Bright Light: Mary wanted to conduct an experiment to determine if the color of light changes how a plant grows. She selected four different colors of light to use: red, white (normal), green, and blue. She used the same type of plants, gave them the same amount of water and exposed them to the same amount of light each day. She grew 3 plants in each light for one month and measured each plant's growth twice a week. After one month, she found that plants grow best in white light. Identify the independent variable.

color of light

Explanation:

The independent variable is the variable that is supplied and often varied/manipulated by the researcher during the course of experiments. It is varied/manipulated in order to see the effect it will produce on another experimental variable - the dependent variable.

In this case, out of all the variables supplied by Mary, only the color of light supplied was varied - red, white, green, and blue; other variables supplied were kept constant. Hence, the independent variable is the color of light.

1. glaciers are melting

2. more water going into ocean (water's such as fresh waters, etc)

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.