select the correct answer.
a grass snake living in northern england dies of natural causes. after a long period of time, its remains decay in the soil to become fossil fuel. when the fossil fuel is processed, sold, and burned by humans, it releases carbon dioxide into the air. which aspect of this scenario shows a carbon source becoming a carbon sink?
a.
burning of the fossil fuel
b.
decaying of the snake’s remains
c.
dead snake fossilizing underground
d.
respiration by the snake and humans
e.
humans processing and selling the fuel

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light