classs 5 girls and boys come in zoom it is science class come fast with your name classs is stated come fast I am waiting

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere