Which sentence provides evidence that heat travels from earth’s mantle up to its crust? a) earth’s atmosphere is warmer during the day than at night. b) earth’s outer surface is cooler than its interior layers. c) rocks and other objects on earth’s surface heat up quickly in the afternoon sun. d) the core of earth is solid, but the layer just beneath earth's crust is molten.

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

St. louis, missouri, and san francisco, california, both lie around 33° north latitude. st. louis is inland, while san francisco is on the coast of the pacific ocean. which statement about these north american cities would be true? san francisco will be warmer than st. louis in the winter. san francisco and st. louis will be about the same temperature year round. san francisco will be warmer than st. louis in the summer. san francisco will be warmer than st. louis year round.

Why do so many children develop illnesses in southern africa? a. poor nutrition due to poverty c. very bad air pollution b. climate many diseases thrive d. declining life expectancy