The emission spectrum of mercury is provided, Along with the emission spectra of four stars. The emission spectra for hydrogen and helium in each of the stars has been grayed out. Which of the four stars, according to the data, contains mercury?
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Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?

This rapid change in species that rarely leaves behind fossil evidence is referred to as