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Grade 6 Science · Organisms and Body Systems

Grade 6 Organisms and Body Systems Practice Test

Build Grade 6 Science skills with five 10-question practice tests on levels of organization, body systems, circulation, respiration, digestion, the nervous system, movement, immunity, and homeostasis.

Organisms and Body Systems Practice Tests

These Grade 6 Science practice tests help students understand how cells, tissues, organs, organ systems, and organisms are organized. Students practice the functions and interactions of the circulatory, respiratory, digestive, nervous, skeletal, muscular, urinary, and immune systems.

Skills covered

  • Explaining levels of organization in multicellular organisms
  • Connecting organs and systems with their functions
  • Describing circulation, respiration, digestion, and waste removal
  • Understanding nervous system responses and body movement
  • Explaining immune defenses and homeostasis
  • Analyzing how body systems depend on one another

How to use these practice tests

For each question, identify the function first and then match it to the organ or system that performs it. Study body systems as connected networks: oxygen and nutrients move through the circulatory system, signals coordinate responses, and several systems work together to maintain homeostasis.

For more Grade 6 Science practice, return to the Grade 6 Science category.

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Grade 6 Organisms and Body Systems Practice Tests

A 10-question Grade 6 Science practice test on levels of organization, body systems, circulation, respiration, digestion, the nervous system, movement, immunity, and homeostasis.

Identify the system responsible for each function, connect organs with their roles, and explain how body systems interact to maintain life and balance.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

Which body system helps remove wastes from the blood?

Please select an answer first.

Correct answer: A

The correct answer is The urinary system.

  1. Identify the body system: Determine which organ or system performs the function described in the question.
  2. Connect structure and function: The urinary system filters blood and removes certain wastes in urine.
  3. Check the interaction: Consider how the system works with other systems to keep the organism alive and balanced.

The urinary system filters blood and removes certain wastes in urine.

2. QuestionMultiple choice

What is the function of the kidneys?

Please select an answer first.

Correct answer: B

The correct answer is They filter the blood and help regulate water and dissolved substances..

  1. Identify the body system: Determine which organ or system performs the function described in the question.
  2. Connect structure and function: Kidneys remove wastes and help maintain a stable internal fluid balance.
  3. Check the interaction: Consider how the system works with other systems to keep the organism alive and balanced.

Kidneys remove wastes and help maintain a stable internal fluid balance.

3. QuestionMultiple choice

How does the respiratory system help remove a waste product?

Please select an answer first.

Correct answer: C

The correct answer is It removes carbon dioxide when a person exhales..

  1. Identify the body system: Determine which organ or system performs the function described in the question.
  2. Connect structure and function: Carbon dioxide produced by cells is transported to the lungs and breathed out.
  3. Check the interaction: Consider how the system works with other systems to keep the organism alive and balanced.

Carbon dioxide produced by cells is transported to the lungs and breathed out.

4. QuestionMultiple choice

What is a response to a stimulus?

Please select an answer first.

Correct answer: D

The correct answer is A change in activity caused by information from the environment or inside the body.

  1. Identify the body system: Determine which organ or system performs the function described in the question.
  2. Connect structure and function: A response is an action or change that follows a detected stimulus.
  3. Check the interaction: Consider how the system works with other systems to keep the organism alive and balanced.

A response is an action or change that follows a detected stimulus.

5. QuestionMultiple choice

Which example shows a response to an internal stimulus?

Please select an answer first.

Correct answer: A

The correct answer is The body releases insulin when blood glucose rises after a meal..

  1. Identify the body system: Determine which organ or system performs the function described in the question.
  2. Connect structure and function: Rising blood glucose is an internal change that triggers a body response.
  3. Check the interaction: Consider how the system works with other systems to keep the organism alive and balanced.

Rising blood glucose is an internal change that triggers a body response.

6. QuestionMultiple choice

Why is oxygen needed by many body cells?

Please select an answer first.

Correct answer: B

The correct answer is Cells use oxygen to help release usable energy from food..

  1. Identify the body system: Determine which organ or system performs the function described in the question.
  2. Connect structure and function: Cellular respiration uses oxygen to help release energy for cell activities.
  3. Check the interaction: Consider how the system works with other systems to keep the organism alive and balanced.

Cellular respiration uses oxygen to help release energy for cell activities.

7. QuestionMultiple choice

How does the body maintain a stable temperature on a cold day?

Please select an answer first.

Correct answer: C

The correct answer is It can reduce heat loss and increase heat production through responses such as shivering..

  1. Identify the body system: Determine which organ or system performs the function described in the question.
  2. Connect structure and function: Responses such as shivering and narrowed blood vessels help conserve or produce heat.
  3. Check the interaction: Consider how the system works with other systems to keep the organism alive and balanced.

Responses such as shivering and narrowed blood vessels help conserve or produce heat.

8. QuestionMultiple choice

Why do several body systems work together during running?

Please select an answer first.

Correct answer: D

The correct answer is Muscles need oxygen and nutrients, while waste products and heat must be transported or removed..

  1. Identify the body system: Determine which organ or system performs the function described in the question.
  2. Connect structure and function: Running increases the demands on muscular, respiratory, circulatory, nervous, and other systems.
  3. Check the interaction: Consider how the system works with other systems to keep the organism alive and balanced.

Running increases the demands on muscular, respiratory, circulatory, nervous, and other systems.

9. QuestionMultiple choice

Which statement best describes interdependence among body systems?

Please select an answer first.

Correct answer: A

The correct answer is A change in one system can affect the functions of other systems..

  1. Identify the body system: Determine which organ or system performs the function described in the question.
  2. Connect structure and function: Body systems exchange materials and information, so they depend on one another.
  3. Check the interaction: Consider how the system works with other systems to keep the organism alive and balanced.

Body systems exchange materials and information, so they depend on one another.

10. QuestionMultiple choice

Which complete plan would best help a student study body systems?

Please select an answer first.

Correct answer: B

The correct answer is Match each system with its organs, main function, materials exchanged, and interactions with other systems..

  1. Identify the body system: Determine which organ or system performs the function described in the question.
  2. Connect structure and function: Connecting structures, functions, and interactions gives a complete understanding of body systems.
  3. Check the interaction: Consider how the system works with other systems to keep the organism alive and balanced.

Connecting structures, functions, and interactions gives a complete understanding of body systems.

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Frequently asked questions about Grade 6 Organisms and Body Systems

What topics are covered?

The page covers levels of organization, circulation, respiration, digestion, the nervous system, skeletal and muscular systems, immunity, urinary function, system interactions, and homeostasis.

How should students study body systems?

Match each system with its organs and functions, then review how systems exchange materials and information during activities such as exercise, digestion, and immune responses.

How many questions are on this page?

The page includes five mini tests with 10 questions each, for 50 Grade 6 Organisms and Body Systems questions in total.