The data in the graphs shows the hydrogen and helium ratios in main sequence stars of different initial masses. What connections do you see between the
amount of time stars of different masses spend in the main sequence and the
data in the graphs?

(This is earth science)

Time ! for a smell to begin the process of registering in your brain, first you must a) inhale odor molecules into the nasal cavity b)transduce scent chemicals c)have a scent to inhale d)all answers can work

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.