Skip to Content

Log in / Sign up

Q&A for How to Show Oxygen Is a By Product of Photosynthesis

Return to Full Article

Coming soon

Search

Add New Question

Question

Why is it important for plants to release oxygen as a byproduct?

Meredith Juncker, PhD
Scientific Researcher
Meredith Juncker is a scientific researcher based in Brookline, Massachusetts. Currently working as a Senior Patent Technology Specialist at Dana-Farber Cancer Institute, Meredith is able to leverage her expertise in biochemistry and molecular biology. She received a PhD in Biochemistry and Molecular Biology from Louisiana State University Health Sciences Center, focusing on proteins and neurodegenerative diseases. She went on to work as a Postdoctoral Associate at the Jacobs School of Medicine and Biomedical Sciences at the State University of New York at Buffalo.

Meredith Juncker, PhD

Scientific Researcher

Expert Answer

The oxygen byproduct of photosynthesis is utilized in another process in the plant: cellular respiration. This is how the plant generates energy, or ATP, to survive. If oxygen isn't released during photosynthesis, its counter process, cellular respiration, cannot occur, and there will be a lack of ATP generated and the plant will die.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 6 Helpful 16
Question

What happens when extra sodium bicarbonate is added?

Meredith Juncker, PhD
Scientific Researcher
Meredith Juncker is a scientific researcher based in Brookline, Massachusetts. Currently working as a Senior Patent Technology Specialist at Dana-Farber Cancer Institute, Meredith is able to leverage her expertise in biochemistry and molecular biology. She received a PhD in Biochemistry and Molecular Biology from Louisiana State University Health Sciences Center, focusing on proteins and neurodegenerative diseases. She went on to work as a Postdoctoral Associate at the Jacobs School of Medicine and Biomedical Sciences at the State University of New York at Buffalo.

Meredith Juncker, PhD

Scientific Researcher

Expert Answer

Sodium bicarbonate is the source of CO2 in this experiment, so adding more sodium bicarbonate would increase the amount of CO2 exposed to the plant for use in photosynthesis. With more CO2, the rate of oxygen bubble formation will increase since photosynthesis uses CO2 and water to produce glucose and oxygen.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 4 Helpful 12
Question

What are the dependent and independent variables of this experiment?

Meredith Juncker, PhD
Scientific Researcher
Meredith Juncker is a scientific researcher based in Brookline, Massachusetts. Currently working as a Senior Patent Technology Specialist at Dana-Farber Cancer Institute, Meredith is able to leverage her expertise in biochemistry and molecular biology. She received a PhD in Biochemistry and Molecular Biology from Louisiana State University Health Sciences Center, focusing on proteins and neurodegenerative diseases. She went on to work as a Postdoctoral Associate at the Jacobs School of Medicine and Biomedical Sciences at the State University of New York at Buffalo.

Meredith Juncker, PhD

Scientific Researcher

Expert Answer

The independent variable would be the light, and the dependent variable would be the oxygen produced (the amount of oxygen produced depends on the presence or absence of the light).

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 4 Helpful 15
Question

Why is the gas collected unlikely to be pure oxygen in this process?

Meredith Juncker, PhD
Scientific Researcher
Meredith Juncker is a scientific researcher based in Brookline, Massachusetts. Currently working as a Senior Patent Technology Specialist at Dana-Farber Cancer Institute, Meredith is able to leverage her expertise in biochemistry and molecular biology. She received a PhD in Biochemistry and Molecular Biology from Louisiana State University Health Sciences Center, focusing on proteins and neurodegenerative diseases. She went on to work as a Postdoctoral Associate at the Jacobs School of Medicine and Biomedical Sciences at the State University of New York at Buffalo.

Meredith Juncker, PhD

Scientific Researcher

Expert Answer

The water used is saturated with air, which is about 79% nitrogen gas and 21% oxygen gas. The water also contains an unnaturally high amount of carbon dioxide because of the sodium bicarbonate added. As the elodea produces oxygen in photosynthesis, some of the oxygen dissolves in the water and displaces nitrogen gas and carbon dioxide gas.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 4 Helpful 14
Question

Are there any precautions for this experiment?

Meredith Juncker, PhD
Scientific Researcher
Meredith Juncker is a scientific researcher based in Brookline, Massachusetts. Currently working as a Senior Patent Technology Specialist at Dana-Farber Cancer Institute, Meredith is able to leverage her expertise in biochemistry and molecular biology. She received a PhD in Biochemistry and Molecular Biology from Louisiana State University Health Sciences Center, focusing on proteins and neurodegenerative diseases. She went on to work as a Postdoctoral Associate at the Jacobs School of Medicine and Biomedical Sciences at the State University of New York at Buffalo.

Meredith Juncker, PhD

Scientific Researcher

Expert Answer

Yes, you should stay away from flammable items when you're lighting the match.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 9 Helpful 16
Question

What changes take place in the water level test tube when the air bubbles are released?

Meredith Juncker, PhD
Scientific Researcher
Meredith Juncker is a scientific researcher based in Brookline, Massachusetts. Currently working as a Senior Patent Technology Specialist at Dana-Farber Cancer Institute, Meredith is able to leverage her expertise in biochemistry and molecular biology. She received a PhD in Biochemistry and Molecular Biology from Louisiana State University Health Sciences Center, focusing on proteins and neurodegenerative diseases. She went on to work as a Postdoctoral Associate at the Jacobs School of Medicine and Biomedical Sciences at the State University of New York at Buffalo.

Meredith Juncker, PhD

Scientific Researcher

Expert Answer

The oxygen bubbles formed during photosynthesis displace water from the test tube, so the water level should appear lower than it was originally.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 6 Helpful 9
Question

Why do you use a water plant and not a terrestrial plant?

Community Answer

You use a water plant so you can see the gas produced. If you used a terrestrial plant, you would have to measure the amount of oxygen in the container, because the oxygen would mix with air in the container. (Grass cannot survive being submerged in water.)

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 6 Helpful 26
Question

What does it prove about photosynthesis?

Community Answer

Plants consume carbon dioxide and release oxygen as a waste product. It helped early life on Earth and continues to provide us with the oxygen we breathe. That's why it's so important to conserve our rain forests and the flora around us in general.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 12 Helpful 29
Question

What precautions do we take while removing the test tube from the beaker?

Community Answer

As you lift up the test tube, be sure to keep the mouth of the tube below the water's surface before placing your thumb over it tightly. The air pressure will keep the water contained. Be careful not to flip over the test tube before the match is ready, because the oxygen may escape between your thumb and the glass.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 5 Helpful 20
Question

Why should the level of water in the beaker be more than the length of the funnel's stem?

Community Answer

If the stem of the funnel sticks out above the water, there will be air introduced into the system before the experiment begins. Keeping the funnel submerged ensures that the only gas you see at the end of the experiment, is gas that was produced by the plant itself during the experiment.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 9 Helpful 23
Question

What can be used instead of test tubes?

Community Answer

Sadly, there is no perfect substitute for test tubes, as they often treat the test tubes with chemicals or temper them. Though using a shot-glass or glass cup may be cheaper, it's safer to just go out and buy a test tube.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 4 Helpful 14
Question

Why was the elodea plant used?

Community Answer

The elodea plant was used since it's a high oxygen producing plant. Also, it is an underwater plant.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 1 Helpful 6
Question

Can a leaf be used instead of the plant?

Community Answer

No. You need a whole plant so that the root can collect the water. A leaf can't collect water, it can only absorb sunlight with the chlorophyll.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 1 Helpful 6
Question

What would happen if grass was used instead of elodea?

Community Answer

It wouldn't turn out so well. Grass cannot survive being submerged in water like that, but the elodia plants thrive in ponds.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 5 Helpful 11
Question

What happens if sodium bicarbonate is added to water?

Community Answer

It will dissolve in the water.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 1 Helpful 5
Question

How can I prove water is essential for photosynthesis?

Community Answer

It's been proven for you. Scientist can give plants a special form of water called "heavy water " -- they trace this water and see where it goes. They can show that it is taken up and used in photosynthesis.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 3
Question

Why was the glass funnel placed on the blocks?

Community Answer

the funnel was placed on the blocks so that the water can come in and out of the funnel. Plants need the water.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 3
Question

What is the use of the funnel in the experiment?

Community Answer

It supports the test tube in the water so that it doesn't fall over. Also, the plant can't fit in a test tube, but the funnel has a wider mouth.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 2 Helpful 3
Question

What does the bubble mean?

Community Answer

The bubble means oxygen molecules are released. As oxygen is released during photosynthesis, it is formed in the beaker.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 1 Helpful 2
Question

Why can you not use a neem plant?

Community Answer

If you use a neem plant, the plant will die. You need a water plant like a pond weed.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 1 Helpful 1
Question

Why is it necessary to leave the green leaf tube in the dark for this experiment?

Community Answer

It shows that plants need sunlight to photosynthesize. The match needs oxygen to light, but there IS no oxygen in the test tube, so it won't light, proving that the plant didn't photosynthesize.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 2 Helpful 1
Question

What other plant can be used when showing oxygen as a byproduct of photosynthesis?

Community Answer

Mainly water plants are used. Some examples are Elodea, Ceratorphyllum or Cabomba.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 0 Helpful 2

Ask a Question

200 characters left

Include your email address to get a message when this question is answered.

Submit

Return to Full Article

You Might Also Like

-

-

.mwimg a.image{display:none}#header_logo{display:none}#cse-search-box{display:none}#cse-search-box-noscript{display:block !important}#cse-search-box-noscript .cse_q{color:#FFF;background-color:#B3CE9C}.wh_search .cse_q{width:88%}#mw-mf-main-menu-button{display:none;visibility:hidden}.header .search{display:none}#search_footer .cse_sa{background-image:url(/extensions/wikihow/mobile/images/white_mag.png);background-size:22px}.related_box{display:block;background:#EEE;border:5px solid #FFF;vertical-align:bottom;width:127px;background-size:180px;float:left;height:120px;position:relative}.related_box p{line-height:15px !important;font-size:13px;background-color:rgba(67,95,44,.4);color:#FFF;font-weight:bold;padding:8px;margin:0 !important;position:absolute;bottom:0}#noscript_header_logo{display:table-cell;vertical-align:middle;background-position:50% 77%;background-repeat:no-repeat;background-image:url(/extensions/wikihow/mobile/images/wikihow_logo_230.png);background-size:105px;width:auto;height:51px;padding:0 14px}.articleinfo{display:none}#iorg_free_data{z-index:50;width:100%;position:fixed}#ara_recommendations{display:none}