The Moon formed when a protoplanet (a "baby" planet) slammed into Earth as it was still forming. Instead of forming a small Moon and large Earth, what if instead they formed two equally-sized objects that orbit each other. Since they would have the same mass and size (both smaller than Earth), what would you expect about how these two objects would cool?

Hich of the following best summarizes the text’s depiction of the ancient indus valley cities (namely harappa and mohenjo-daro)? a. the cities were very plain and simple; the people did not focus on art and architecture, devoting their time instead to agriculture and the bare essentials. b. the cities were adorned, or decorated, with almost overwhelming displays of wealth and artistic architecture. c. the cities were extremely clean, relying on an advanced water and sewer system, though this was mainly constructed for the innermost areas of the cities. d. the cities were clean and peaceful, and they were designed in an extremely organized fashion, using an advanced water and sewer system to keep them this way

Which of the following planets is classified as a terrestrial planet? a. neptune b. venus c. saturn d. jupiter

Where does the availability of water pose the greatest problem