Ask an Expert (Page 33)

bioluminescent bacteria

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

bioluminescent bacteria bioluminescent bacteria I have a student using bioluminescent bacteria to detect heavy metal contamination in water. We have a Vernier light sensor and a tiny circuits light meter, but neither one is picking up light from any of our bacteria ... stock or in the contaminated waters. We subcultured the bacteria, so we know it is alive and properly reproducing. Does anyone know why we can't seem to pick up light readings? Re: bioluminescent bacteria Hello,… Read more

Science Project Suggestions for High School Students?

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

Science Project Suggestions for High School Students? Science Project Suggestions for High School Students? Hi everyone I am looking for ideas for a fun science project for high school students. I want a project that is practical, easy to do, but still creative. Some of my areas of interest are renewable energy, environment, and artificial intelligence. Can you suggest suitable projects for me? Also, if you have any reference materials or instructions, I would love to hear from you. Thanks… Read more

Help defining question/hypothesis

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

Help defining question/hypothesis Help defining question/hypothesis My daughter is wanting to do a science fair project about dreams. She’s done the background on what dreams are, theories on why we dream but we’re struggling with the project portion. She’s decided to give out a questionnaire about people’s dreams and she thinks she would like to compare differences in adults’ and kids’ dream content in her “hypothesis”Would a survey asking about topics of dreams, frequency of nightmares be… Read more

Automatic plant watering system

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

Automatic plant watering system Automatic plant watering system I have built the circuit described be the instruction and used the correct code I believe, but the water only pumps the first time it switches on. How do I fix this. Moderator: Project: https://www.sciencebuddies.org/science-fair-projects/project-ideas/PlantBio_p055/plant-biology/arduino-automatic-plant-watering Re: Automatic plant watering system Hi - depending on the size of the pot, the type of plant, and how much water… Read more

Mass Driver Project Question

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

Mass Driver Project Question Mass Driver Project Question My 7th grader is working on the Mass Driver project currently and we do not happen to have any hall effect sensors at the moment. Would IR sensors work in their place? I had an additional question, could he reverse the polarity of the electromagnet using an L298N motor driver? I thought it might work but I don't want to frustrate him with my possibly bad idea. He wanted to try to push the projectile after it passed the sensor by… Read more

Science Expo

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

Science Expo Science Expo This year's Science Week theme is Decoding the Universe – Exploring the unknown with nature's hidden language" Can you please suggest what activities will be suitable to support these theme for Grade 2 to 6 students. Thank you 😊. ------------------------------------- Leave this to help the Experts: The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/milk-into-plastic]Turn Milk into Plastic[/url] Re: Science… Read more

Bioengineering a Vital Organ

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

Bioengineering a Vital Organ Bioengineering a Vital Organ Hi, I am doing a project related to "Creating a Kidney: How Stem Cells Might Be Used to Bioengineer a Vital Organ." I was wondering if I could use this project as a guide to my science fair project that in which the science fair will take place in August. I will be making my own adjustments to it based on the country I am living in. I will only proceed with this project with proper approval if not approved I will not proceed with this… Read more

Can AI diagnose breast cancer - Project

Ask an Expert Topic Forum: Grades 9-12: Math and Computer Science

Can AI diagnose breast cancer - Project Can AI diagnose breast cancer - Project I've run all the cells needed to run for the project but I'm unsure of how to analyze and understand the results? When you reach the end of the project, you are presented with a graph of the performance metrics of the neighbors in this project, but I'm not sure what the accuracy, precision, and recall represent. I'm also unsure of what the decision boundary is showing me. It's a graph with several blue and… Read more

Question about Secret Messages With Invisible Ink! activity

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

Question about Secret Messages With Invisible Ink! activity Question about Secret Messages With Invisible Ink! activity Type your question below and then press Submit! Instead of cardstock can I use white construction paper or printer paper? How important is it that it be cardstock? ------------------------------------- Leave this to help the Experts: The activity can be viewed at: [url=https://www.sciencebuddies.org/stem-activities/invisible-ink]Secret Messages With Invisible… Read more

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