*Question*
Q: What is destroying the layer of good ozone? Choices: - greenhouse gas - water pollution - climate change - air pollution A:
**Answer**
air pollution

*Question*
Q: Why do electronegativities decrease from top to bottom? Choices: - smaller atomic size - larger atomic variation - larger electric pull - larger atomic size A:
**Answer**
larger atomic size

*Question*
Q: What is the process of capturing a substance or particle from outside the cell by engulfing it with the cell membrane? Choices: - metastasis - autolysis - ectocytosis - endocytosis A:
**Answer**
endocytosis

*Question*
Q: An increase in what, across the periodic table, explains why elements go from metals to metalloids and then to nonmetals? Choices: - neutrons - temperature - protons - electrons A:
**Answer**
electrons