Nitrogen gas is most commonly found in which earths sphere?
a. biosphere
b. exosphere
c. atmosphere
d. hydrosphere

Which number shows the location of the united kingdom of great britain? 7 5 2 4

Which sequence of transformations on preimage ∆abc will not produce the image ∆a'b'c'? a. reflection across the line y = x b. rotation 180° clockwise about the origin followed by a reflection across the line y = -x c. reflection across the x-axis followed by a reflection across the y-axis d. reflection across the line y = -x followed by a rotation 180° counterclockwise about the origin e. reflection across the y-axis followed by a rotation 90° clockwise about the origin

The earth is composed of three different chemical layers: core, mantle and crust. the formation of these layers was from a process called