Ask an Expert (Page 130)

Ask an Expert Topic Forum: Grades 9-12: Physical Science

Does iron and water make hydrogen gas? Does iron and water make hydrogen gas? What happens if you get half a jar of iron powder, add water to the top of the iron to saturate it, pour off the excess water and evacuate all the air above the wet iron mixture, then seal the jar? Does the bottle fill up with hydrogen or other gas? Re: Does iron and water make hydrogen gas? I assume you are referring to rust when you mix water and iron. From what I have read, it seems like iron will not rust… Read more

Interactive servo art not working

Ask an Expert Topic Forum: Grades 6-8: Physical Science

Interactive servo art not working Interactive servo art not working Hello, I have been helping my daughter try to build the interactive servo art that moves when it sees you. We built it according to the instructions and it isn't working properly. So, we rebuilt it several times. We made sure that the wires were all pushed in. When we rebuilt it, we used new parts. The motor moves once when the circuit is charged and then it doesn't work any longer. Do you have any tips to get this… Read more

project presentation for computer science project

Ask an Expert Topic Forum: Grades 6-8: Physical Science

project presentation for computer science project project presentation for computer science project Hi, I am planning to create a website for my science fair. I am planning to present the website to the judges. What else can I show on my presentation, should it be treated like a engineer design project showing Problem statement, Design etc. Thank you! Re: project presentation for computer science project Hello, This seems like a great idea for a science fair. I think how you present it… Read more

How to kill antibiotic resistant bacteria?

Ask an Expert Topic Forum: Grades 9-12: Life, Earth, and Social Sciences

How to kill antibiotic resistant bacteria? How to kill antibiotic resistant bacteria? So, I’m working on artificial selecting for antibiotic resistance, and one of my responsibilities is to write my own lab protocol (it’s a smaller school so I’m the only one on it). Part of that is disposing of the bacteria after, and I really don’t want to become a biohazard. So… how should I kill it? We don’t have an autoclave or anything (again, small school). Re: How to kill antibiotic resistant… Read more

How to culture bacteria

Ask an Expert Topic Forum: Grades K-5: Life, Earth, and Social Sciences

How to culture bacteria How to culture bacteria I would like to culture the strep A bacterium. I am trying to teach my son about bacteria and I’m rusty at microbiology. I happen to get frequent strep throat and thought that would be a good bacteria to learn about considering. I haven’t been in school since 2007 and have memory issues so help us needed. It’s embarrassing, but it is what it is. Any help will be greatly appreciated. Also, can this be done without an incubator? Thank you! Edit:… Read more

Question about DIY Mini Drone activity

Ask an Expert Topic Forum: STEM Activities

Question about DIY Mini Drone activity Question about DIY Mini Drone activity Is there a way I can make it fly and still control its altitude when it's not on the dowel? :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :? :D :D :D :D :D :D :D :? :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D … Read more

Help! Artificial Pancreas: pump doesn't turn on!

Ask an Expert Topic Forum: Grades 9-12: Life, Earth, and Social Sciences

Help! Artificial Pancreas: pump doesn't turn on! Help! Artificial Pancreas: pump doesn't turn on! Hello, I need help urgently. I am doing the Dealing with Diabetes: Road to developing an Artificial Pancreas experiment. My peristaltic pump turns on when I connect it to the Arduino uno, to check if it is working. However, whenever I connect it to the breadboard, which is what the experiment calls for, it doesn't turn on. How can I fix this? Is it a problem with the Mosfet or computer code? I… Read more

Help! slime mold not growing!

Ask an Expert Topic Forum: Grades 6-8: Life, Earth, and Social Sciences

Help! slime mold not growing! Help! slime mold not growing! Hi! my slime mold project isn't working. Its not growing after it was transferred to maze. see link: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Zoo_p060/zoology/slime-mold-solve-maze. please respond soon for I might flunk :( Re: Help! slime mold not growing! Dear Adam, OK, a few questions! 1) How long have you been growing it? 2) What do you see? What are your observations? 3) Do you have any ideas as to… Read more

Question about DIY Mini Drone activity

Ask an Expert Topic Forum: Grades 6-8: Physical Science

Question about DIY Mini Drone activity Question about DIY Mini Drone activity Is there a way I can make it fly and still control its altitude when it's not on the dowel? :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :? :D :D :D :D :D :D :D :? :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D … Read more

Handedness Variables

Ask an Expert Topic Forum: Grades K-5: Life, Earth, and Social Sciences

Handedness Variables Handedness Variables Hey! I am doing an experiment on body handedness. I am testing hands, feet, and ears. I am confused what my variables will be for the experiment. Can someone help me? Re: Handedness Variables Dear akm08, Sounds like a cool experiment! Before proceeding, what aspects of handedness are you testing? Are you testing the number of X handed persons in your experiment? Are you testing what happens to people if they are right versus left handed dominant… Read more

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