In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

Question: Rick had a rock (Rock A) from 1000 feet beneath the crust's surface. He later dug 3000 feet deeper and got a second rock (Rock B). Which rock is likely older? 
 Answer: Rock B
Older rocks are at the bottom and younger rocks are at the top.

Question: If Jim climbs to the bottom of a mountain and takes the temperature after taking the temperature at the top of the mountain, which area will he get a higher reading at? 
 Answer: bottom of the mountain
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.

Question: Kathy did some experiments on two different alkanes and one of the alkanes had twice as many carbon atoms than the other. She would notice that which alkane would require a lower temperature to melt 
 Answer: alkane with fewer carbon atoms

Alkanes with more carbon atoms have higher boiling and melting points, so some of them are solids at room temperature.