# Dating science fair projects

So, if you had a fossil that had 10 percent carbon-14 compared to a living sample, then that fossil would be: t = [ ln (0.10) / (-0.693) ] x 5,700 years t = [ (-2.303) / (-0.693) ] x 5,700 years t = [ 3.323 ] x 5,700 years t = 18,940 years old Math Skills Using natural logs (loge or ln): Carrying all numbers to 5 significant figures, ln 30 = 3.4012 is equivalent to e3.4012 = 30 or 2.71833.4012 = 30 A formula to calculate how old a sample is by carbon-14 dating is: t = [ ln (Nf/No) / (-0.693) ] x t1/2 where ln is the natural logarithm, Nf/No is the percent of carbon-14 in the sample compared to the amount in living tissue, and t1/2 is the half-life of carbon-14 (5,700 years).This is a selection of high school science fair projects and a brief description of each.You can colour these without changing thetaste, then ask people to rate the taste on..the top of the ramp the toy has a certain amount of potential energy .The amount of this energy depends on the height of theramp and the weight of the toy. no definite shape Ability to assume the shape of its container Low density apex . are the -thing which is hard to see The chemistry behind even the most simplistic of experiments canbaffle most, such as the bubbling as a result of salt being addedto soda.For example if you are doing an experiment of whether...Electricity is "created" when certain chemicals react together.Know that not all of the carbon-14 atoms decay at the same time, but the half-life describes how long it takes for half of them to decay.Some radioactive isotopes decay very rapidly, in fractions of a second, while others might take hundreds of thousands or even millions of years. Answer: Scientists determine the age of a fossil by determining the amount of Carbon -14 that has decayed since the organism died and was buried in the ground.

The solvent, usually water, is boiled off by the addition of heatenergy, often under reduced pressure Condensation is the opposite of evaporation and has the sametemperature as the BP of the liquid.

Question: How is the amount of C-14 in a fossil determined?

Answer: Since 1 gram of carbon-14 emits 15 beta particles per minute, the mass of carbon-14 in a fossil can be determined by measuring its rate of beta particle emission.

We use chemically- made electricity to power many machines fromflashlights to a watch or sometimes a car. The devices that store electricity are calledbatteries. This is a fairly easy experiment to set up, provided you can getround the fact that people can be put off if food doesn't look theway they expect.

You would need to use something like a pate orcustard type pudding.