17. Explain the role that the larger nucleus of an oxygen atom plays in creating the polarity of a water molecule.

When fossil fuels are burned, carbon dioxide is released. how does this gas impact the environment?

What happens to a food web when deforestation occurs due to urbanization? how does it effect the carbon cycle? how does this relate to photosynthesis?

Nitrogen-14 and nitrogen-15 are isotopes of the same element. how do these two isotopes differ? a. they have different numbers of nuclei. b. they have different numbers of protons. c. they have different numbers of neutrons. d. they have different numbers of electrons.