Science Buddies: "Ask an Expert"

Hello. I’m doing a science project about how caffeine affects the psychology of animals. I had a question about how i do the write up and what insects I could use. Also if i could test how nicotine affect the psychology of animals and what would i need to use for the nicotine effect.
Thanks

Moderator note: https://www.sciencebuddies.org/science- ... physiology