PLEASE HELP ME ASAP A) How does conductivity relate to ionic and covalent bonds?

B) Glass is covalently bonded. Are the electrons free to move? How is this related to the electrical conductivity of glass

How have the greenhouse gasses increased from the year 2000 to 2018

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.

Read "who built the pyramids? ”. leave this link open while you answer the questions throughout the assignment. give at least two reasons why some people claim the pyramids of giza were constructed by aliens.