Q: Rougher surfaces have more friction between them than smoother surfaces.  Eric rubs together tissue paper and then sandpaper. The smoother tissue paper has less or more friction than the sandpaper?
A: less


Q: Bigger atoms have more electrons.  As atoms get larger they are able to attract more electrons or less electrons?
A: more electrons


Q: The density of the atmosphere decreases with an increase in the height above sea level (altitude).  What would happen to the atmosphere as Jim climbed higher up a mountain it would become less dense or it would become more dense?
A: it would become less dense


Q: People in the richer nations of the world use far more energy, especially energy from fossil fuels, than people in the poorer nations do.  Jan lives in a great country and she is rich. Compared to another person in a poorer country, Jan will use an amount of energy that is greater or lesser?
A: greater