The age of oceanic crust a. is the same throughout the world's oceans. b. is greatest at the mid-ocean ridge and least farthest from the ridge. c. indicates that the oldest oceanic crust is approximately 600 million years old. d. has been determined by radiometric dating.

Hurryyy ! a student is asked to describe the path of a paper airplane that is thrown in the classroom. which statement best describes the path of the paper airplane? a. the paper airplane will move in a straight line, according to newton’s first law of motion. b. the paper airplane will drop straight to the ground once its inertia gives in to the force of gravity. c. the paper airplane will create a curved path toward the floor as it is pulled toward earth’s center. d. the paper airplane will orbit around the desk because it is the object with the largest mass in the room.

The us and canadian governments are doing all of the following to combat environmental problems except a. encouraging the use of public transportation b. enacting clean water policies c. requiring emissions testing d. limiting animal populations in some regions

Which two nations are doing the most to combat their environmental issues?