photosynthesis and the scientific method worksheet answers

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Photosynthesis Biointeractive Animations Student Worksheet

Unit 3: cellular energetics, thomas jefferson high school for science and technology - alexandria.

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Photosynthesis published march 2019, student worksheet, photosynthesis, introduction, this worksheet complements the animation series photosynthesis., 1. this animation series contains seven parts. read the questions below for each part before watching it., 2. after watching each part, answer the questions in the spaces provided., 3. after completing all seven parts of the animation, answer the summary questions in part 8., part 1: overview, 1. which of the following kinds of organisms do photosynthesis select all that apply., ____plants ____fungi ____animals ____algae ____all bacteria ____some bacteria, 2. what is the overall purpose of photosynthesis, 3. on diagram 1, fill in the labels with photosynthesis’s main inputs and outputs of matter and energy., part 2: chemical process, 1. complete the following sentence., photosynthesis is a set of ____________________________ in which ____________energy is converted to, __________________energy., 2. on diagram 2, fill in the labels with the following descriptions. some of the objects have multiple labels..

• water (H 2 O)
• carbon dioxide (CO 2 )
• oxygen (O 2 )
• G3P (sugar)
• electron acceptor
• electron donor
• carbohydrates
• energy input

PART 3: LEAF STRUCTURE

1. in what plant structures does photosynthesis occur make your description as specific as you can., 2. on diagram 3, complete the following tasks., a) draw how co 2 gets into, b) draw how o 2 gets out of, c) label the name of the, structure through which, these gases pass., 3. what structure is used to transport organic molecules from the leaf to other parts of the plant, 4. why are leaves green, a) label psi, b) draw the, path of the, the events of the light reactions, 3. for psii, the cytochrome complex, and psi, draw and label what happens at that structure on diagram 6., then describe the events in a bulleted list in table 1., 4. at the end of the electron transport chain, where is the light energy that was absorbed and converted by, chlorophyll stored list two answers., table 1: descriptions of the steps in the light reactions., structure what is happening with matter what is happening with energy, chemiosmosis and atp synthase, 5. label the atp synthase on diagram 6., 6. describe how the proton (h+ ) gradient is used to make atp., 7. what two molecules bring chemical energy from the light reactions to the next stage of photosynthesis, the, calvin cycle, part 6: calvin cycle, 1. label diagram 7 with the three phases of the calvin cycle., briefly describe what is going on in each phase and answer the questions shown., phase 1 (diagram 8), description:, what enzyme catalyzes the reaction in this phase, part 8: test your knowledge, 1. based on everything you’ve learned from the animations, what is the overall purpose of photosynthesis, 2. describe how oxygen gas (o 2 ) is produced during photosynthesis. include the specific structures in the plant, where the reaction occurs., 3. describe the path of an electron from a molecule of water to the sugar g3p., 4. describe how atp is produced in the light reactions., 5. which of the following statements best explains how the energy in a photon of light is stored in a molecule of, the sugar g3p ________, a. light energy directly provides energy to rubp and co 2 , which produce g3p in the calvin cycle., b. light energy directly provides energy to atp synthase, which produces atp during the light reactions., c. light energy energizes electrons to make atp and nadph, which provide energy to produce g3p in the, calvin cycle., 6. when three molecules of carbon dioxide (co 2 ) react with three molecules of rubp during the calvin cycle, six, molecules of the sugar g3p are produced. one g3p molecule exits the calvin cycle during phase 2. what, happens to the other five g3p molecules.

• Multiple Choice

Topic : Unit 3: Cellular Energetics

Subject : ap biology, this is a preview.

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Home > Science Worksheets > Photosynthesis

Approximately 85% of the world's oxygen is due to this process. That is why if the sun were to suddenly stop producing light, not only would it be dark; we would not be able to breathe much longer. These worksheets explore all aspects of the process of photosynthesis. This collective series of worksheets helps students investigate this process and examine where it happens. We move on to understand the chemistry that takes place in this process and how we have used that knowledge to mimic the process and create our own energy artificially. We also spend a good amount of time understanding the organisms that can perform this much needed activity.

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Printable photosynthesis worksheets, click the buttons to print each worksheet and answer key..

What is It?

Plant respiration is the opposite of ours, since we breathe out carbon dioxide and plants breathe out oxygen.

What is It? Questions

Different kinds of plants need differing amounts of sunlight and water to thrive.

Photosynthesis and Cellular Respiration

Together, photosynthesis and cellular respirations are the basis of all life on Earth. The oxygen that is released by plants during photosynthesis is used by humans and almost all other organisms for our cellular respiration.

QUESTIONS: Photosynthesis and Cellular Respiration

Which process requires carbon dioxide and gives off oxygen?

Activities like eating and excretion are also part of the carbon cycle, as carbon is being taken into and passed back out of living organisms.

QUESTIONS: Carbon

When we burn these substances, the energy that plants once captured from the sun through photosynthesis is released back out into the atmosphere.

Artificial Photosynthesis

This technology, which is called direct solar water splitting, could also be adjusted in order to turn carbon dioxide back into fuel.

QUESTIONS: Artificial Photosynthesis

Why is producing hydrogen fuel currently hard on the environment?

Photosynthetic Organisms

Prokaryotic organisms are single-celled organisms that do not contain a nucleus.

QUESTIONS: Photosynthetic Organisms

Plants, algae, and cyanobacteria all use the Calvin cycle to fix carbon dioxide.

Anoxygenic Photosynthesis

In this process while sunlight is still used to fix carbon, during the reaction something other than water donates an electron.

QUESTIONS: Anoxygenic Photosynthesis

How is green nonsulfur bacteria different from green sulfur bacteria?

Chloroplasts

Only plants and photosynthetic organisms contain chloroplasts. Simple cells, like those of photosynthetic algae, may only contain several chloroplasts.

QUESTIONS: Chloroplasts

Where exactly within the chloroplast is chlorophyll located?

Light and Dark Reactions

In the first step, sunlight is captured by the chloroplasts when molecules of chlorophyll absorb energy (in the form of sunlight).

QUESTIONS: Light and Dark Reactions

What other methods are there for an organism to use CO 2 to make sugars?

Artificial Light

There are some key differences between sunlight and artificial light. Though artificial lights can mimic the full spectrum of natural light, the energy emitted by an artificial light in the red and blue spectrums does not have as much energy as the red and blue spectrums of natural sunlight.

QUESTIONS: Artificial Light

What kind of light was warm, indoor lighting contain a lot of?

Water and Heat

One of the characteristics of global warming is an increase of carbon dioxide in the air.

QUESTIONS: Water and Heat

How can prolonged stress from drought affect a plant?

How Photosynthesis Works

Photosynthesis is the primary source of oxygen in the Earth's atmosphere. As almost all living forms on the planet need oxygen, life would soon cease to exist without photosynthesis. 

Photosynthesis works through a process where plants (as well as algae and cyanobacteria) generate energy from sunlight, water, and carbon dioxide. Oxygen is then released into the atmosphere as a byproduct of the reaction.

All living things on the planet need energy in order to survive. Humans take their food in through their mouths as they eat all types of different things. Plants on the other hand get their energy from the light given off by the sun. Three things need to be present for a plant to be able to undergo photosynthesis this includes: carbon dioxide, sunlight, and water. Plants take the carbon dioxide in through little holes in their leaves called stomata. The plant absorbs water from the soil using roots and gets that water to the rest of the body. As the sunlight passes through the leaves of the plants it travels through ton of chloroplasts found within the leaf. Within those chloroplasts the water molecules are split into hydrogen and oxygen. The oxygen leaves the leaf and the remaining hydrogen and carbon dioxide are used to form glucose which is a usable form of energy for the plant.

The Mechanism of Photosynthesis

As mentioned, the three components essential for photosynthesis are sunlight, carbon dioxide, and water. Together, they transform light energy into chemical energy.

Plants convert solar energy into chemical energy that life forms can use. They also form the basis of the food chain, passing that energy to other species. The beauty of photosynthesis is that oxygen is released as a byproduct of the reaction, filling the atmosphere with the gas all living forms depend on. If you come to think about it, photosynthesis is probably the most important biological process of all.

However, it is important to note that while plants consume carbon dioxide and release oxygen during photosynthesis, they also have respiratory processes during which they do the opposite. About half the amount of carbon dioxide plants consume is released by them as a result of cellular respiration.

Light-Dependent Reactions

Light-dependent reactions happen during the day, as they require a constant supply of light.

Sunlight is absorbed by chlorophyll that is contained in chloroplasts. Chloroplasts are organelles contained in the leaves, and chlorophyll is a ferment that absorbs the energy from red and blue light waves. Chlorophyll also makes plants appear green, as it reflects green light.

Then, the light energy is converted into chemical energy. To perform this stage, plants need water. The light energy is used to start a reaction and split the water molecule, which allows releasing chemical energy in the form of Adenosine Triphosphate (ATP) and Nicotinamide Adenine Dinucleotide Phosphate (NADPH) molecules. While H (hydrogen) later becomes a part of a glucose molecule, O2 (oxygen) is released into the atmosphere as a byproduct.

Light-Independent Reactions

Light independent reactions do not require light streams and thus happen during the night. This stage is also known as the Calvin Cycle .

Carbon dioxide enters the pores called stomata which are usually located at the bottom of a leaf. Then, carbon dioxide molecules are diffused into the stroma, the protein-containing matrix between the thylakoid membranes and the chloroplast membranes.

Stroma is where the rest of the process happens. The chemical energy released during the previous stage in the forms of ATP and NADPH is used to extract carbon from carbon dioxide and later form a glucose molecule. It requires six molecules of carbon dioxide, and therefore six turns of the cycle, to create one molecule of glucose.

A Short Summary of Photosynthesis

Here's a brief overview of the steps involved in photosynthesis to help you quickly grasp how the process works.

• Light is absorbed by chlorophyll, a ferment contained in leaves.
• Light energy is converted into chemical energy: light energy is used to split a water molecule. The reaction releases chemical energy.
• Oxygen is released into the atmosphere as a byproduct of the reaction.
• Carbon dioxide enters through pores called stomata and is moved into a stroma.
• In the stroma, previously released chemical energy is used to extract carbon from carbon dioxide. Carbon is then used to form a glucose molecule (sugar).

While oxygen is produced as a result of photosynthesis, the primary function of the process for plants is producing energy in the form of sugars. Oxygen is only a byproduct that gets released into the atmosphere. Still, photosynthesis is not only the basic source of energy for all living creatures but also the primary source of oxygen in our atmosphere.