a veterinarian
as man other scientists do, try the experiment again and compare results
A person who drops litter.
The independent variable is the factor changed by the scientists.The dependent variable (think of it like this: it dependson the results of the experiment) is what is measured.
He has to want to quit. You cannot force a person to quit a tobacco product and expect good results.
When you put a person on an army litter to carry him/her to safety.
Bias. If a person lets there bias into a scientific experiment, the results will likely be skewed.
To make your hypothesis considered scientific it must have testable and measurable results. Example: If you do an experiment and the results are testable and measurable another person would be able to do the exact same project and come out with the same results.
To make your hypothesis considered scientific it must have testable and measurable results. Example: If you do an experiment and the results are testable and measurable another person would be able to do the exact same project and come out with the same results.
There are several ways to make an experiment more valid. For example, one should always make any experiment repeatable, and they should conduct several trials before publishing results or coming to conclusions.
Repeatability refers to the ability to obtain the same results when an experiment is repeated by the same person using the same methods and equipment. Reproducibility, on the other hand, refers to the ability to obtain consistent results when the experiment is repeated by different people or in different settings.
By bare wires i presume that you mean wires not in closed in a protective sheath. As an experiment wires will have to be changed around quickly to see what the results of the connection produce. Once an experiment changes status to equipment production the regulations change to safety. The customer has to be protected from electrical shock. In an electrical experiment safety has to be the responsible of the person doing the experiment.
What a person intends to do in an experiment depends on what the experiment is. Someone will need to know what the exact experiment is to know what they would do in it.