What is most abundant component of air by volume?
a. nitrogen
b. oxygen
c. hydrogen
d. ozone

Heyi am new to are you all americans? ( just want to know , i don't mean any offence ) ?

The figure is a square. its diagonals meet to form four right angles. what is the approximate value of x? 2.8 units 3.3 units 4.0 units 5.7 units

What's a recharge area? a. the part of an aquifer where groundwater meets a lake or stream b. the part of an aquifer where surface water reaches the water table c. the part of an aquifer that's located between two aquicludes d. the part of an aquifer that's located at a lower elevation