Newton's Third Law of Motion
Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
Key Concepts
- Every action has an equal and opposite reaction.
- Forces always occur in pairs.
- The two forces act on different objects.
Examples
Some everyday examples of Newton's third law include:
- When you push against a wall, the wall pushes back with an equal force.
- When you jump off a boat, your push on the boat propels you in the opposite direction.
- When a rocket engine expels gas in one direction, the rocket is propelled in the opposite direction.
Study Guide
To better understand Newton's third law, consider the following questions:
- What is Newton's third law of motion?
- How does Newton's third law apply to everyday situations?
- Can you think of examples where you experience the equal and opposite reaction in your daily life?
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.◂Science Worksheets and Study Guides Third Grade. Relationships among living things
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Relationships among living things 
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Relationships among living things Worksheet/Answer key
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Relationships among living things Vocabulary/Answer key
Relationships among living things
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
From Molecules to Organisms: Structures and Processes
Create representations to explain the unique and diverse life cycles of organisms other than humans (e.g., flowering plants, frogs, butterflies), including commonalities such as birth, growth, reproduction, and death.
Unity and Diversity
Construct an argument from evidence to explain the likelihood of an organism’s ability to survive when compared to the resources in a certain habitat (e.g., freshwater organisms survive well, less well, or not at all in saltwater; desert organisms survive well, less well, or not at all in woodlands).
Create models that illustrate how organisms and their habitats make up a system in which the parts depend on each other.