7th Grade Photosynthesis Quiz
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Questions and Answers

What is photosynthesis?

Plants use the sun's energy to convert water and carbon dioxide into sugars.

What is the photosynthesis equation?

6CO2 + 6H2O --> light energy --> C6H12O6 + 6O2

What provides the carbon atoms that are incorporated into sugar molecules in the Calvin cycle?

Carbon Dioxide (CO2)

What are stomata?

<p>Small openings on the underside of a leaf through which oxygen and carbon dioxide can move.</p> Signup and view all the answers

What is a chloroplast?

<p>An organelle found in plant and algae cells where photosynthesis occurs.</p> Signup and view all the answers

What is chlorophyll?

<p>A green pigment found in the chloroplasts of plants, algae, and some bacteria that is used to carry out photosynthesis.</p> Signup and view all the answers

What are the reactants of photosynthesis?

<p>Carbon Dioxide, Water, and Sunlight</p> Signup and view all the answers

What are the products of photosynthesis?

<p>Glucose and Oxygen</p> Signup and view all the answers

What is an autotroph?

<p>An organism that makes its own food through photosynthesis.</p> Signup and view all the answers

What is a heterotroph?

<p>An organism that cannot make its own food and gets food by consuming other living things.</p> Signup and view all the answers

What does 'photo' mean in Latin?

<p>Light</p> Signup and view all the answers

What does 'synthesis' mean in Latin?

<p>Putting together</p> Signup and view all the answers

How many stages of photosynthesis are there?

<p>Two stages</p> Signup and view all the answers

What is glucose?

<p>C6H12O6</p> Signup and view all the answers

What is the role of roots in plants?

<p>Brings in H2O from the soil.</p> Signup and view all the answers

Why do humans need photosynthesis?

<p>Oxygen and Food</p> Signup and view all the answers

What is the light reactant needed for photosynthesis?

<p>Sunlight</p> Signup and view all the answers

What is water's role in photosynthesis?

<p>Reactant for photosynthesis that is absorbed by the roots of a plant.</p> Signup and view all the answers

What is the chemical compound of water?

<p>H2O</p> Signup and view all the answers

What is the main source of energy for life on Earth?

<p>Sunlight</p> Signup and view all the answers

What do photosynthesizers produce that is needed by organisms?

<p>Oxygen</p> Signup and view all the answers

What is carbon dioxide?

<p>A gas that is expelled from the body by the respiratory system.</p> Signup and view all the answers

What is the function of water in plants?

<p>Absorbed by the roots of plants.</p> Signup and view all the answers

Study Notes

Photosynthesis Overview

  • Process by which plants convert sunlight into chemical energy, producing sugars and oxygen.
  • Key equation: 6CO2 + 6H2O + light energy → C6H12O6 + 6O2.

Photosynthesis Components

  • Carbon Dioxide (CO2): Source of carbon for sugar synthesis during the Calvin cycle.
  • Water (H2O): Absorbed by plant roots; essential reactant in photosynthesis.
  • Sunlight: Primary energy source that powers photosynthesis.

Photosynthesis Organs

  • Chloroplasts: Organelles in plant and algae cells where photosynthesis occurs.
  • Stomata (stoma): Small openings on leaf undersides that facilitate gas exchange.

Pigments and Energy

  • Chlorophyll: Green pigment in chloroplasts crucial for capturing sunlight during photosynthesis.

Types of Organisms

  • Autotroph/Producer: Organisms that produce their own food via photosynthesis.
  • Heterotroph/Consumer: Organisms that obtain energy by consuming other living things.

Importance of Photosynthesis

  • Key for oxygen production, essential for respiration in many organisms.
  • Provides glucose, fundamental for energy in living systems.

Photosynthesis Process

  • Consists of two main stages.
  • The light-dependent reactions capture sunlight and convert it to chemical energy, while the Calvin cycle uses ATP and NADPH to produce glucose.

Key Terms

  • Glucose: A simple sugar (C6H12O6) formed during photosynthesis.
  • Reactants: Water, carbon dioxide, and sunlight are necessary for photosynthesis.
  • Products: By-products of photosynthesis include glucose and oxygen.

Latin Roots

  • Photo: Means "light".
  • Synthesis: Means "putting together".

Human Dependency

  • Humans rely on photosynthesis for oxygen and food, highlighting its critical role in sustaining life on Earth.

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Description

Test your understanding of photosynthesis with this 7th-grade quiz. Explore key concepts such as the photosynthesis equation, the role of carbon dioxide, and stomata. Perfect for students looking to reinforce their knowledge on plant energy conversion.

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