Energy Flow and Photosynthesis Quiz
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Questions and Answers

What percentage of the Sun’s energy is absorbed by living organisms?

  • 30%
  • 0.023% (correct)
  • 19%
  • 70%

Photosynthesis occurs in producers and converts light energy into chemical energy.

True (A)

What chemical is responsible for making plants green and absorbing light energy?

chlorophyll

Consumers are organisms that obtain energy from ______.

<p>other sources</p> Signup and view all the answers

Match the following types of organisms with their definitions:

<p>Producers = Organisms that make their own food Consumers = Organisms that obtain energy from other sources Autotrophic = Organisms that produce their own energy Heterotrophic = Organisms that rely on others for energy</p> Signup and view all the answers

What is the primary process by which plants convert light energy into chemical energy?

<p>Photosynthesis (A)</p> Signup and view all the answers

All organisms are autotrophic and produce their own food.

<p>False (B)</p> Signup and view all the answers

What term is used for organisms that make their own food?

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

Approximately ___% of the Sun's energy is absorbed by living organisms.

<p>0.023</p> Signup and view all the answers

Match the types of organisms with their definitions:

<p>Producers = Organisms that make their own food through photosynthesis Consumers = Organisms that obtain energy from other sources Autotrophic = Organisms that produce their own food Heterotrophic = Organisms that rely on others for energy</p> Signup and view all the answers

What is the main gas released by plants during photosynthesis?

<p>Oxygen (D)</p> Signup and view all the answers

Plants obtain energy directly from the Sun in a usable form.

<p>False (B)</p> Signup and view all the answers

Name a type of producer found in Ontario.

<p>Oak Tree</p> Signup and view all the answers

The chemical responsible for making plants green and absorbing light energy is called _____ .

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

Which statement about the Sun's energy is correct?

<p>Most of the Sun's energy is absorbed by the atmosphere. (D)</p> Signup and view all the answers

What percentage of the Sun's energy is reflected by clouds and Earth's surface?

<p>30% (D)</p> Signup and view all the answers

The Sun's energy is primarily in the form of thermal energy.

<p>False (B)</p> Signup and view all the answers

What is the name of the process by which plants convert light energy into chemical energy?

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

Match the following terms with their descriptions:

<p>Autotrophic = Organisms that make their own food Heterotrophic = Organisms that obtain energy from other sources Producers = Organisms that make their own food Consumers = Organisms that obtain energy from other sources</p> Signup and view all the answers

Which of the following is NOT a producer found in Ontario?

<p>Squirrel (B)</p> Signup and view all the answers

During photosynthesis, plants release carbon dioxide.

<p>False (B)</p> Signup and view all the answers

What is the name of the process by which organisms break down food to release energy?

<p>Cellular Respiration</p> Signup and view all the answers

Organisms that do not produce their own food and must obtain energy from other sources are called ______.

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

Which of the following is a word equation representing photosynthesis?

<p>Carbon dioxide + water + light energy → sugar + oxygen (B)</p> Signup and view all the answers

Flashcards

Photosynthesis

The process by which plants use light energy to convert carbon dioxide and water into sugar (glucose) and oxygen.

Producers

Organisms that can make their own food through photosynthesis. They are the starting point of energy flow in ecosystems.

Chlorophyll

The green pigment found in plants that absorbs light energy for photosynthesis.

Cellular Respiration

The process by which organisms break down sugar (glucose) in the presence of oxygen to release energy for their life processes.

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Consumers

Organisms that cannot make their own food and obtain energy by consuming other organisms.

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What is Photosynthesis?

The process by which plants use light energy to convert carbon dioxide and water into sugar (glucose) and oxygen.

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What are Producers?

Organisms that make their own food through photosynthesis, they are the starting point of energy flow in ecosystems.

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What is Chlorophyll?

The green pigment found in plants that absorbs light energy for photosynthesis.

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What is Cellular Respiration?

The process by which organisms break down sugar (glucose) in the presence of oxygen to release energy for their life processes.

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What are Consumers?

Organisms that cannot make their own food and obtain energy by consuming other organisms.

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What is the Primary Source of Energy for Living Things?

The Sun is the source of almost all the energy living things need to survive. Most of the Sun's energy is radiant energy, which travels through empty space.

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What is the process of Photosynthesis?

The process of converting light energy into chemical energy stored in the form of sugars. This happens in plants.

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What are Autotrophs?

Organisms that can make their own food using energy from the sun are called autotrophs. These organisms are important to energy flow in ecosystems.

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What are Heterotrophs?

Organisms that cannot make their own food and must consume other organisms for energy are called heterotrophs.

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What are the roles of Consumers in an Ecosystem?

Heterotrophs obtain their energy by consuming other organisms. They play a crucial role in energy flow in ecosystems. These organisms are also important for decomposing matter and recycling nutrients in the environment.

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Study Notes

Energy Flow in Ecosystems

  • The Sun is the primary source of energy for living things.
  • Most of the Sun's energy is radiant energy, traveling through empty space.
  • Approximately 30% of the Sun's energy is reflected by clouds or Earth's surface.
  • About 70% is absorbed by the atmosphere, water, and land, converted into thermal energy.
  • A very small amount (0.023%) is absorbed by living organisms.
  • Of the absorbed energy, a tiny fraction is used by plants.

Photosynthesis

  • Some organisms make their own food (autotrophic).
  • Producers, like plants, are autotrophic organisms that make their own food.
  • Photosynthesis is the process that converts light energy into chemical energy.
  • Plants are green due to chlorophyll, which absorbs light energy.

Photosynthesis Reaction

  • Light energy converts carbon dioxide and water into sugar (stored in the plant).
  • Oxygen is released during photosynthesis.
  • Word equation: carbon dioxide + water + light energy → glucose + oxygen

Cellular Respiration

  • Many organisms are consumers (heterotrophic) and obtain energy by eating other organisms.
  • Cellular respiration is the process that releases energy from stored food.
  • In cellular respiration, sugar and oxygen are transformed into carbon dioxide and water.
  • Energy is released during this process.

Cellular Respiration Reaction

  • Word equation: glucose + oxygen → carbon dioxide + water + energy

Complementary Processes

  • Photosynthesis and cellular respiration are opposite reactions that are vital for sustaining life.
  • Both processes are needed for continuous energy flow in ecosystems.

Producers

  • Plants, some producers in Ontario include oak trees, white pines, thistles, white paper birches, columbines, clovers, and algae.

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Related Documents

Lesson 4: Energy Flow in Ecosystems - Photosynthesis and Cellular Respiration - SNC1W - PDF

Description

Explore the fundamentals of energy flow in ecosystems and the processes of photosynthesis and cellular respiration. This quiz covers key concepts including the role of the sun, autotrophic organisms, and the photosynthesis reaction. Test your understanding of how energy is transformed in living systems.

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