Stars whose brightness changes periodically are known as variable stars. In 1912, Henrietta Leavitt discovered that the rate at which the brightness of a variable star changes is related to its overall brightness. Ejnar
Hertzsprung used this finding to calculate distances between far away stars. This later allowed Harlow Shapley to estimate the size of the Milky Way Galaxy and Edwin Hubble to detect the motion of galaxies. Hubble often
said that Leavitt deserved the Nobel Prize for her work, but she died before she could be nominated. What does the history of research on variable stars suggest about scientific knowledge?
Physicists prefer to build new knowledge based on their own work
Physicists do not like to use knowledge from scientists of the past.
Physicists build on the ideas of others to expand scientific knowledge.
Physicists are best when developing new ideas that will lead to individual recognition
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How does upwelling affect coastal fisheries? upwelling damages nutrient supplies at coastal fisheries as the warm, nutrient-rich surface water is replaced by nutrient-poor, cold water. upwelling damages nutrient supplies at coastal fisheries as the cold, nutrient-rich surface water is replaced by nutrient-poor, warm water. upwelling improves the nutrient supply at coastal fisheries as the warm, nutrient-rich surface water replaces the nutrient-poor, cold water. upwelling improves the nutrient supply at coastal fisheries as cold, nutrient-rich water replaces the warm, nutrient-poor surface water.
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Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."
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Introducing minvasive species to an ecosystem results in an increase in biodiversity is it true or false
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Stars whose brightness changes periodically are known as variable stars. In 1912, Henrietta Leavitt...
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