7th Grade Photosynthesis Quiz

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?

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

What is a chloroplast?

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

What is chlorophyll?

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

What are the reactants of photosynthesis?

Carbon Dioxide, Water, and Sunlight Signup and view all the answers

What are the products of photosynthesis?

Glucose and Oxygen Signup and view all the answers

What is an autotroph?

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

What is a heterotroph?

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

What does 'photo' mean in Latin?

Light Signup and view all the answers

What does 'synthesis' mean in Latin?

Putting together Signup and view all the answers

How many stages of photosynthesis are there?

Two stages Signup and view all the answers

What is glucose?

C6H12O6 Signup and view all the answers

What is the role of roots in plants?

Brings in H2O from the soil. Signup and view all the answers

Why do humans need photosynthesis?

Oxygen and Food Signup and view all the answers

What is the light reactant needed for photosynthesis?

Sunlight Signup and view all the answers

What is water's role in photosynthesis?

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

What is the chemical compound of water?

H2O Signup and view all the answers

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

Sunlight Signup and view all the answers

What do photosynthesizers produce that is needed by organisms?

Oxygen Signup and view all the answers

What is carbon dioxide?

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

What is the function of water in plants?

Absorbed by the roots of plants. 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.