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Photosynthesis

Worksheets

Table of contents Below is a list of all the worksheets included in this document.

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.

Photosynthesis Facts For All Seasons Photosynthesis in Diagram Process Synthesis Non-Photosynthetic Catalog All Shapes and Sizes Plant Essentials Photosynthetic Truth The Great Heights Photosynthetic Catalog Above Heights and Under Water

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Photosynthesis Facts

Photosynthesis is a process used by plants, algae and certain bacteria to turn energy from sunlight into chemical energy. Oxygenic and anoxygenic photosynthesis are the two types of photosynthetic processes. SCIENCE BEHIND PHOTOSYNTHESIS

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Photosynthesis as a process is commonly written as:

6CO2 + 6H2O + light energy → C6H12O6 + 6O2 REACTANT

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CHLOROPHYLL

PRODUCTS

The formula indicates that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll into a sugar molecule and six oxygen molecules. KIDSKONNECT.COM

Photosynthesis Facts ❖

In common terms, photosynthesis in plants uses light energy to convert water, carbon dioxide, and minerals into oxygen and other energy-rich organic compounds.

Lig ht ene rgy CO

Chlorophyll absorbs green wavelengths from the sun, which makes plants look green

2

Carbon dioxide enters through openings on the leaf called the stomata. Water, CO2, and sunlight combine er t a in the leaf to make W sugar. Through the roots, water is absorbed and carried through the stem via xylem vessels and distributed to the rest of the plant. ❖

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en Ox y g Oxygen and water vapor exit through the stomata. Excess sugar produced is stored as starch in the roots while others are transported around the plant in the phloem vessels.

As autotrophs, plants can use light energy to synthesize their own food source. Glucose, a simple form of sugar, serves as food for plants to survive. Aside from plants, algae and some microorganisms also perform photosynthesis. Unlike animals that take in gases in the atmosphere through respiration, plants take in carbon dioxide gas for photosynthesis. KIDSKONNECT.COM

Photosynthesis Facts ❖ ❖ ❖ ❖

The light energy from the sun breaks down the molecules of carbon dioxide and water to make sugar and oxygen gas. After making sugar, it is then broken down into energy by the mitochondria for growth and repair. The oxygen is then released through the stomata, the same tiny holes where carbon dioxide enters. Oxygenic and anoxygenic are the two types of photosynthetic processes. They are very similar; however, the oxygenic type is the most common in plants, algae, and cyanobacteria.

Oxygenic photosynthesis is written as:

6CO2 + 12H2O + light energy → C6H12O6 + 6O2 + 6H2O Anoxygenic photosynthesis is written as:

CO2 + 2H2A + light energy → [CH2O] + 2A + H2 O ❖ ❖ ❖ ❖

Plants possess three pigments, which are essential in giving plants color and trapping wavelengths of light. Chlorophyll is a green-colored pigment which traps blue and red light. Carotenoids are the red, orange or yellow-colored pigments which absorb bluish-green light. Phycobilins are red and blue pigments which absorb excess wavelengths that are not absorbed well by chlorophyll and carotenoid. They are common in cyanobacteria and red algae. KIDSKONNECT.COM

Photosynthesis Facts ❖

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In 1771, English clergyman and scientist Joseph Priestley began the study of photosynthesis. He burned a candle in a closed container and then placed a sprig of a mint plant in it. After a few days, he observed that the mint produced a gas, later named oxygen. Priestley's work was later expanded by Dutch physician Jan Ingenhousz by exposing the plant to light. Structure of a chloroplast

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A vital structural unit of photosynthesis is the thylakoid. Thylakoids are stacked like pancakes into groups collectively known as grana. The areas between the grana are known as stroma. A chloroplast has three membrane systems forming compartments.

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A vital structural unit of photosynthesis is the thylakoid. Thylakoids are stacked like pancakes into groups collectively known as grana. The areas between the grana are known as stroma. A chloroplasts has three membrane systems forming compartments.

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Photosynthesis Facts Diagram showing Calvin cycle

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the

The Calvin cycle is a process in photosynthesis, wherein plants and algae use it to turn carbon dioxide from the air into sugar.

The cycle has four main steps: carbon fixation, reduction phase, carbohydrate formation, and regeneration phase. The process was first identified in 1957 by American biochemist Dr Melvin Calvin. ADDITIONAL INFORMATION

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Photosynthesis is the process for green plants to produce food for themselves and oxygen for all other living organisms, including animals and humans. Without this process, the carbon cycle could not occur, and oxygen could not be produced for life to survive. There are also non-photosynthetic plants that do not use the energy to produce their own food. Most are considered parasitic and rely on a host to survive.

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Photosynthesis Facts ❖

An example is the Indian pipe plant (Monotropa uniflora), also known as the ghost or corpse plant, which belongs to the fungi kingdom along with mushrooms and molds. The white color indicates that it contains no chlorophyll. ❖

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During the daytime, plants take in carbon dioxide and release oxygen. The greener the plant, the more oxygen is released than used. Plants are known as producers, while animals and humans are consumers.

Image of the Indian pipe plant

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Name: ____________________________

For All Seasons Most places on Earth experience four (4) distinct seasons. These seasons affect plant life, depending on the solar energy they receive. What would trees look like in each of the four seasons? Briefly describe each.

WINTER

SPRING

PHOTOSYNTHESIS WORKSHEETS

SUMMER

AUTUMN

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Name: ____________________________

Photosynthesis in Diagram Photosynthesis is the process where a plant uses chlorophyll to turn the sun’s energy into sugar and oxygen. Properly label the process of photosynthesis.

PHOTOSYNTHESIS WORKSHEETS

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Photosynthesis in Diagram ANSWER KEY

Chlorophyll absorbs green wavelengths from the sun, which makes plants look green

Lig ht ene rgy

O

Oxygen and water vapor exit through the stomata

Carbon dioxide enters through the stomata of the leaf CO

2

Water, CO2, and sunlight combine in the leaf to make sugar Through the roots, water is absorbed and carried through the stem via xylem vessels and distributed to the rest of the plant

n ge y x

er t a W

PHOTOSYNTHESIS WORKSHEETS

Excess sugar produced is stored as starch in the roots while others are transported around the plant in the phloem vessels KIDSKONNECT.COM

Name: ____________________________

Process Synthesis To sum it up, photosynthesis can be written in a word equation, as shown below. Your task is to explain the process of photosynthesis. Be careful when using chemical terms. Finding their meaning would help you understand the process of photosynthesis.

SUNLIGHT CARBON DIOXIDE + WATER GLUCOSE + OXYGEN

IN COMMON EQUATION:

YOUR NARRATIVE

PHOTOSYNTHESIS WORKSHEETS

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Process Synthesis ANSWER KEY

SUNLIGHT CARBON DIOXIDE + WATER GLUCOSE + OXYGEN

IN COMMON EQUATION: 6CO2 + 6H2O + light energy → C6H12O6 + 6O2 YOUR NARRATIVE In common terms, photosynthesis in plants uses light energy to convert water, carbon dioxide, and minerals into oxygen and other energy-rich organic compounds. The light energy from the sun breaks down the molecules of carbon dioxide and water to make sugar and oxygen gas. After making sugar, it is then broken down into energy by the mitochondria for growth and repair.

PHOTOSYNTHESIS WORKSHEETS

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Name: ____________________________

Non-Photosynthetic Catalog Some plants are heterotrophic and live parasitically on other plants to survive. They lack the ability to produce their own food, like most green plants. Can you look for non-photosynthetic plants on the Internet? Describe their physical characteristics and source of food.

PHOTOSYNTHESIS WORKSHEETS

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Name: ____________________________

All Shapes and Sizes Collect six different leaves in your area. Arrange them according to size and shape. Use these leaves as a reference for the next page.

1

2

3

4

5

6

PHOTOSYNTHESIS WORKSHEETS

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All Shapes and Sizes Name of plants you pasted:

Leaf

1.

4.

2.

5.

3.

6.

Size and Shape

Leaf color (hue)

Kind of plant

Environment they grow in

1 2 3 4 5 6

Answer the following questions.

Do their hue/colors differ? ___________________________________________________________ ___________________________________________________________ ________________________________________________________ PHOTOSYNTHESIS WORKSHEETS

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All Shapes and Sizes Answer the following questions.

What affects the color of the leaves? ___________________________________________________________ ___________________________________________________________ ________________________________________________________ Do their sizes and shapes affect their ability to produce glucose and oxygen? How? ___________________________________________________________ ___________________________________________________________ ________________________________________________________ __________________________________________________________ Do their environment affect their growth? How? ___________________________________________________________ ___________________________________________________________ ________________________________________________________

How important is sunlight (solar power) to plants? _______________ _______________ _______________ _______________ _______________ _______________ _

PHOTOSYNTHESIS WORKSHEETS

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Name: ____________________________

Plant Essentials The pictures surrounding this plant are essential for growth. Circle the primary needs of plants and put a square around the secondary needs. Explain why these are secondary needs.

PRIMARY NEEDS

SECONDARY NEEDS

WHY ARE THESE SECONDARY NEEDS?

PHOTOSYNTHESIS WORKSHEETS

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Plant Essentials ANSWER KEY

PRIMARY NEEDS

SECONDARY NEEDS

WHY ARE THESE SECONDARY NEEDS?

PHOTOSYNTHESIS WORKSHEETS

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Name: ____________________________

Photosynthetic Truth The following facts are true, but the underlined words may not be. Write the correct answer if the underlined part makes the whole sentence wrong. Write TRUE, if otherwise. In common terms, respiration in plants uses light energy to convert water, carbon dioxide, and minerals into oxygen and other energy-rich organic compounds. Oxygen and water through the roots.

vapor

exit

Fructose is a form of sugar serving as food for plants to survive. Thylakoids are stacked like pancakes in stacks collectively known as grana. Veins called stomata and mitochondria transport water, mineral ions, and glucose around the plant. The fixation is a process in photosynthesis, wherein plants and algae turn carbon dioxide from the air into sugar. PHOTOSYNTHESIS WORKSHEETS

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Photosynthetic Truth ANSWER KEY

In common terms, photosynthesis in plants uses light energy to convert water, carbon dioxide, and minerals into oxygen and other energy-rich organic compounds. Oxygen and water through the stomata.

vapor

exit

Glucose is a form of sugar serving as food for plants to survive. Thylakoids are stacked like pancakes in stacks collectively known as grana. TRUE Veins called xylem and phloem transport water, mineral ions, and glucose around the plant. The Calvin cycle is a process in photosynthesis, wherein plants and algae turn carbon dioxide from the air into sugar. PHOTOSYNTHESIS WORKSHEETS

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Name: ____________________________

The Great Heights The California redwood is the tallest tree in the world and stands about 379 feet tall. Observe some of the tallest trees in your neighborhood and answer the given guide questions.

Describe the shape and size of the leaves. ____________________ ____________________ ____________________ ________________

Why do many trees in the forest continued to grow taller? ____________________ ____________________ ____________________ ____________________ _______________

How significant are tall trees? ____________________ ____________________ ____________________ ____________________ _______________

PHOTOSYNTHESIS WORKSHEETS

What are the advantages and disadvantages of being the tallest tree? ____________________ ____________________ ____________________ ____________________ ____________________ ____________________ ____________________ ____________________ ___________

Why do they reach great heights but eventually stop growing? ____________________ ____________________ ____________________ ________________ ____________________ __________________

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Name: ____________________________

Photosynthetic Catalog Plants are responsible for producing oxygen that sustains ife on Earth. Complete the catalog based on the requirements needed. It will be better if you use photos of plants in your own neighbourhood.

PLANTS THAT NEED MORE SUNLIGHT

PLANTS THAT NEED MORE WATER

PHOTOSYNTHESIS WORKSHEETS

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Name: ____________________________

Above Heights and Under Water Plants underwater and tall trees conduct photosynthesis uniquely. Do some research on how these kinds of plants produce food. Make a short article highlighting their respective adaptations.

PHOTOSYNTHESIS WORKSHEETS

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