Ask an Expert (Page 14)

Tempering Chocolate

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

Tempering Chocolate Tempering Chocolate My student would like to turn this into a Science Fair project but we are having a hard time determining what we would be testing. Could you help with this? Moderator note: https://www.sciencebuddies.org/science-fair-projects/project-ideas/FoodSci_p038/cooking-food-science/tempering-chocolate Re: Tempering Chocolate Hi there, The experimental procedure for this project is totally up to you—you get to choose what you would like to explore… Read more

AI for Litter Detection

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

AI for Litter Detection AI for Litter Detection Hello, I am doing a litter detection AI project that requires using Google Colab. I have done all the steps accordingly and I am currently on step no.4 and it states to simply run the code block it has provided me. But every time I try to run it it gives me an error message. I would appreciate if you could help guide me through this issue as soon as possible. Thank You, Saira Moderator note: … Read more

Question about Distance

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

Question about Distance Question about Distance up close, the plane is huge, about 45 people max. far away, the plane is about the size of a toy plane. Why is that? Re: Question about Distance Hi! This is all due to a concept called a “visual angle,” which is in your retina (in your eye). When closer, this plane, looks much larger because it appears as a larger visual angle in your retina, so it takes up more space in your field of view. When further, the visual angle gets smaller and the… Read more

upgrading trash skimming robot

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

upgrading trash skimming robot upgrading trash skimming robot hello! so i made it to regionals with my prototype of an rov with a net attached to collect trash in waters, but the teachers that judged my project worried about wild life getting caught in the net. my teacher wants me to upgrade my prototype with this feedback and i could use some suggestions. one judge told me to use a rotator to detect what is solid and what is wild life but im a bit confused? i went looking for rotators and… Read more

Ultrasonic levitator

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

Ultrasonic levitator Ultrasonic levitator Posting on behalf of student Project: Ultrasonic levitator https://www.sciencebuddies.org/science-fair-projects/project-ideas/Elec_p121/electricity-electronics/ultrasonic-levitator ---------------- [attachment=0]hDtvwWgzz30vKCLCZaO9FZtgOzGZRUte4g.png[/attachment] Re: Ultrasonic levitator Hello, If this is your first Arduino project, we recommend going through at least the very first tutorial on this page:… Read more

MY light seeking robot

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

MY light seeking robot MY light seeking robot There is a problem with my speedy light seeking robot. The wheels are going at different speeds somehow. We did finish building and put all of things in the right spot on the bread board. Its just the motors that are moving at different speeds. We did have to switch one motor wires because the wheels went opposite ways. Heres a picture. [attachment=0]Screenshot 2025-12-03 3.35.29 PM.png[/attachment] Moderator note: Related Project: … Read more

Question about Making a Sugar Thermometer activity

Ask an Expert Topic Forum: STEM Activities

Question about Making a Sugar Thermometer activity Question about Making a Sugar Thermometer activity How does sugar affect kids energy? ------------------------------------- Leave this to help the Experts: The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/making-a-sugar-thermometer]Making a Sugar Thermometer[/url] Re: Question about Making a Sugar Thermometer activity Hi - It doesn't sound like this is related to this "Making a Sugar Thermometer" science… Read more

Mini Drone Problem with lift

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

Mini Drone Problem with lift Mini Drone Problem with lift Posted on behalf of family Project: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Aero_p058/aerodynamics-hydrodynamics/diy-drone-how-much-weight (Or this activity: https://www.sciencebuddies.org/stem-activities/diy-mini-drones ) ------------------------ Hello, my son and I just completed the DIY mini drone and it’s not taking off. I was careful with the instructions and at first it did rise up about 6 inches and… Read more

Vitamin C glass vs plastic jar

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

Vitamin C glass vs plastic jar Vitamin C glass vs plastic jar Posted on behalf of student Project: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Chem_p044/chemistry/which-orange-juice-has-the-most-vitamin-c ------------------------------------------ Would it be possible to substitute the glass jar for a clean plastic one in the "Which Orange Juice Has the Most Vitamin C?" experiment? If so, does it have to be made of a specific kind of plastic? Re: Vitamin C glass vs… Read more

ARDUINO UNO R4 MINIMA

Ask an Expert Topic Forum: Grades K-5: Physical Science

ARDUINO UNO R4 MINIMA ARDUINO UNO R4 MINIMA Can I please have the instructions on how to activate bootloader mode on my ARDUINO UNO R4 MINIMA. I think this is why I keep getting the "exit status 74" error in Arduino IDE. Moderator note: Projects: … Read more

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