Science Buddies: "Ask an Expert"

We are working on the experiment called "Toxic trees: Just how toxic is that Black Walnut tree?". The procedure says to use 20 black walnut leaves to make the solution. Does this mean 20 whole leaf stem bunches or 20 individual leaves? In the background info of the experiment, it shows a pictures and calls the entire leaf stem a "leaf" and the individual leaves are called "leaflets". Just need clarification on how much goes into the solution - 20 bunches, or 20 individual leaves.

Hello,

First of all, thank you for using SciBuddies for your project. Based on your information and the procedure from the experiment page:
https://www.sciencebuddies.org/science- ... #procedure
It looks like it is referring to the entire leaf stems, so there should be more than 20 "leaflets" (as they call it) in your juglone solution.
Although you can probably record the same results either way.

Hello!

Looking at the materials page of the project you are working on, it looks like 60 leaflets are needed for your project. The leaflets are the individual leaves that make up the leaf (bunch of leaves attached to the single branch) that you see pictured on the “background” page of the link to your project.

So, make sure to collect 60 individual leaves for this project.

Here’s the link to your project where I found this information:

https://www.sciencebuddies.org/science- ... background

Hope this helps and feel free to reach out with additional questions!
-cnoonan180