Welcome to Science buddies! I assume you are doing this project below?http://www.sciencebuddies.org/science-f ... background
You asked how to do the experiment? Read the section "procedure" under that topic. This will tell you how to do it. We can help you with certain steps if you don't understand them.
Could you please be more specific in your questions, such as what part of the experiment are you not sure how to do? There are many parts of the project, so try to be as specific as you can so we can help you more effectively.
There is some great information there that will help you get started. Maybe researching more about the lifecycle of butterflies will help you; there are some amazing pictures online under google images, you can search pictures/diagrams of "butterfly lifecylces" or something close to that.
The purpose of science projects is to find out more information about a particular subject--hopefully one you are interested in
. Project simulate real world situations, but obviously in an environment in which you control. In this experiment you will be controlling the temperature of pupae development. When you control a part of the experiment that is called an INDEPENDENT VARIABLE. Please read more about variables here:http://www.sciencebuddies.org/science-f ... bles.shtml
You want to know how this topic imitates nature? Try to think of how the temperature (which is, by the way, the part you are experimenting with) you will be controlling is similar and/or different than how you would find it in nature. You will need some background information on the lifecycle and the environment that butterflies grown in, such as temperature. You can google that or go to the library.
Re-read the experiment and ask us any specific questions you have after that. Have fun! Sounds like a fun project to do.