Did you know that the night sky is an illusion? Stars are so far away that it takes millions or billions of years for the light to shine on the Earth. This means that when we see the stars, the 'stars' we are seeing aren't actually there anymore. They have moved but since the light took so long to get to Earth, the stars aren't there. Scientists think that if we put a giant mirror 20 thousand light-years from earth and looked into it, we would be able to see the dinosaurs. This proves that time travel is possible and we just don't have the technology yet.

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.