The main reason that it's important to test only one variable at a time is so that

a. scientists can easily tell which variable caused the results.
b. qualitative data can be recorded.
c. scientists can have many hypotheses tested at once.
d. quantitative data can be recorded.

Which of the following is not true about the atomic model of substances?

[ou.03jthe pictures below show the wavelengths and intensities of electromagnetic radiations emitted by three stars, star 1, star 2, and star 3. intensity intensity- intensity- 1000 3500 6000 8500 11000 wavelength (a) star 1 1000 3500 6000 8500 11000 1000 3500 6000 8500 11000 wavelength (a) wavelength (a) star 2 star 3 which of these statements is correct about the color of the three stars? star 2 is white in color o star 2 is yellow in color star 1 and star 3 are yellow in color star 1 and star 3 are white in color

What are some natural measures of time