PLEASE HELP, WILL MARK BRAINLEST TO WHO EVER ANSWERS FIRST The table below shows the half-lives of four radioactive materials. Radioactive material Half-lives Bismuth-212 60.5 seconds Sodium-24 15 hours Iodine-131 8.07 days Strontium-90 29 years Which of these materials will decay the slowest to one-fourth of its original amount? Bismuth-212 Sodium-24 Iodine-131 Strontium-90

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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there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.