Humans breathe in order to deliver oxygen to individual cells. Oxygen molecules are attached to and carried through the body by A. blood cells. B. the lungs. C. blood vessels. D. the diaphragm.

Much of the information taught in earth-space science would not be available if it weren’t for our remote sensing abilities. explain two ways our remote sensing strategies contribute to our knowledge of these topics.

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

What structural formula represents 4 electrons shared between two atoms?