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Comments

Michelle

Dear Dr. Shawn,

I did a science project last year in which I studied the production of carbon dioxide by yeast at different temperatures. I measured how long it took a given quantity of yeast at a given temperature to displace 100 millileters of water.

To do so, I placed the yeast in closed canning jar that was airtight. I cut a small hole in the lid and placed a tub inside, then sealed all around the tube with silicone cement. I placed the other end inside a glass jar that I filled with water and kept upside down in a tub of water. As the yeast generated gas, the excess gas flowed into the jar in the tub and displaced the water inside. I marked a line on the jar that represented 100 milliliters and measured the time that it took for the displaced air inside the jar to reach the line.

I repeated each trial three times and averaged the results at each of six different temperatures from ice bath to about 120 degrees. I measured the temperatures using a glass thermometer. By graphing the results I was able to predict the optimum temperature for yeast growth. When I tested the prediction by measuring the gas production rate at that the temperature suggested by my graph I got very good agreement!

I took first place with this project.

Michelle

Viahney

I did a science project on which soap leaves more film on your skin. I needed cofee filters and cups. I placed the coffee filters on a cup and tied it with a rubber band. Then I poked a tiny hole at the center of the of the coffee filter and left each cup alone for half an hour. Then I took notes and graphed it. It was pretty fun.

m

I am in the process of doing the moisture in lotion experiment, and i used plain gelatin not agar flakes is that ok?

LACEY

WITH THE CLEANER MOUTH PROJECT DO YOU JUST WIPE THE SAMPLE FROM YOUR MOUTH ON TOP OF THE GELETIN OR DO YOU STICK THE CUTIP INSIDE , AND ARE YOU LOOKING FOR SPECIFIC BACTERIAS OR IF THEIR IS A LOT OF BACTERIA

Carolina

Hi dr.shawn, the DNA extraction kit is great! thank you! I have a question though.Please try to respond as soon as possible. How can you tell how fresh DNA is? PLEASE PLEASE PLEASE (and thank you)help me!!!! I cant find it anywhere on the internet. Please try to respond befor the first of november.

science fair project ideas

These are some great ideas. As a judge of a science fair myself, I'm so sick of seeing the same old stuff over and over again. Thanks for promoting the idea of unique science fair projects!

7th Grader

I want to do the lotion experiment, but I can't find any petri dishes! Is there anything I can use to substitute them?

7th Grader

Please respond as soon as possible!

Kiara Brooks

Hello,
I have been participating in science fairs for most of my life. I have to ask a question aobut the Who's Mouth is Cleaner:Peoples or Dog. Just one thing, how are you able to determine that if you only tested a limited amount of test subject. I say this because people have diffrent brushing habits and your dogs are raised by two diffrent owners. What factors did you consider and not consider in your project.

Thankyou and Goodnight!

Kiara Brooks

Hello,
I have been participating in science fairs for most of my life. I have to ask a question aobut the Who's Mouth is Cleaner:Peoples or Dog. Just one thing, how are you able to determine that if you only tested a limited amount of test subject. I say this because people have diffrent brushing habits and your dogs are raised by two diffrent owners. What factors did you consider and not consider in your project.

Thankyou and Goodnight!

luke

hi doctor shawn im in 7th grade and i need help on my prject

luke  m

i love drama im at LHMS wooooooooooooohhhhhhhhhhhhh

Sarah

Hello. My experiment was; do organic or non-organic foods appeal more to people on average? I got to go to the regional science fair with this idea. Hope I helped someone, bye!

Sarah

Hello. My experiment was; do organic or non-organic foods appeal more to people on average? I got to go to the regional science fair with this idea. Hope I helped someone, bye!

khan

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belal

Ok @ the soda fizz project could u email me the exact Procedures-belal21999@hotmail.com

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this is not for science fair, it's just for biology class. we need to do any type of science project. I want to do something that involves my dog or my fish....any ideas on what i could do???

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I need a very technological invention or idea for highschool senior. Please, don't give me a bunch of websites, nor a single website. Give me ideas of anything you can think of. Please, and thankyou

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I've heard that a new vitamin was discovered in Aloe Vera, maybe that might require some looking into?

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