Alkanes with more carbon atoms have higher boiling and melting points, so some of them are solids at room temperature. Compared to an item with many carbon atoms an item with few carbon atoms will boil faster or slower?
faster

In electromagnetic waves with higher frequencies, photons have more energy. If Mona is standing in the sun and it begins to shine brighter, what happens to the amount of energy the photons are emitting decreases or increases?
increases

Q: The older a person is, the greater their chance of developing a cardiovascular disease. An elderly person has a higher or lower risk of developing a cardiovascular disease than a young person?
A: higher

Question: Many of the worlds people live with water scarcity, and that percentage will increase as populations increase and climate changes. John's town used to have little water, back when there were several thousand people. However, now that the town holds only a few hundred people, the water availability is scarce or plentiful?
Answer: plentiful

*Question*
However, the melanocytes of people with darker skin produce more melanin. Jim's skin was noticeably lighter than his friend Matt's skin. This means that Jim or Matt produces more melanin?
**Answer**
Matt

Lower rock layers were laid down earlier, so they are assumed to contain older fossils. Gerald laid down many rock layers. The layers on the bottom level were likely laid first or last?
first