With Answer Key — Photosynthesis Starts

They checked the soil. It was dry as dust. Leo watered Fronda immediately.

Within an hour, Fronda’s leaves began to perk up. By afternoon, she was vibrant green again.

Leo frowned. “But the sun is shining right on her.” photosynthesis starts with answer key

Ms. Green continued, “ these three ingredients: sunlight, water, and carbon dioxide. Inside the leaves, tiny structures called chloroplasts capture the sun’s energy. That energy splits water into hydrogen and oxygen. Then, the hydrogen combines with carbon dioxide to make glucose—plant food. Oxygen is released as a byproduct.”

“So that’s why plants need water and sun!” Leo said. They checked the soil

| Question | Answer | |----------|--------| | What are the three essential ingredients for photosynthesis? | Sunlight, water, carbon dioxide | | Where does photosynthesis happen inside a plant cell? | In the chloroplasts | | What gas is released as a byproduct of photosynthesis? | Oxygen | | What sugar does the plant make for food? | Glucose | | Why did Fronda the fern look pale at first? | The soil was dry (no water) | “Photosynthesis starts with ______.” Answer: sunlight

“True,” Ms. Green said. “But more than just light. It needs a partner: water from the soil and carbon dioxide from the air.” Within an hour, Fronda’s leaves began to perk up

“Exactly,” said Ms. Green. “And remember: sunlight—but without water and CO₂, it’s just a sunny day, not a meal.” Answer Key (for review or quiz) Use these answers to check understanding of the story.