Beat the Heat: Animal & Human Cool-Down Science

In our "Beat the Heat" episode, we explored the clever ways animals and humans stay cool when the sun is shining bright. Now, it's your turn to become a heat-busting scientist and investigate how different surfaces absorb and release heat!

The Big Question

How do different colors and materials affect how hot something gets in the sun?

What You'll Need

• 3 small containers (like yogurt cups or shallow bowls)
• Black construction paper
• White construction paper
• Aluminum foil
• Water
• A sunny spot outside
• A thermometer (optional, but fun!)

Mission Steps

1. Prepare Your Surfaces. Line the inside of each container with a different material: one with black paper, one with white paper, and one with aluminum foil.
2. Add Some Water. Pour a small amount of water into each container, just enough to cover the bottom.
3. Sunbathe Your Samples. Place all three containers in a sunny spot outside. Leave them for at least 30 minutes.
4. Observe the Heat. Carefully touch the outside of each container. Which one feels the warmest? If you have a thermometer, you can carefully measure the water temperature in each container.

Talk About It

• Which container felt the warmest/had the hottest water? Which felt the coolest?
• Why do you think some materials got hotter than others?
• How might animals use what we learned today to stay cool in the sun?

Take It Further

For older rangers, try researching how different colored clothing affects how hot a person feels. You could even set up a similar experiment using dark and light-colored fabrics to see which absorbs more heat.

FAQ

Q: Is it safe to leave water outside in the sun? A: Yes, as long as it's in a clean container and you are supervising. The water will get warm, but it's not a safety concern for this experiment. Q: What if it's not a sunny day? A: You can use a strong lamp as a heat source. Place the lamp a consistent distance above your containers to simulate the sun's rays.