Photosynthesis and Cellular Respiration

Intro to Photosynthesis

Our bodies have amazing processes that help us generate energy and survive! Plants have the unique ability to make their own food through photosynthesis. They take in carbon dioxide and water, and with sunlight, turn them into sugar and oxygen.

Two Main Steps

Light-Dependent Reactions: Sunlight hits the plant’s chloroplasts producing two energy-sources (ADP and NADPH).
Calvin Cycle: Plants use these molecules to turn carbon dioxide into sugar.

Fun Fact

Photosynthesis is influenced by light and temperature. More sunlight and warmth can speed it up!

Cellular Respiration

Plants and animals use cellular respiration to convert sugar into energy (ATP).

Glycolysis: This reaction breaks sugar down. Though it takes energy, it yields more in the form of ATP.
Krebs Cycle: Produces even more ATP from intermediate products.

Conclusion

Photosynthesis and cellular respiration are vital processes that sustain life on Earth!

Challenge

Can plants move? Let's find out!

Start by writing down your prediction—this is called a hypothesis.
With an adult's help, plant a seed and observe its growth over time.
Keep a journal and watch closely to note any changes or movements you see.

After your plant has grown, review your observations. Did you find your answer?

Order the Processes

Calvin Cycle

Glycolysis

Energy is produced

Plants take in carbon dioxide and water

Glucose is produced

Krebs Cycle

Light Dependent Reactants

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