The surface is heated by the Sun and some of that heat radiates back into the air. This makes the temperature higher near the surface than at higher altitudes. Having read the above passage, choose the right answer to the following question (choices are Surface or Mountain Peak ): Paul started at the base of a mountain and climbed to its peak. The sky was clear and the sun was beating down on him all day. However, he noticed there was a clear temperature difference between the surface's temperature and the temperature at the top of the mountain peak. Where would he feel more heat Surface or Mountain Peak?
Surface

If the gas is heated, the particles will move faster as they gain more energy. Having read the above passage, choose the right answer to the following question (choices are they would move faster or they would move slower ): If John heats a gas in his bunsen burner, what would happen to the gas particles they would move faster or they would move slower?
they would move faster

Q: Greater use of oil and other fossil fuels causes more pollution. Having read the above passage, choose the right answer to the following question (choices are increases or decreases ): Mona lives in a city that doesn't use much oil. If the mayor of that city decides to change their policy and the city begins using more oil, what happens to the amount of pollution generated by the city increases or decreases?
A: increases

Question: Richer nations use far more energy resources, especially fossil fuels, than poorer nations do. Having read the above passage, choose the right answer to the following question (choices are the people in the United States or the people in the Democratic Republic of Congo? ): Between the United States, the richest nation in the world, and the Democratic Republic of Congo, the poorest nation in the world, which uses less gasoline per capita, the people in the United States or the people in the Democratic Republic of Congo??
Answer: the people in the Democratic Republic of Congo?

*Question*
With a higher the concentration of hydrogen ions, a solution is more acidic and has a lower pH. Having read the above passage, choose the right answer to the following question (choices are decrease or increase ): If Jim wants to lower the pH of his solution he should do what to the concentration of hydrogen ions inside of it decrease or increase?
**Answer**
increase

For a given medium, sound has a slower speed at lower temperatures. Having read the above passage, choose the right answer to the following question (choices are slower or not as slow ): Greta yells across the canyon in the cool morning and again in the hot afternoon. The sound likely traveled slower or not as slow in the morning?
not as slow