Gravity Defying Frog

Move the center of gravity of a paper frog to create a gravity defying illusion! How can the frog spin around with most of its body suspended in mid-air? Use moveable weights to discover what forces are needed to keep the frog balanced on its head. Conceal the weights to heighten the mystery!

Grades Covered: K through 8
Subjects Covered: Physical Science

Curriculum topics:
  • Balance
  • Cause and Effect
  • Center of Mass
  • Stable Equilibrium
Standards
Idea Sheets are cross-referenced to subjects listed in the Common Core, Next Generation Science Standards, and California Content Standards.
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National Standards

  • Plan and conduct an investigation to provide evidence of the effects of balanced and unbalanced forces on the motion of an object.

    (Next Generation Science Standards /// Grade 3 /// Physical Science /// Motion and Stability: Forces and Interactions )

  • Support an argument that the gravitational force exerted by Earth on objects is directed down.

    (Next Generation Science Standards /// Grade 5 /// Physical Science /// Motion and Stability: Forces and Interactions)

  • Plan and conduct an investigation to compare the effects of different strengths or different directions of pushes and pulls on the motion of an object.

    (Next Generation Science Standards /// Kindergarten /// Physical Science /// Motion and Stability: Forces and interactions )

  • Analyze data to determine if a design solution works as intended to change the speed or direction of an object with a push or a pull.

    (Next Generation Science Standards /// Kindergarten /// Physical Science /// Motion and Stability: Forces and interactions )

  • Plan an investigation to provide evidence that the change in an object's motion depends on the sum of the forces on the object & the mass of the object.

    (Next Generation Science Standards /// Middle School /// Physical Science /// Motion and Stability: Forces and Interactions )

  • Science and Engineering Practices 1. Asking Questions and Defining Problems 2. Developing and Using Models 3. Planning and Carrying Out Investigations 4. Analyzing and Interpreting Data 5. Using Mathematics and Computational Thinking 6. Constructing Explanations and Designing Solutions 7. Engaging in Argument from Evidence 8. Obtaining, Evaluating, and Communicating Information

    (Next Generation Science Standards /// Kindergarten /// Science and Engineering Practices)

  • Science and Engineering Practices 1. Asking Questions and Defining Problems 2. Developing and Using Models 3. Planning and Carrying Out Investigations 4. Analyzing and Interpreting Data 5. Using Mathematics and Computational Thinking 6. Constructing Explanations and Designing Solutions 7. Engaging in Argument from Evidence 8. Obtaining, Evaluating, and Communicating Information

    (Next Generation Science Standards /// Grade 1 /// Science and Engineering Practices )

  • Science and Engineering Practices 1. Asking Questions and Defining Problems 2. Developing and Using Models 3. Planning and Carrying Out Investigations 4. Analyzing and Interpreting Data 5. Using Mathematics and Computational Thinking 6. Constructing Explanations and Designing Solutions 7. Engaging in Argument from Evidence 8. Obtaining, Evaluating, and Communicating Information

    (Next Generation Science Standards /// Grade 2 /// Science and Engineering Practices)

  • Science and Engineering Practices 1. Asking Questions and Defining Problems 2. Developing and Using Models 3. Planning and Carrying Out Investigations 4. Analyzing and Interpreting Data 5. Using Mathematics and Computational Thinking 6. Constructing Explanations and Designing Solutions 7. Engaging in Argument from Evidence 8. Obtaining, Evaluating, and Communicating Information

    (Next Generation Science Standards /// Grade 3 /// Science and Engineering Practices)

  • Science and Engineering Practices 1. Asking Questions and Defining Problems 2. Developing and Using Models 3. Planning and Carrying Out Investigations 4. Analyzing and Interpreting Data 5. Using Mathematics and Computational Thinking 6. Constructing Explanations and Designing Solutions 7. Engaging in Argument from Evidence 8. Obtaining, Evaluating, and Communicating Information

    (Next Generation Science Standards /// Grade 4 /// Science and Engineering Practices)

  • Science and Engineering Practices 1. Asking Questions and Defining Problems 2. Developing and Using Models 3. Planning and Carrying Out Investigations 4. Analyzing and Interpreting Data 5. Using Mathematics and Computational Thinking 6. Constructing Explanations and Designing Solutions 7. Engaging in Argument from Evidence 8. Obtaining, Evaluating, and Communicating Information

    (Next Generation Science Standards /// Grade 5 /// Science and Engineering Practices)

  • Science and Engineering Practices 1. Asking Questions and Defining Problems 2. Developing and Using Models 3. Planning and Carrying Out Investigations 4. Analyzing and Interpreting Data 5. Using Mathematics and Computational Thinking 6. Constructing Explanations and Designing Solutions 7. Engaging in Argument from Evidence 8. Obtaining, Evaluating, and Communicating Information

    (Next Generation Science Standards /// Middle School /// Science and Engineering Practices)

  • 1.c. The way to change how something is moving is to give it a push or a pull. The size of the change is related to the strength, or the amount of "force," of the push or pull.

    (CA Science /// Grade 2 /// 01. Physical Sciences /// 1. The motion of objects can be observed and measured.)

  • 4. Scientific progress is made by asking meaningful questions & conducting careful investigations. As a basis for understanding this concept, and to address the content of the other strands, students will develop questions & perform investigations.

    (CA Science /// Grade Kindergarten /// 04. Investigation and Experimentation)

  • 5. Scientific progress is made by asking meaningful questions & conducting careful investigations. As a basis for understanding this concept, and to address the content of the other strands, students will develop questions and perform investigations.

    (CA Science /// Grade 3 /// 04. Investigation and Experimentation)

  • 6. Scientific progress is made by asking meaningful questions & conducting careful investigations. As a basis for understanding this concept, and to address the content of the other strands, students will develop questions & perform investigations.

    (CA Science /// Grade 4 /// 04. Investigation and Experimentation)

  • 7. Scientific progress is made by asking meaningful questions & conducting careful investigations. As a basis for understanding this concept, and to address the content of the other strands, students will develop questions & perform investigations.

    (CA Science /// Grade 7 /// 07. Investigation and Experimentation)

  • 2. Unbalanced forces cause changes in velocity.

    (CA Science /// Grade 8 /// 01. Physical Sciences /// 2. Forces)

  • 4. Scientific progress is made by asking meaningful questions and conducting careful investigations. As a basis for understanding this concept and addressing the content in the other three strands, students should develop their own questions and perform investigations. Students will:

    (CA Science /// Grade 1 /// 04. Investigation and Experimentation)

  • 4. Scientific progress is made by asking meaningful questions and conducting careful investigations. As a basis for understanding this concept and addressing the content in the other three strands, students should develop their own questions and perform investigations. Students will:

    (CA Science /// Grade 2 /// 04. Investigation and Experimentation)

  • 6. Scientific progress is made by asking meaningful questions and conducting careful investigations. As a basis for understanding this concept and addressing the content in the other three strands, students should develop their own questions and perform investigations. Student will:

    (CA Science /// Grade 5 /// 04. Investigation and Experimentation)

  • 7. Scientific progress is made by asking meaningful questions and conducting careful investigations. As a basis for understanding this concept and addressing the content in the other three strands, students should develop their own questions and perform investigations. Students will:

    (CA Science /// Grade 6 /// 07. Investigation and Experimentation)

  • 9. Investigation and Experimentation

    (CA Science /// Grade 8 /// 01. Physical Sciences)


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