If aliens are creatures from far away from earth does that mean that if i go to mars and came back IM a alien? and if you say i originated from earth so if matter from earth got burst into space and that matter got eaten by a alien and the matter is a part of the matter does that mean that the alien is not a alien?

What is the following best defines climate?

What function does a limb serve in each animal how are the limb bones of the four animal similar based on the similarities what can be inferred about the evolution of the poor animals

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.