Grade 3 - Session 10: “Desiging Experiments!”
Architect: Aleeza Ayaz & Shayaan Haider - Markhor3D
Introduction:
These are some suggested experiments that teachers can use to help students explore and learn new concepts in a hands-on way. From measuring temperature changes with friction to observing air expansion when heated, each activity encourages curiosity and understanding of everyday science. With the teacher’s guidance, students will use tools like the temperature probe and sound sensor to make observations, test their predictions, and discover how the world around them works.
1. Temperature in Motion: Measuring Heat from Friction
Session Length: 50 minutes
Learning Objectives:
In this session, students will:
- Understand how friction creates heat.
- Use the temperature probe to measure temperature changes caused by rubbing objects together.
- Observe and discuss how different materials produce different amounts of heat.
- Relate the experiment to everyday experiences with friction and heat.
Teacher Resource:
Equipment Required:
- Temperature probe connected to MeasureLab.
- A set of small objects with different surfaces (e.g., sandpaper, smooth plastic, cloth).
- Weights or objects to apply pressure.
- Worksheet for recording temperature changes.
Introduction and Hands-On Exploration (30-35 minutes):
-
Introduction to Friction and Heat:
- You may ask:
“Have you ever noticed that when you rub your hands together, they get warmer? Why do you think that happens?” - Let students share their ideas about friction and heat. Explain that today, they’ll be rubbing different materials together to see how much heat is created.
- You may ask:
-
Measuring Temperature Before Rubbing:
- Students will use the temperature probe to measure the temperature of different objects before they rub them together. Record the starting temperature on the worksheet.
-
Creating Friction:
- Students will rub pairs of objects together for 20 seconds. Examples include rubbing sandpaper and cloth or smooth plastic.
- You may ask:
“What do you think will happen to the temperature when we rub these materials together?”
-
Measuring Temperature After Rubbing:
- Use the temperature probe to measure the temperature again after rubbing. Students will record how much the temperature increased due to friction.
Data Table:
| Object Pair | Starting Temperature (°C) | Temperature After Rubbing (°C) | Difference (°C) |
|---|---|---|---|
| Sandpaper and cloth | |||
| Smooth plastic and cloth |
Guided Activity and Discussion (15-20 minutes):
-
Observing Results:
- You may ask:
“What happened to the temperature after you rubbed the materials together? Did it go up? Why?” - Explain that friction creates heat energy when two surfaces rub against each other.
- You may ask:
-
Real-Life Connection:
- You may explain:
“This is the same reason your hands get warm when you rub them together or why a car’s tires get hot after driving. Friction creates heat!”
- You may explain:
2. “Hot Air Balloon: Expansion of Air”
Session Length: 50 minutes
Learning Objectives:
In this session, students will:
- Explore how air expands when heated.
- Use a temperature probe to measure the heat and observe how it affects the expansion of air in a balloon.
- Understand the concept of expansion and how warm air rises.
- Relate this experiment to real-life examples like hot air balloons.
Teacher Resource:
MeasureLab Manual [link]
Equipment Required:
- Temperature probe connected to MeasureLab.
- A balloon or small plastic bag.
- Hot water bath or hair dryer (for heating the air inside the balloon).
- Lab weights to put on the LoadCell to measure weight change.
- Worksheet for recording temperature changes.
Introduction and Hands-On Exploration (30-35 minutes):
-
Introduction to Air and Expansion:
- You may ask:
“Have you ever seen a hot air balloon? What makes it float up into the sky?” - Let students share their ideas about hot air balloons. Explain that today, they’ll see how air expands and rises when it’s heated.
- You may ask:
-
Measuring Temperature Before Heating:
- Students will use the temperature probe to measure the temperature of the air inside a balloon or plastic bag before heating. Record the starting temperature.
-
Heating the Air:
- Place the balloon or bag over a hot water bath or use a hair dryer to heat the air inside it.
- You may ask:
“What do you think will happen when we heat the air inside the balloon?”
-
Observing Expansion:
- As the air heats up, observe how the balloon or bag expands and rises slightly. Measure the temperature again to see how much it increased.
Data Table:
| Starting Temperature (°C) | Temperature After Heating (°C) | Observation (Did the weight Reduce?) |
|---|---|---|
Guided Activity and Discussion (15-20 minutes):
-
Observing Results:
- You may ask:
“What happened to the balloon when we heated the air inside? Did it get bigger?” - Explain that warm air expands and rises because the particles move faster and spread out.
- You may ask:
-
Real-Life Connection:
- You may explain:
“This is how hot air balloons work! The air inside the balloon gets hot, it expands, and that makes the balloon float up.”
- You may explain:
3. Cold Contact: Heart Rate Drop with Cold Water
Session Length: 50 minutes
Learning Objectives:
In this session, students will:
- Observe how heart rate changes when exposed to cold water.
- Use a pulse sensor to measure heart rate before and after contact with cold water.
- Understand how the body reacts to cold stimuli by slowing down heart rate.
- Explore the connection between temperature and heart rate in a fun, safe way.
Teacher Resource:
MeasureLab Manual [link]
Equipment Required:
- Pulse sensor connected to MeasureLab.
- Cold water in a container.
- Timer or stopwatch.
- Worksheet for recording heart rate.
Introduction and Hands-On Exploration (30-35 minutes):
-
Introduction to Heart Rate and Cold:
- You may ask:
“What happens to your body when you touch something really cold? Do you feel any changes?” - Let students share their ideas. Explain that today, they’ll see how their heart rate changes when they touch cold water.
- You may ask:
-
Measuring Heart Rate Before Cold Contact:
- Students will measure their resting heart rate using the pulse sensor and record it on the worksheet.
-
Contact with Cold Water:
- Have students gently place their hands in a container of cold water for 20-30 seconds.
- You may ask:
“What do you think will happen to your heart rate when your hands are in the cold water?”
-
Measuring Heart Rate After Cold Contact:
- Measure their heart rate again after exposure to cold water and compare it to the resting heart rate.
Data Table:
| Condition | Heart Rate (bpm) |
|---|---|
| Before Cold Water | |
| After Cold Water |
Guided Activity and Discussion (15-20 minutes):
-
Observing Results:
- You may ask:
“What happened to your heart rate after touching the cold water? Did it go up or down?” - Explain that cold temperatures can cause the heart rate to slow down, as the body conserves energy in response to the cold.
- You may ask:
-
Real-Life Connection:
- You may explain:
“This is why you might feel your heart beating slower when you’re outside in the cold or after you’ve been swimming in cold water.”
- You may explain:
4. “Wind Chill: The Effect of Moving Air on Temperature”
Session Length: 50 minutes
Learning Objectives:
In this session, students will:
- Understand how moving air affects the cooling of objects.
- Use a temperature probe to measure temperature changes with and without wind (fan).
- Learn about the wind chill effect and how moving air makes things feel colder.
- Apply these concepts to real-life situations, like feeling colder on windy days.
Teacher Resource:
MeasureLab Manual [link]
Equipment Required:
- Temperature probe connected to MeasureLab.
- Fan (to create wind).
- Warm water in a container.
- Worksheet for recording temperature changes.
Introduction and Hands-On Exploration (30-35 minutes):
-
Introduction to Wind and Cooling:
- You may ask:
“Have you ever noticed that it feels colder when the wind blows, even if the temperature stays the same?” - Let students share their experiences with wind. Explain that today, they’ll see how moving air makes things cool down faster.
- You may ask:
-
Measuring Temperature Without Wind:
- Use the temperature probe to measure the temperature of the warm water without the fan blowing. Record the temperature.
-
Measuring Temperature With Wind:
- Turn on the fan and aim it at the container of water. Measure the temperature at intervals to see how the moving air cools the water faster.
- You may ask:
“What do you think will happen to the temperature when we blow wind over the water?”
Data Table:
| Time (Minutes) | Temperature Without Wind (°C) | Temperature With Wind (°C) |
|---|---|---|
| 0 (Start) | ||
| 2 | ||
| 4 |
Guided Activity and Discussion (15-20 minutes):
-
Observing Results:
- You may ask:
“What happened to the temperature with the fan blowing? Did it cool down faster?” - Explain that moving air makes things cool down faster, just like the wind chill effect we feel on cold, windy days.
- You may ask:
-
Real-Life Connection:
- You may explain:
“This is why you feel colder when the wind is blowing, even if the temperature hasn’t changed. The wind helps your body lose heat faster.”
- You may explain:
5. “How Does Salt Affect Ice?” - Measuring Temperature Changes with a Temperature Probe
Session Length: 50 minutes
Objective:
Students will explore how adding salt to ice affects the temperature and the melting rate of ice. Using the temperature probe, students will measure the temperature changes and observe how salt lowers the freezing point of water.
Materials:
- Temperature probe connected to MeasureLab.
- Ice cubes.
- Salt (regular table salt).
- Two small containers or beakers.
- Spoon for adding and stirring salt.
- Worksheet for recording temperature readings.
Introduction and Hands-on Exploration:
- Introduction to Ice and Melting:
- You may ask:
“Have you ever seen people sprinkle salt on icy roads in winter? Why do you think they do that?” - Let students share their ideas about melting and salt. Explain that today, they’ll see what happens to the temperature of ice when salt is added.
- Setting Up the Experiment:
- Prepare two containers: one with ice cubes only and one with ice cubes and salt.
- Have students predict which container will cause the ice to melt faster or change temperature more quickly.
- Measuring Initial Temperature:
- Use the temperature probe to measure the starting temperature of the ice in both containers. Record the initial temperature on the worksheet.
- Adding Salt to One Container:
- Add a spoonful of salt to one of the containers and stir. Leave the other container with just ice.
- You may ask:
“What do you think will happen to the temperature when we add salt to the ice? Will the ice melt faster?”
- Monitoring Temperature Over Time:
- Use the temperature probe to measure the temperature in both containers at regular intervals (e.g., every 2 minutes). Record how the temperature changes over time.
Data Table:
| Time (Minutes) | Ice Only (°C) | Ice + Salt (°C) |
|---|---|---|
| 0 (Start) | ||
| 2 | ||
| 4 | ||
| 6 | ||
| 8 |
Discussion:
- Observing the Temperature Drop:
- You may ask:
“What happened to the temperature of the ice when we added salt? Did it drop faster than the ice without salt?” - Explain that adding salt lowers the freezing point of water, which causes the ice to melt faster and cool the surrounding water even more.
- Real-Life Connection:
- You may explain:
“This is why people put salt on icy roads in the winter—it helps melt the ice faster and makes the roads safer. Salt lowers the temperature at which ice melts.”
6. 3D-Printed Acoustic Chambers: Testing Sound Reflection and Absorption
Session Length: 50 minutes
Learning Objectives:
In this session, students will:
- Explore how sound behaves in different 3D-printed acoustic chambers.
- Use the sound sensor to measure sound reflection and absorption in different chamber designs.
- Understand how shape and material affect sound waves, including reflection, absorption, and amplification.
- Relate the experiment to real-world applications like soundproofing, theater acoustics, and microphones.
Teacher Resource:
MeasureLab Manual [link].
Teachers’ Guide to TinkerCad [link].
Getting Started with M3D Enabler [link].
Equipment Required:
- 3D-printed acoustic chambers with different shapes and sizes (designed by students in Tinkercad).
- A 3D printer to print out the acoustic chambers.
- Sound sensor connected to MeasureLab to measure sound intensity.
- Sound source (e.g., speaker or bell).
- Worksheet for recording sound levels.
Introduction and Hands-On Exploration (30-35 minutes):
- Introduction to Sound and Chambers:
- You may ask:
“Have you ever noticed how sound echoes in some places, like a gym or empty room, but it’s quieter in a place with lots of furniture or carpets? Why do you think that happens?” - Let students share their thoughts. Explain that today, they’ll design acoustic chambers to see how sound behaves in different shapes.
- Designing and Testing Acoustic Chambers:
- Students will design or use pre-made 3D-printed acoustic chambers of different shapes (e.g., cubes, cones, open or closed designs).
- You may ask:
“Which chamber do you think will reflect sound the most? Which one will absorb sound better?”
- Measuring Sound Levels:
- Place the sound sensor inside each chamber and play a sound nearby. Students will measure the sound levels in each chamber and record how the shape and design affect the sound.
- You may ask:
“Which chamber made the sound louder or quieter? Why do you think that happened?”
Data Table:
| Chamber Shape | Sound Level (dB) |
|---|---|
| Open Cube | |
| Closed Cone | |
| Open Cylinder |
Guided Activity and Discussion (15-20 minutes):
- Observing Results:
- You may ask:
“Which chamber made the sound louder or quieter? Did any chamber create an echo?” - Explain that certain shapes, like cones or open spaces, amplify or reflect sound, while others absorb it.
- Real-Life Connection:
- You may explain:
“This is how theaters and concert halls are designed. The walls and ceilings are shaped to make the sound clear and loud for everyone in the audience.”
Glossary :
- Friction: The force that happens when two objects rub against each other, creating heat.
- Temperature: A measure of how hot or cold something is.
- Temperature Probe: A tool that measures the temperature of objects or substances.
- Heat Energy: The energy that comes from heat, often produced by friction or other forces.
- Surface: The outside part or layer of an object where rubbing or friction occurs.
- Expansion: When something gets bigger because it’s heated, like air in a balloon.
- Air Particles: Tiny, invisible pieces that make up air, which move faster when heated.
- Temperature Probe: A tool used to measure the temperature of the air or objects.
- Hot Air Balloon: A large balloon filled with heated air that rises because warm air is lighter than cold air.
- Heat: The energy that makes things warmer, causing particles to move faster and spread out.
- Heart Rate: The number of times your heart beats in one minute (measured in beats per minute or bpm).
- Pulse Sensor: A device used to measure heart rate by detecting the pulse in your body.
- Cold Water: Water that has a low temperature, often causing the body to react by slowing down the heart rate.
- Stimulus: Something that causes a reaction, like cold water on the skin.
- Body Response: How your body reacts to things like cold or exercise, such as changes in heart rate.
- Wind Chill: The cooling effect of wind, which makes things feel colder than they are.
- Temperature: A measure of how hot or cold something is.
- Temperature Probe: A tool used to measure the temperature of objects or liquids.
- Fan: A machine that blows air, creating wind to cool things down.
- Cooling: The process of becoming colder, which can happen faster with moving air or wind.
- Sound: Vibrations that travel through air or other materials, which we hear as noise.
- Soundproofing: The process of stopping or reducing sound from passing through a material.
- Sound Sensor: A device that measures the loudness of sounds in decibels (dB).
- Absorption: When a material takes in sound waves, reducing the amount of sound that passes through.
- Barrier: An object or material that blocks sound, such as foam or fabric.
Conclusion:
We hope that through these fun and interactive experiments, students have gained a new appreciation for how science can help us explore and understand the world around us. By using sensors to measure things like force, motion, light, and sound, we’ve shown that even everyday activities like jumping or listening to sounds can be scientifically observed and analyzed.
We believe that these hands-on experiences will inspire students to get curious, creative, and excited about science. We encourage them to think like young scientists, asking questions and using tools like sensors to discover new things. Our goal is that this session not only teaches them important concepts but also sparks a lifelong love of learning and exploring the wonders of the world around them.