100 Days of Science #50-- Fall Leaf Chromatography

We were lucky to squeeze in one final fall science experiment before our trees lost all their leaves.  We took a few minutes one morning to walk around the yard and find leaves in red, orange, yellow, and green; just picking a few of each.  



We wanted leaves fresh from the trees because we knew they would work better.   


We sorted the leaves by color and broke them up into tiny pieces; placing each color in their own jar.



We then took a spoon and used the flat side to crush the leaves; trying to release some of the color before we added some rubbing alcohol to each jar.


We added just enough rubbing alcohol to cover our leaves and then put a lid on them (cling wrap would work great too).


We then put the glass jars in a larger pan and added HOT water to the outer pan.  Basically we wanted to warm up the alcohol to help speed up the process of drawing out the various chemicals that make the leaves the colors they appear.



We set it aside on the counter for a few hours and let the water cool off completely.  We then removed the lids and made sure we had colored alcohol puddles.  (If we didn't I would have added another batch of water and let them sit overnight).

We then cut up strips of coffee filter and put one strip in each jar.


After just an hour or so we could see the colors being drawn up.



We left them sitting overnight so we would see a more dramatic effect the next day.





When our papers dried they looked like this!






We talked about how leaves always have all of these chemicals inside them but the green (chlorophyll) overtakes the leaves in spring and summer because the plant is busy making lots and lots of food.  In the fall the plant isn't working on food production and the other colors become visible.


Others in this series:

1. Bernoulli's Principle
2. Ecotarium Trip 
3. Air Molecule Experiment
4. Kitchen Science
5. Corn Maze Field Trip 
6. Birds of Florida 
7. Making Static Music
8. Un-Make It Monday
9. Wind Tunnel Experiment
10. Biomes Field Trip
11. Disappearing Coin Trip
12. Snuffing out a Candle With Baking Soda
13. Making Plastic from Milk
14. Friction Experiment 
15. & 16. Snow Experiments
17. Making an Iceberg
18. Floating Eggs
19. Pond Water Under a Microscope 
20. Planting Eco Plant Pals
21. & 22. Cotton Candy Experiments
23. Springfield Science Museum Trip
24. Signs of Spring
25. Color Changing Slime
26. Growing Our Own Tickle Plants
27. Learning About Soil Sampling
28. Making Bouncy Balls
29. Exploring the Shoreline
30. Color Changing Flowers
31. Roger Williams Zoo Trip
32. Edible Silly Putty 
33. Raising Tadpoles
34. More Microscope Fun 
35.  Homemade Ice Cream
36. How Plants Breathe Experiment 
37. Save The Bay Exploration Center Trip
38. Making Fresh Peach Preserves 
39. Making Solar S'mores
40. Growing a Crystal Garden
41. & 42. Making Jolly Rancher Candy Apples & Lollipops 
43. Volcanic Lemons
44. Oozing Pumpkins
45.  Growing a Germ Farm
46. Germs Under a Microscope
47. & 48. Making Model Molecules Two Ways
49. Kitchen Chemistry

Comments

  1. Jennifer HumphriesNovember 20, 2018 at 12:02 AM

    This is super cool! We have very little Fall here in Southern Az, but I could always have family ship in leaves :)

    ReplyDelete
    Replies
    1. Mother of 3November 20, 2018 at 2:49 PM

      Thank you! I bet it would work as long as the leaves don't get too dried out in transport.

      Delete

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