The biosphere is the only one of Earth’s systems that contains life.

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land

Which are evidence of seafloor spreading? check all that apply. molten material magnetic stripes continent material drilled core samples ocean water samples

Match each description of an object’s motion with the position-time graph that represents it. not moving moving with constant speed speeding up slowing down