Q: What were the first living things to evolve on earth? Choices: - eukaryotes - carbon - DNA - prokaryotes A:
prokaryotes

Q: An increase in what, across the periodic table, explains why elements go from metals to metalloids and then to nonmetals? Choices: - neutrons - temperature - protons - electrons A:
electrons

Q: Which two planetary bodies have humans walked on? Choices: - Mars and Jupiter - The Sun and Mars - Earth and Saturn - earth and the moon A:
earth and the moon