Suppose you have discovered a new long-period comet. Name the comet and explain its origin, appearance, and orbit.

What is the amount of organic matter in all living organisms in a habitat called?

The creation of the trans-siberian railway allowed people to travel across russia. how could this railway impact russian culture?

Which of the following statements best describes what is occurring in the land surrounding the sahara desert? a desertification is increasing, and the desert is expanding. b. fewer people are trying to farm in this semiarid region. c. the desert is shrinking with the increased use of irrigation. d. increased urbanization has resulted in decreased deforestation. select the best answer from the choices provided mark this and return save and exit next submit