Since the Industrial Revolution : a) global temperatures rapidly increased, then steadied out over the past 25 to 30 years global temperatures have continued to warm at accelerating rates.
b) human population growth rates have decreased with a subsequent decrease in the warming trend that characterized pre-Industrial Revolution times.
c) no observable warming or cooling trends have occurred, rather temperatures have oscillated between warm and cold periods.

Awalk up the phase change graph worksheet

How will the system respond to a temperature increase?

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.