Ask an Expert

Optics question

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

Optics question Optics question So I recently gotten an UV flashlight for a project at school, and when I was at home and I started to play with it, I went to the bathroom, lights off and pointed at different things, and then I was pointing at a wall but when I looked closer, I could see little like almost static like dancing transparent strings that were in constant motion and looked like they were almost, again, bouncing/dancing; I tried searching on YouTube for the answer but it just… Read more

How do I structure my sophomore year science project regarding cellulose extraction from pencil shavings?

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

How do I structure my sophomore year science project regarding cellulose extraction from pencil shavings? How do I structure my sophomore year science project regarding cellulose extraction from pencil shavings? Hello everyone, I am working on a project involving the extraction of cellulose from pencil shavings using an alkali treatment (NaOH) followed by bleaching with NaOCl. The main aim is to investigate how the concentration of the sodium hydroxide solution affects the yield of cellulose… Read more

Question about Make a Fire Snake activity

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

Question about Make a Fire Snake activity Question about Make a Fire Snake activity Type your question below and then press Submit! I have tried this experiment every spring for the past 5 years, and we have been unsuccessful each and every time! What are we doing wrong? We have followed the directions exactly - even tried the experiment using more lighter fluid and again with less lighter fluid than called for. We've used a small quantity 4:1 mixture and a large quantity 4:1 mixture. The… Read more

Water to Fuel to Water

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

Water to Fuel to Water Water to Fuel to Water I need help! https://www.sciencebuddies.org/science-fair-projects/project-ideas/Chem_p099/chemistry/fuel-cell#objective In this experiment, why we use Phosphate buffer solution instead of water even though it examines the effectiveness of cobalt nitrate in water split process? Re: Water to Fuel to Water Hi there, The point of the Phosphate buffer solution is to decrease the amount of energy required in order to split water. If you take a look… Read more

Sneezing Twice in a row

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

Sneezing Twice in a row Sneezing Twice in a row I have a student in my Grade 1 class who would like to know - why do we normally sneeze twice when we sneeze? Thank you! Re: Sneezing Twice in a row Hi, To my knowledge, the second (or sometimes third) sneeze usually expels whatever irritant wasn't completely cleared. We don't always sneeze in ones because another sneeze ensures that all foreign particles are fully removed (the initial sneeze might not get everything out)! - AB Read more

Butterfly Experiment

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

Butterfly Experiment Butterfly Experiment I am conducting an experiment on what the effect of different colors of artificial light on the amount of time a butterfly will spend in its chrysalis. I used purple, blue, white and yellow light. I would like to know how/why light rays effect a butterflies metamorphosis! Re: Butterfly Experiment Hello, This is a fascinating experiment! Different colors of light do affect the amount of time a butterfly spends in its chrysalis, and this is because… Read more

Control Motors with Your Muscles!

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

Control Motors with Your Muscles! Control Motors with Your Muscles! Control Motors with Your Muscles! We need help. The kids have the programming for the Myoware 2.0 but we can't figure out the hookups to get muscles to turn the motor. We have hookups for the muscles to the arduino shield and hookups for the motor to the arduino red board, but how do we connect the arduino and the shield when the cords go in the red board where the shield should go? Moderator note: Project:… Read more

Acid Rain and soil PH

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

Acid Rain and soil PH Acid Rain and soil PH im doing an expirement about how the change in soil pH due to acid rain will affect plants. i planned to grow 3 indivual pots of wheatgrass in the span of 2 weeks and water each one with a different spray bottle. One was filled distilled water to have a neutral pH so it can stimulate normal gorwth. The two others i used the same distilled water but added a small amount of vinegar so i could get a pH of 3 and 4. however when i measured the regular… Read more

Help needed for a Programmable Probiotic using E. coli Nissle 1917 as a cancer-targeting vector

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

Help needed for a Programmable Probiotic using E. coli Nissle 1917 as a cancer-targeting vector Help needed for a Programmable Probiotic using E. coli Nissle 1917 as a cancer-targeting vector Hi! My name is Alia and I'm a 12-year-old Grade 5 student from Dhaka, Bangladesh. I've been developing a theoretical concept for a Programmable Probiotic using E. coli Nissle 1917 as a cancer-targeting vector. I call her Karen 1917 (Singular: A Karen 1917, Plural: Karens 1917). I have a question for… Read more

Egg drop challenge questions

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

Egg drop challenge questions Egg drop challenge questions I am doing the Great Egg Drop Challenge in my Physical Science class right now and I have a plan for it that I am unsure about. I haven't started to make the project myself yet but here is my plan, I am wrapping the egg into cotton then making a straw cage to keep it secure, and I will get a small box to put soft food into it for extra protection. The materials I have for it is the small box, soft food, cotton, and the egg. How can I… Read more

Ask an Expert (top 2,000 results)

Explore Our Science Videos