Ques: Alkanes with more carbon atoms have higher boiling and melting points, so some of them are solids at room temperature. John was playing with alkanes in his lab. If he decreased the amount of carbon atoms in an alkane, what would happen to the boiling point of that alkane decrease? or increase?
Ans: decrease?

Ques: When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser. Sean is trying to see how fast the water molecules are moving in a container of water. He observes that the molecules are moving very quickly, so the temperature must be cool or warm?
Ans: warm

Ques: Temperature affects the rate at which photosynthesis, cellular respiration and decomposition take place. The rate of reaction increases with increasing temperature and decreases at lower temperatures. john was watching the rate of reactions going on in some plants. he noticed that the rate decreased when the temperatures increased or decreased?
Ans: decreased

Ques: The forest habitat of elephants has also decreased in size due to humans moving in, so the numbers of the elephants have decreased. The elephants were moved to a reservation where they could thrive, since their habitat in the wild had expanded too far. The elephant numbers were now larger or smaller?
Ans:
larger