I don't know what this is might a foreign languages.
They started from Vulgar Latin. (Word for common)
Answer:
Conducting a fair test is one of the most important ingredients of doing good, scientifically valuable experiments. To insure that your experiment is a fair test, you must change only one factor at a time while keeping all other conditions the same. Scientists call the changing factors in an experiment variables.
Answer:
Explanation:
Because the meaning of the sign can change depending on your facial expressions and the five parameters
