Which of the Earth’s spheres is made up of the gases and air that surround the Earth and sustain life? A. the hydrosphere
B. the lithosphere
C. the biosphere
D. the atmosphere

Please select the best answer from the choices provided
A
B
C
D

Where is the only location in the united states where you drive on the left side of the road?

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.

Which statement best describes how chemical equations demonstrate conservation of mass?