7th Grade Science

Studying life science, physical science, and Earth science integration.

Cells and Living ThingsForces and MotionEarth’s Systems
Photosynthesis and Energy FlowStates of Matter and ChangesWeather, Climate, and Human Impact
Investigating EcosystemsSimple Physics Experiments at HomeWeather Observation and Data Collection
Using Graphic OrganizersPracticing with Real-Life ScenariosMaking and Testing Predictions
Cells and Living Thi...Forces and MotionEarth’s SystemsPhotosynthesis and E...States of Matter and...Weather, Climate, an...Investigating Ecosys...Simple Physics Exper...Weather Observation ...Using Graphic Organi...Practicing with Real...Making and Testing P...
Advanced Topics

Photosynthesis and Energy Flow

How Do Plants Make Food?

Plants use a process called photosynthesis to turn sunlight, water, and carbon dioxide into food (glucose) and oxygen.

The Photosynthesis Formula

\(\text{6CO}_2 + \text{6H}_2\text{O} + \text{light energy} \rightarrow \text{C}6\text{H}{12}\text{O}_6 + \text{6O}_2\)

Energy Flow in Ecosystems

  • Producers: Plants that make their own food.
  • Consumers: Animals that eat plants or other animals.
  • Decomposers: Organisms that break down dead plants and animals.

This flow of energy is what keeps ecosystems alive and balanced.

Why Is This Important?

Without photosynthesis, there would be no oxygen for animals to breathe and no food to eat!

Key Formula

\[6CO_2 + 6H_2O + \text{light energy} \rightarrow C_6H_{12}O_6 + 6O_2\]

Examples

  • Grass using sunlight to grow, which is then eaten by a rabbit.

  • A compost pile breaking down dead leaves to enrich soil.

In a Nutshell

Photosynthesis allows plants to capture energy from the sun and support life on Earth.

Key Terms

Photosynthesis
The process plants use to make food from sunlight.
Producer
An organism that makes its own food, usually using sunlight.
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States of Matter and Changes