Valentina’s Motion Mission: Newton’s Three Laws

Materials Needed

• A toy car, small ball, or block
• A balloon
• String, about 1 meter long
• Drinking straw
• Tape
• Several books or small objects with different weights
• A smooth surface, such as a table or floor
• Paper and pencil or crayons
• Optional: stopwatch, measuring tape, and a paper plate

Lesson Overview

Learner: Valentina, age 8

Suggested time: 60–75 minutes

Big idea: Pushes and pulls can change how things move.

Learning Objectives

By the end of the lesson, Valentina will be able to:

• Name and explain Newton’s three laws of motion using simple words.
• Identify pushes, pulls, forces, motion, and friction in everyday examples.
• Perform simple experiments that show each law of motion.
• Record observations and explain what happened using evidence.
• Design or describe a real-life example of one of the laws.

Success Criteria

Valentina is successful if she can:

• Explain each law in her own words.
• Give at least one everyday example for each law.
• Make a prediction before an experiment.
• Describe what happened and why.
• Use the words force, motion, push, pull, and friction correctly.

Key Vocabulary

Motion

Movement from one place to another.

Force

A push or a pull.

Friction

A force that slows things down when surfaces rub together.

Mass

How much matter is in an object. We often think of it as how heavy something is.

Introduction: The Motion Mystery

Hook: Ask Valentina:

“Why does a toy car start moving when you push it? Why does it stop? Why does a balloon fly across the room when air rushes out?”

Tell Valentina:

“Today you are a Motion Detective. You will investigate three rules discovered by a scientist named Sir Isaac Newton. These rules help explain roller coasters, bicycles, soccer balls, rockets, and even the way we walk.”

Quick prediction: Have Valentina draw or describe what she thinks will happen when:

• A toy car is pushed gently.
• The same car is pushed harder.
• A heavy book and a light book are pushed with the same amount of force.

Body: Explore Newton’s Laws

Part 1: I Do — Newton’s First Law

Newton’s First Law: An object that is still tends to stay still. An object that is moving tends to keep moving unless a force changes it.

Child-friendly explanation:

“Things do not start, stop, or turn by themselves. They need a push or a pull.”

Demonstration: The Toy Car Stop

1. Place the toy car on a smooth surface.
2. Ask Valentina to notice that it stays still.
3. Push the car gently and watch it move.
4. Let it roll until it stops.
5. Ask, “What force made the car start? What made it stop?”

Expected idea: The push made the car move. Friction between the car and the surface helped slow it down and stop it.

Everyday examples:

• A soccer ball stays still until someone kicks it.
• A swing stays still until someone pushes it.
• A bicycle keeps moving until the rider brakes or friction slows it.

Quick check: Ask, “What force would make a still ball move?”

Part 2: We Do — Newton’s Second Law

Newton’s Second Law: A stronger push or pull causes a bigger change in motion. Heavier objects usually need more force to move.

Child-friendly explanation:

“A harder push can make something speed up more. A heavier object is harder to move.”

Experiment: Push Power

1. Place the toy car on a smooth surface.
2. Valentina predicts what will happen with a gentle push.
3. Give the car a gentle push and observe how far it travels.
4. Repeat with a stronger push.
5. Compare the two results.

Ask:

• Which push made the car travel farther?
• Which push made the car move faster?
• What happened when the force became stronger?

Experiment: Light Load and Heavy Load

1. Push the empty toy car gently.
2. Place one small book or object on the car, if it is safe and stable.
3. Push the loaded car with about the same amount of force.
4. Compare how easily the cars moved.

Expected idea: The loaded car may move more slowly or need a stronger push because it has more mass.

Real-life connection: It takes more effort to push an empty shopping cart than a shopping cart full of groceries.

Part 3: We Do — Newton’s Third Law

Newton’s Third Law: When one object pushes another object, the second object pushes back.

Child-friendly explanation:

“Every push has a push back.”

Experiment: Balloon Rocket

1. Thread the string through the straw.
2. Tie or hold the string so it is straight and level.
3. Blow up the balloon, but do not tie it.
4. Tape the balloon to the straw with the balloon opening pointing backward.
5. Release the balloon and watch it move along the string.

Ask:

• Which way did the air move?
• Which way did the balloon move?
• What pushed the balloon forward?

Expected idea: Air rushed backward, and the balloon moved forward. The air pushed one way, and the balloon pushed back the other way.

Everyday examples:

• When you jump, your feet push down on the ground and the ground pushes you up.
• When you swim, your hands and feet push water backward, and your body moves forward.
• A rocket pushes gas downward, and the rocket moves upward.

Part 4: You Do — Motion Detective Challenge

Invite Valentina to choose one challenge:

1. Law One Challenge: Find three objects that are still. Explain what push or pull could make each one move.
2. Law Two Challenge: Test how gently and strongly pushing a toy car changes its movement. Record which push makes it travel farther.
3. Law Three Challenge: Build and test the balloon rocket. Change one feature, such as the amount of air or the length of the string, and observe what happens.

Investigation recording format:

• My question: What am I testing?
• My prediction: What do I think will happen?
• What I did: What steps did I follow?
• What I observed: What happened?
• My explanation: Which law of motion explains the result?

Interactive Review Game: “Which Law?”

Read each situation aloud. Valentina holds up one finger for the First Law, two fingers for the Second Law, or three fingers for the Third Law.

1. A ball stays on the ground until someone kicks it. Answer: First Law
2. A harder push makes a toy car move faster. Answer: Second Law
3. A swimmer pushes water backward and moves forward. Answer: Third Law
4. A bicycle slows down when the rider uses the brakes. Answer: First Law
5. A full wagon is harder to pull than an empty wagon. Answer: Second Law
6. Air moves backward, and a balloon flies forward. Answer: Third Law

Application Activity: Design a Motion Machine

Ask Valentina to draw or build a simple machine that uses one or more laws of motion. Ideas include:

• A balloon-powered car
• A marble ramp
• A toy parachute
• A mini roller coaster for a toy car
• A launch system for a paper ball

She should label:

• Where the push or pull happens
• How the object moves
• Which law or laws are being used

Choice option: Valentina may draw the design, build it with household materials, or explain it aloud if building materials are unavailable.

Assessment

Formative Assessment

• Listen to Valentina’s predictions before each experiment.
• Ask her to explain what caused an object to start, stop, speed up, or move in another direction.
• Check whether she uses the vocabulary words correctly.
• Review her investigation notes and ask, “What evidence supports your answer?”

Summative Assessment: Motion Mission Report

Ask Valentina to complete these prompts orally or in writing:

1. Newton’s First Law means ____________________________________.
2. Newton’s Second Law means __________________________________.
3. Newton’s Third Law means ___________________________________.
4. One example of the First Law is ______________________________.
5. One example of the Second Law is ____________________________.
6. One example of the Third Law is ______________________________.
7. The most surprising experiment was __________________ because __________________.

Simple Rubric

Skill	Getting Started	Almost There	Mission Complete
Explains the laws	Needs help explaining the laws.	Explains some laws correctly.	Explains all three laws in her own words.
Uses evidence	Shares an observation with help.	Describes some results.	Uses observations to explain what happened.
Applies learning	Identifies a few examples.	Identifies examples with some support.	Connects the laws to real-life situations or a design.

Differentiation and Adaptations

Support for a Learner Who Needs More Help

• Use gestures: hold still for the First Law, push hands forward for the Second Law, and push hands in opposite directions for the Third Law.
• Use sentence starters such as, “The car moved because…” and “The balloon went forward because…”
• Focus on one law at a time instead of all three in one session.
• Allow drawing, pointing, acting, or speaking instead of writing full sentences.

Extension for a Learner Ready for More

• Test the toy car on different surfaces and investigate friction.
• Measure how far the car travels after gentle, medium, and strong pushes.
• Change only one feature of the balloon rocket and explain how it affected the result.
• Research how seat belts use Newton’s First Law to keep passengers safer.

Conclusion: Tell What We Learned

Ask Valentina to complete the following recap:

• “Newton’s First Law is about objects staying still or keeping moving.”
• “Newton’s Second Law is about how force and mass change motion.”
• “Newton’s Third Law says every push has a push back.”

Final reflection questions:

1. Which law was easiest to understand? Why?
2. Which experiment gave the clearest evidence?
3. Where might you see Newton’s laws today—in a playground, kitchen, road, or sport?

Takeaway: Motion is all around us. Pushes and pulls help objects start, stop, speed up, slow down, and change direction.