Science Experiments

Here is a non-scientist's view. Density is a ratio, and as such it is an abstract expression of the nature of a certain kindof matter. Density is indepenent of how much or how little matter you are talking about. Density is the amount of mass per a unit of volume of the material. Length, on the other hand, is a characteristic of a given piece of measureable material, independent of the make-up of the material. Every rigid physical object has some linear measurement that can be considered length. The length of the object can be modified without changing in any way the nature of the matter. In a given reference frame, the density of a given kind of matter is constant.

Cotton fabric will burn faster than wool fabric. Wool will also be more difficult to light than cotton and may even self extinguish.

divide the mass by the volume to get the density.

50 mg of gas occupying 0.064 L of space = 50 / .064 = 781.25 mg / L = .781 g / L

The flammability of a substance refers to whether or not it will burn. It is a measure of how easily a material will ignite and sustain combustion in the presence of a flame or spark.

chemical properties are to do with how it acts chemically- so:

polar vs Non polar

PH / Pka

melting point / boiling point

Therefore non-examples would be its molecular mass/ geometry / atomical structure... although some of these would surely contribute to its chemical properties.

Weathering breaks down rocks and minerals, making them more susceptible to erosion by agents like water, wind, and ice. This process of breaking down rocks into smaller particles helps in the transportation of sediments by erosion, shaping landscapes and impacting the environment. Therefore, weathering plays a crucial role in initiating and facilitating erosion processes.

Controlled variable.

First and foremost you must specify the hypothesis you are testing by the experiment. So you will have a testable null and alternate hypothesis.

Next you will detail the resources and procedures used to generate the data needed by the tests specified by the hypothesis.

Then using the described resources and procedures you will generate and record the data specified by the first two components.

Next you will perform the analytic tests on those data, and record those results relative to the specifications made by your hypotheses.

Following that you will write a summary of your results test and conclude whether your null hypothesis was shown to be not false based on you experimental results.

Finally, you will write recommendations for further action and/or experiments based on your own experiment.

Here is the take of a non-science professional who is interested in science. Experiments can be sloppy and valid. They can also be slick and invalid. If a person does research with no intention of being fraudulent, and the research is carefully and honestly documented, then it is 'valid'. Where the experiment might be weak or badly controlled should be completely clear from the way the research was documented. There should be no attempt to doctor the data after the fact, or make procedures appear more accurately or painstakingly carried out than was actually the case. Results may have come out in favor of the hypothesis, but the value or weight of the conclusions should be able to be determined by a fair peer review. This is a broad understanding of 'valid'. Valid does not relate to whether the results support the hypothesis, but to how much relative weight can be given to the results, whichever way they go. If research is transparent, it is valid even if it's sloppy. Slick studies can use procedures and statistical tests that are so sophisticated that they are actually wrongly applied to the research question at hand, and few people would even pick up on it. Studies like this I would consider invalid. There are occasionally very embarrassing reports of completely bogus studies that have snuck through the peer review process. The best research involves experiments that are carefully and honestly done, thoroughly and accurately reported, and well controlled. All the better if they are replicated by respected researchers at a few other labs. The BBC reported on 9/9/09 that the peer review system may be on the verge of breaking down. There are too many studies being submitted to publishers from too many places. It is not the number of studies, but the difficulty in adequately reviewing them all. Reviewers have the unenviable task of determining whether or not a study is worthy of publication, with few if any ways to determine whether or not the study has been done ethically and reported honestly. What do reviewers do with studies that report radical or unexpected results? Do they conclude that the study is ground-breaking, or rule-breaking?

The purposes of testing a hypothesis is to test it. Pass or fail, the experiment is a "success" if it does that - tests the hyposthesis. If the results don't support the hypothesis, then that is valuable data that helps you either abandon or refine the hypothesis.

The factor in an experiment that responds to the manipulated variable

Testing a dogâ??s ability to recognize different scents of family members is a good science project for kids. Can your family pet recognize your scent from your momâ??s? You can begin by training the dog to recognize your scent and fetch objects you have touched. Then see if the pup can do the same if you follow the same steps for another family member. The final test would be to have the pup fetch object on command for a person from a group of everyone's objects.

I'm not exactly sure what you're asking, but I think it may "phenotype".

no, both cold and hot water can affect soap bubbles

Two kinds of controls: Positive and Negative. Depending on the test/Instrument, Positive controls will have an indication or contain the specific substance that the test or instrument is used for. (Mostly for abnormal people according to the population.) Negative controls don't contain anything. (Mostly for normal people within the population.) --

yes

Bacteria and blue-green algae are both primitive prokaryotes that live on earth now, as well as long time ago. Just recently they have changed blue green algae or cyanobacteria to be in the kingdom prokaryotes.

quantum mechanics

by using a scale that has 2 ends. you take 1 balloon that is empty and place it on one side. take another balloon and blow it up with air and place it on the other side of the scale. the balloon with air will go down because it weighs more, thus proving that air is real.

1st: Wear safety protection2nd: Make sure you have a fire extinguisher3rd: FOLLOW THE STEPS!!!!

Eyes commonly symbolize vision or observation. The eyes are considered to be among the most important sensory organs in the body.

The higher the temperature of a liquid, the more of a substance it can dissolve. So when a liquid cools back down, often some of the dissolved particles re-form into solid and precipitate out of the solution. This applies to sugar substitute as it does to any other substance. Just like regular sugar dissolves in your coffee better when your coffee is hot.

Bread mold grows best in warm and wet areas.