Science Experiments

Archive for the ‘Science Experiments at Home’ Category

Question: Dangers of nitrogen, carbon dioxide gas?

i was watching Cool Science Experiments that involve liquid nitrogen and solid carbon dioxide.. it makes a cool smokey effect.. however, i was wondering if we play with the carbon dioxide gas (fog from the solid C02), we will breathe in C02 and danger our health..

so.. i was wondering.. does liquid nitrogen gases (the fog) affect in any way?

Answer: The gas part has been covered. How about the Temperature of liquid nitrogen? It is soooo cold you need a special container for it…and gloves. Because if Liquid N2 comes in contact with your skin, it will INSTANTLY freeze it, and this is not your everyday freeze…it will HURT as your tissue & cells freeze beyond the point of repair. Cystalization damage will occur. People who freeze themselves thinking they’ll be able to thaw out in the future are dreaming. We have yet to figure out how to properly thaw an organism frozen to that cold of temperatures without severely damaging body parts. Just be careful of the liquid, probably even more than the gas.

I’ve watched professionals stick their face in N2 gas….its all about the air flow in the room your in…bigger the room and the more turbulent the air flow (windy), the better you’ll be.

Nitrogen is a very heavy gas, more so than CO2…both fall to the floor. It is not a good idea to have small children playing on the ground near the clouds. They are small enough to be enveloped in gas. The motion of the child and air flow will move the gas quick enough not to pose a death threat, but come on, they’re our kids for chrissake!!

Solids Liquids & Gases

Question: Design an experiment using yeast to observe population growth?

Ok, I like just came to this school about two days ago and tomorrow. I have an essay to write and this is only one paragraph. My teacher whats everything as though I was doing a Science Fair Experiment. Please I need help If you know of an experiment please e-mail me with the info. Thank you so much if you help.

Answer: Here:

http://kvhs.nbed.nb.ca/gallant/enviro/yeast_population_study_lab.html

Basically, you would add yeast and sugar to a test tube. Every day, take a sample and prepare a microscope slide. Look at the slide in the microsope and count how many yeast cells are in the field of view. Compare the cell count over many days.

Dry Yeast Experiment

Question: is this a good independent science experiment?

were having a science fair night and we have to do a science tthing that is measurable or timeable so do you think a good experiment would be “how does the amount of chocolate chips in a cookie effect cooking time?”
i would make two batches of chocolate chip cookies, one with double the chocolate chips or something and see which one takes longer…

Answer: I like where it’s trying to go, but I assume the difference in cooking time will be negligible, and won’t fully allow you to illustrate the effect of the chocolate.

Science Experiment #1