5th Grade Intro to Photosynthesis Quiz

What is photosynthesis?

• A process where animals make food

• A process where plants make their own food

• A way plants take in oxygen

• A way plants grow in the dark

Answer explanation

Photosynthesis is the process where plants use sunlight to convert carbon dioxide and water into glucose and oxygen, allowing them to make their own food. This distinguishes it from the other options, which are incorrect.

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Where does photosynthesis happen in plants?

• In the roots

• In the stems

• In the flowers

• In the leaves

Answer explanation

Photosynthesis primarily occurs in the leaves of plants, where chlorophyll captures sunlight and converts carbon dioxide and water into glucose and oxygen, making leaves the main site for this vital process.

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What three things do plants need for photosynthesis?

• Oxygen, sunlight, water

• Sunlight, carbon dioxide, water

• Soil, water, oxygen

• Carbon dioxide, sunlight, fertilizer

Answer explanation

Plants need sunlight, carbon dioxide, and water for photosynthesis. The correct answer is 'Sunlight, carbon dioxide, water' as these are the essential components for the process, while oxygen is a byproduct.

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What is the role of chlorophyll in photosynthesis?

• It absorbs sunlight for the plant

• It makes the plant green

• It helps the plant take in water

• It stores the plant’s food

Answer explanation

Chlorophyll is essential in photosynthesis as it absorbs sunlight, which provides the energy needed for plants to convert carbon dioxide and water into glucose and oxygen. This process is vital for the plant's growth and energy.

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How do plants get carbon dioxide from the air?

• Through their stems

• Through their roots

• Through stomata in their leaves

• Through their flowers

Answer explanation

Plants get carbon dioxide from the air through stomata, which are tiny openings on the surface of their leaves. This process allows them to take in CO2 for photosynthesis, making stomata essential for their growth.

What is glucose, and why is it important to plants?

• It is a type of sugar and it’s the plant’s food

• It is a type of water and helps plants stay cool

• It is a type of gas and helps plants make oxygen

• It is a type of light that helps plants grow

Answer explanation

Glucose is a type of sugar produced by plants during photosynthesis. It serves as their primary source of energy and is essential for growth and development, making it crucial for plant survival.

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What do plants release into the air as a result of photosynthesis?

• Carbon dioxide

• Glucose

• Water

• Oxygen

Answer explanation

During photosynthesis, plants convert carbon dioxide and water into glucose and oxygen. The oxygen produced is released into the air, making it the correct answer.

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Why is photosynthesis important to animals and humans?

• It gives us carbon dioxide to breathe

• It produces food and oxygen, which we need to live

• It creates sugar that animals eat

• It removes oxygen from the air

Answer explanation

Photosynthesis is crucial because it produces food and oxygen. Animals and humans rely on oxygen for respiration and food for energy, making this process essential for our survival.

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What would happen to plants if they couldn’t perform photosynthesis?

• They would continue growing normally

• They would stop growing and eventually die

• They would grow faster

• They would start producing more oxygen

Answer explanation

If plants cannot perform photosynthesis, they cannot produce the energy needed for growth. This would lead to stunted growth and ultimately death, as they rely on photosynthesis for sustenance.

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Explain the connection between sunlight and plant growth.

• Plants use sunlight to make food through photosynthesis, which helps them grow

• Plants need sunlight to take in oxygen, which helps them grow

• Sunlight keeps plants warm so they can grow

• Sunlight helps plants move water from their roots to their leaves

Answer explanation

Plants use sunlight to perform photosynthesis, a process that converts light energy into chemical energy, allowing them to produce food. This food is essential for their growth and development.

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