A scientist makes a discovery that suggests a hominid species created and used relatively sophisticated tools. The scientist decides to publish his findings. Which of the following sources would be regarded as the most reliable?

A scientific magazine article
A college or university website
A film on anthropology
A journal reviewed by peers

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.