## Documents Similar To IB Chemistry IA: Kinetics.

### What is a Hypothesis? - Definition & Explanation - …

In 1969 Dr. John Grebe, speaking to the Texas State School Board, offered a \$1,000 reward to anyone who could provide any first example of physically verifiable evidence (or even a basic mathematical model) sufficient to elevate the then hypothesis of macroevolution up to the status of scientific theory. The challenge was offered to the top evolutionary scientists of that day. Grebe was the director of nuclear and basic research at Dow Chemical, Midland, Michigan. One man who tried to collect was atheist David Bradbury. He had been a brash defender of evolution for 20 years since his university days. Not only was he not able to find the evidence to defend evolution. Bradbury eventually became a Bible-believing Christian and he re-offered Grebe’s challenge. On January 28, 2002, he wrote,

### Sample Chemistry IA's • r/IBO - reddit

A good EEI could be to look at the conditions required to produce the different densities of rigid foam. You could use equal amounts of the monomers and try them with different temperatures or different amounts of stirring. You could even try adding more water to the polyol monomer. You could even try making a variable density foam by placing the reaction vessel (plastic cup) on a cold surface. The main thing is to explain why you'd want a particular density and hypothesise how it could be achieved. It will be heaps of fun.

A good source of Fe(II) is ammonium iron (II) sulfate hexahydrate and a standard solution of about 1 g/L is good. Then make up a range from 0.1 to 8 mg/L in 25 mL volumetric flasks for the standard curve. If you use the RGB values from the phone, you can calculate the absorbance. In essence, you subtract the blue value from the green value for the sample. You divide this by the B minus G values for the water blank. Then take the negative log (10) of the result. The value used by scientists is somewhat different (J. Chem. Educ. 2015, 92, 1696−1699, Supplementary Material). For example: A = -log((0.76Gs+0.5Bs)/(0.76Gb+0.5Bb) where Gs is the Green reading for the sample and Gb is the green reading for the blank. Likewise for blue (B). The value for R is not used as it is assumed to be zero

## Learning how to write a good lab report is like ..

there is not one single instance whereby all the tests essential to the establishment of the scientific validity of evolution have been satisfied. There are hypotheses, grandiose models, suppositions, and inferences, all of which are formulated and reinforced within the collective and self-serving collaborations of the evolutionist gurus. However, none of this amounts to true scientific evidence for evolution. It was in the 1970s that, to my great surprise, bewilderment, and disgust, I became enlightened to this (Edward Boudreaux, Ph.D. in chemistry from Tulane University, In Six Days, p. 205).

## Planarian Regeneration and Stem Cells | HHMI …

Law- a theory/hypothesis that concisely explains a set of observations To recap the Scientific Method, here is a . : Here is a : over the Scientific Method. : The in the 21st century has expanded to include many research methodologies and technologies.