What is a closed battery operated series circuit

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.

Which if the following types of research is conducted on multiple occasions over time