Having been here on Earth for a while, you know that every year is made up of four seasons. What is the primary cause of the change from season to season? A) The tilt of the earth on its axis. B) The heating and cooling of the sun. C) The rotation of the earth on its axis. D) The change in distance from the earth to the sun during different seasons.

Which of the following statements best characterizes changes to agriculture in the united states since 1900? a. increased mechanization has reduced the need for labor.b. increased mechanization has increased the need for water, thereby increasing the need for labor.increased mechanization has increased the use of land, thereby increasing the need for labor.d. increased mechanization has increased food production, thereby increasing the need for labor. select the best answer from the choices provided.

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

Which of these is the sound of fish slapping against human flesh?