Most organisms in the biosphere exchange the gases oxygen and carbon dioxide with the atmosphere. Which of the following describe an
exchange of matter between the atmosphere and the geosphere?
A
a volcanic eruption releasing carbon dioxide into the atmosphere
B. carbon dioxide dissolving from the atmosphere into ocean water
c. the remains of living things settling on the floor of the ocean, and then becoming rock
D. water vapor condensing in the air to form clouds

On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

How does photosynthesis show the conservation of mass and energy?

What do you need to use in order to work as an environmental scientist? you need to use the scientific method and__ in order to work as an environmental scientist.