Read this excerpt from "Why Are They Called Black Holes?"
After many millions or billions of years, the star runs out of hydrogen and energy. Then the star "dies" and collapses into a dense little ball with tons of gravity. Albert Einstein’s theory of relativity predicted that black holes would have to exist if a dead star had enough gravity. Using Einstein's theory, astronomers calculated that if a star more than three times as heavy as our sun died, the force of gravity pulling matter in could overwhelm any other force pushing matter out.

In this excerpt, the author makes a connection between a scientific theory and

the calculations that scientists make.
the beginning of a star's existence.
the idea that all things live and die.
the question of why gravity exists.

Instructions: the following argument argues for advertising to children. read the argument and answer the question that follows: topic and question advertising: should companies be allowed to advertise to children? ineffective argument i think that advertising to children is necessary. how else will we know what we can buy? i think that children are not aware of the products that are available. most children don’t own cars and can’t drive to stores to look around. the only way we know what we can buy is by seeing advertisements on tv. my friend really likes advertisements, too. he said, "how will we know what to buy if we don’t see advertisements? " seriously, children are consumers, too. we know what we like and we ask our parents to buy these products for us. i know that i like certain cereals, but how would i know that if i did not see advertisements? i love those commercials! kids are people, too. why is the argument ineffective? in a paragraph of 7–10 complete sentences, explain why the following parts of the argument are ineffective, and how they can be improved: claim support conclusion clincher point of view transitions