Use information from the paragraph to answer the question. Question: When two pieces of metal are rubbing together and oil is added between them the friction decreases or increases? Paragraph : To reduce friction, oil is added to the engine.
decreases

Use information from the paragraph to answer the question. Question: Allen is riding his bike on a path. The course ends up 1000 feet higher above sea level compared to the beginning. At which point is the air resistance lower at the beginning or at the end? Paragraph : At higher elevations, there is less air to press on a given area.
at the end

Q: Use information from the paragraph to answer the question. Question: Sara is in a container representing an object. Her container has 30 balls flying around, representing particles. Tyler is in another container, and his contains 5 balls. Which person's container likely would be under the least pressure Sara's or Tyler's? Paragraph : More particles inside the container means more collisions, and more collisions mean a higher pressure.
A: Tyler's

Question: Use information from the paragraph to answer the question. Question: If Jim is exploring layers of rock and he moves closer to the surface, what happens to the age of the rock older or younger? Paragraph : The main law is the law of superposition. This law states that deeper rock layers are older than layers closer to the surface.
Answer: younger

*Question*
Use information from the paragraph to answer the question. Question: Do electric cars pollute more or less than gas cars more or less? Paragraph : Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids.
**Answer**
less

*Question*
Use information from the paragraph to answer the question. Question: Tim has a quark and pulls it farther away from Rob, who also has a quark. What happens to the attraction force between the quarks it increases or it decreases? Paragraph : Gluons make quarks attract each other more strongly the farther apart the quarks get.
**Answer**
it increases