 at 3.50.53 pm

Source: https://www.education.vic.gov.au/school/teachers/teachingresources/discipline/science/continuum/Pages/ecosystem.aspx#:~:text=Energy%20is%20transferred%20between%20organisms,process%20of%20photosynthesis%20in%20plants.

Compare your answer with the correct one above

Question

What is the original source of almost all the energy in most ecosystems?

Answer

The Department of Education and Training for Victoria State in Canada explains in scientific terms how energy is transferred through the food chain when all the necessary organisms are present, "Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the Sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants. A small proportion of this chemical energy is transformed directly into heat when compounds are broken down during respiration in plants." Plants (producers) rely on sunlight to carry out photosynthesis. Though herbivores and carnivores do not get their energy directly from the Sun, they still rely on the plants (producers) who do and that energy is passed through the food chain.

Source: https://www.education.vic.gov.au/school/teachers/teachingresources/discipline/science/continuum/Pages/ecosystem.aspx#:~:text=Energy%20is%20transferred%20between%20organisms,process%20of%20photosynthesis%20in%20plants.

Compare your answer with the correct one above

Question

In the model below, why are all of the arrows pointing to the mushrooms?

Screen shot 2020 06 29 at 3.07.02 pm

Answer

Each arrow represents the direction energy is flowing. Energy moves to the mushrooms because they are decomposers, and they break down the remains of dead organisms. They distribute waste and nutrients back into the food chain through soil absorption.

Compare your answer with the correct one above

Question

In 1859, a farmer brought 24 rabbits to Australia. There were many green plants for the rabbits to eat. The rabbits grew strong and reproduced rapidly. By 1950, Australia had 600 million rabbits! Unfortunately, the rabbits damaged the ecosystem. After that one-hundred-year period, there were no green plants left. Scientists decided to try to lower the number of rabbits by releasing a disease into their environment. The disease killed many of the rabbits. But the dead rabbits created problems for the environment. There were many dead rabbits, but eventually, decomposers cleaned them up.

Why were there no green plants left in the 1950s?

Answer

Energy is transferred throughout the environment by consuming plants and animals, photosynthesis, and the breaking down of dead organisms. In this environment, a new consumer was introduced - the rabbit. They ate all of the producers (plants) in the area because they are herbivores. The plants could not keep up with their reproduction and were wiped out because of the large rabbit population and the number of plants needed to sustain them. The farmer would have to supplement the rabbits with other plant or plant by-products to keep his rabbit population growing.

Compare your answer with the correct one above

Question

In 1859, a farmer brought 24 rabbits to Australia. There were many green plants for the rabbits to eat. The rabbits grew strong and reproduced rapidly. By 1950, Australia had 600 million rabbits! Unfortunately, the rabbits damaged the ecosystem. After that one-hundred-year period, there were no green plants left. Scientists decided to try to lower the number of rabbits by releasing a disease into their environment. The disease killed many of the rabbits. But the dead rabbits created problems for the environment. There were many dead rabbits, but eventually, decomposers cleaned them up.

What is a possible problem with introducing a disease into the rabbit population?

Answer

The answer choices are correct and list possible problems with introducing a disease into the rabbit population. With 600 million rabbits, it is possible that the decomposers cannot keep up with the number of dead rabbits. If there are too many rabbits dying and the decomposers can't keep up, it could lead to carcasses building up, which can introduce new disease, and it will look and smell bad. Decomposers break down the waste and dead organisms, and they could catch the same illness or become sickly because of eating the sick rabbits. Over time organisms build up immunities to disease, and the condition can mutate. Over time, the infection could spread to other animals or mutate, and new symptoms emerge with the rabbits.

Compare your answer with the correct one above

Question

In 1859, a farmer brought 24 rabbits to Australia. There were many green plants for the rabbits to eat. The rabbits grew strong and reproduced rapidly. By 1950, Australia had 600 million rabbits! Unfortunately, the rabbits damaged the ecosystem. After that one-hundred-year period, there were no green plants left. Scientists decided to try to lower the number of rabbits by releasing a disease into their environment. The disease killed many of the rabbits. But the dead rabbits created problems for the environment. There were many dead rabbits, but eventually, decomposers cleaned them up.

How do the decomposers make the environment stronger?

Answer

Energy flows to the decomposers as they break down the remains of dead organisms. They distribute waste and nutrients back into the food chain through soil absorption. When the decomposers dispose of a carcass, they are absorbing energy to sustain themselves, but they are also returning it to the Earth for other organisms to use.

Compare your answer with the correct one above

Question

Which role(s) is necessary to include in a model of a food chain?

Answer

Organisms are dependent on each other for a source of energy. Producers rely on the Sun, consumers rely on producers and smaller prey earlier in the chain, and final consumers need weaker animals to feed on. Decomposers rely on the waste and carcasses of dead consumers, and they return nutrients to the soil. Each organism has a role to play, and the others will not survive if one link in the chain goes missing.

Compare your answer with the correct one above

Question

In the graphic below, why are multiple arrows pointing at the mushrooms?

Screen shot 2020 09 24 at 9.35.42 am

Answer

The mushrooms represent the decomposer that breaks down waste from animal and plant remains. Multiple arrows point to the mushrooms because they receive energy from all organisms once they have died.

Compare your answer with the correct one above

Tap the card to reveal the answer