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: When an item is lighter and is gliding across something it will have 
 Answer: less friction
Heavier objects press together with greater force, and this causes greater friction between them.

Question: If an item has few carbon atoms its boiling point will be 
 Answer: low
Alkanes with more carbon atoms generally have higher boiling and melting points.

Question: Fred had a bundle of sticks and rubbed them together to build a fire. The molecules in the wood became _____ due to Fred's motion. 
 Answer: faster

Friction causes the molecules on rubbing surfaces to move faster, so they have more heat energy.