Lesson Plan: The Great Fall Foliage Road Trip!

Materials Needed:

• Computer with internet access
• Science notebook or journal
• Pen or pencil
• Leaves from a few different types of trees (e.g., maple, oak, birch - green ones work best for the experiment, but colored ones are great for observation)
• A few small glass jars or cups
• Rubbing alcohol (isopropyl alcohol)
• Coffee filters or paper towels
• A spoon or popsicle stick for crushing leaves
• Colored pencils, markers, or a digital art program
• Optional: Camera or smartphone for creating a video blog

Learning Objectives

By the end of this lesson, Zahra will be able to:

1. Explain the scientific process behind why leaves change color in the fall, identifying the roles of chlorophyll, carotenoids, and anthocyanins.
2. Conduct a paper chromatography experiment to reveal the hidden pigments in a leaf.
3. Apply scientific knowledge to a creative project by designing a "Foliage Road Trip" blog post or video that explains the science to an audience.

Alignment with Standards

This lesson aligns with Middle School Life Science standards, particularly focusing on:

• Photosynthesis: Understanding the role of chlorophyll in capturing sunlight for energy.
• Ecosystems & Environmental Factors: Investigating how organisms (trees) respond to seasonal changes in their environment (less sunlight, colder temperatures).

Lesson Activities & Instructional Strategies

Part 1: Pre-Trip Planning - The "Why" Briefing (20 minutes)

Every great road trip starts with a plan! Our plan is to understand why we're going on this trip in the first place. Why do leaves put on this amazing color show?

1. Activation Question: In your science notebook, write down your current ideas. Why do you think leaves change color in the fall? Is the color already there, or is it new? There are no wrong answers here—it's about getting our initial thoughts down!
2. Research & Discovery: Watch a short, engaging video about the science of fall leaves. A great option is "Why Do Leaves Change Color In The Fall?" by SciShow Kids or a similar video from a science museum.
3. Meet the Pigments: As you watch, listen for three key "characters" in our story. In your notebook, create a profile for each one:
   • Chlorophyll: The Green Machine. (What is its job? Why does it disappear in the fall?)
   • Carotenoids: The Hidden Gold. (What colors are they? Are they always in the leaf?)
   • Anthocyanins: The Red Protector. (What color is it? Why do some trees make it in the fall?)
4. Discussion: Let's talk about it. Based on your research, what is the real reason leaves change color? How did it compare to your initial ideas?

Part 2: The First Stop - A Hands-On Science Souvenir (30 minutes)

We've arrived at our first stop: The Science Lab! We're going to collect a "souvenir" (a leaf) and analyze it to prove that the yellow and orange pigments were hiding there all along. This is called paper chromatography.

1. Collect Your Sample: Go outside and find a green leaf from a tree that you know loses its leaves in the fall (a deciduous tree).
2. Extract the Pigments:
   • Tear the leaf into tiny pieces and put them in a glass jar.
   • Add just enough rubbing alcohol to cover the leaf bits.
   • Carefully use a spoon or stick to mash and crush the leaves into the alcohol for a few minutes. You want the alcohol to turn green. This is your pigment solution!
3. Run the Experiment:
   • Cut a strip from a coffee filter, about 1 inch wide and long enough to reach from the bottom of the jar to the top.
   • Drape the paper strip into the jar so that one end dips into the green alcohol, but the bottom of the strip does not touch the leaf bits. You can fold the top end over the rim of the jar to hold it in place.
   • Wait and Observe! Over the next 20-30 minutes, watch as the alcohol travels up the paper. It will carry the pigments with it, but the lighter pigments (like yellow carotenoids) will travel faster and farther up the paper than the heavier chlorophyll.
4. Analyze Your Souvenir: What do you see? You should see a band of green, and above it, a faint band of yellow or orange. You just proved the hidden colors were there! In your notebook, draw your chromatography strip and label the different color bands.

Part 3: The Main Event - Create Your "Foliage Road Trip" Blog! (45-60 minutes)

Now you're the expert! Your job is to be a science travel blogger or vlogger. Your mission is to create a post or a short video that documents your "road trip" and teaches others the amazing science you've learned. This is where you get to be creative!

Your Blog Post or Video Must Include:

• A Catchy Title: "My Awesome Autumn Adventure!" or "The Secret Science of Fall Colors!"
• An Introduction: Hook your audience! What is your road trip about?
• "Virtual Stops" at Two Different Trees:
  • Stop 1: An Oak or Birch Tree. Explain why its leaves turn yellow or orange. Use the words chlorophyll and carotenoids and explain how your chromatography experiment proved this.
  • Stop 2: A Maple Tree. Explain why its leaves turn a brilliant red. Use the words chlorophyll and anthocyanins. Explain that this red color is special because the tree has to *make* it in the fall.
• Illustrations or Photos: Draw the leaves, show your chromatography experiment, or find pictures online of the trees you're "visiting." If you're making a video, you can be the on-screen host!
• A Fun Conclusion: Summarize what you learned and encourage your "readers" to go on their own fall foliage adventure.

Differentiation and Inclusivity

• For Extra Support: I can provide a simple template for the blog post with sentence starters like, "Did you ever wonder why...? The first reason is..." We can also work together to outline the main points before you start writing.
• For an Extra Challenge (Extension): Let's take it a step further! Research how weather (like a very sunny fall or an early frost) can affect the brightness of fall colors. Add a "Weather Report" section to your blog post explaining your findings. Or, investigate why evergreen trees *don't* lose their needles.

Assessment Methods

• Formative (During the Lesson): I'll check for understanding through our discussion questions in Part 1 and by observing your chromatography experiment and analysis in Part 2.
• Summative (End of Lesson): Your "Foliage Road Trip" blog post or video is the main assessment! It will show me that you can apply the scientific concepts in a creative and accurate way. I'll be looking for:
  1. Correct use of key vocabulary (chlorophyll, carotenoids, anthocyanins).
  2. A clear explanation of why leaves change to yellow/orange versus red.
  3. Creativity and effort in presenting the information.