Which of the following can be considered an Ecosystem Service? The seasonal spawning of Salmon upriver

A beaver building a dam in a streambed

Plants converting atmospheric carbon dioxide into oxygen

A rockslide creating a new path down a mountain

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.

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

In which direction does the moving force of air flow? a-from warm temperatures to cold temperatures b-to areas of high pressure to areas of low pressure c-east to west d-from high elevations to low elevations