At a new years party Mary brought an expensive bottle of champagne for the host. Just before midnight she goes and finds a corkscrew to open the bottle. She places the corkscrew on the cork and begins twisting it, making the corkscrew push itself into the cork so she can open the bottle easier. Will the force applied to the corkscrew's inclined plane have increased or decreased after Mary finishes twisting it?
Ans: increased

Tree city and Leaf city were the two biggest cities in Boulderland. Tree city burned lots of gas and other fossil fuels, while Leaf city was very protective towards its environment. Which city caused more acid rain?
Ans: Tree

Two continents had different histories. Asia was inhabited by many humans which destroyed most natural habitats through their activities. America was protective towards its environment and therefore thrived. Which continent caused fewer animal extinctions?
Ans: America

Two rural communities from Jones county took different approaches on rural development as a means of adapting to increasing urbanization. Kent village remained traditionally centered on the exploitation of land-intensive natural resources such as agriculture and forestry. Long Grove on the other hand took a wider perspective and created more focus on a broad range of development goals rather than merely creating incentive for agricultural or resource based businesses. Education, entrepreneurship, physical infrastructure, and social infrastructure all played an important role in developing Long Grove village. Which village took a less complex approach to rural development?
Ans: Kent