Task: Paraphrasing
Input (English): Question: Heat transfer by conduction occurs when molecules? 
Answer: collide with other molecules. 
Sentence: Heat transfer by conduction occurs molecules collide with other molecules.
Output (English): Conduction is a form of heat transfer that takes place when it comes into contact with matter , the atoms and molecules move and they in turn collide with other atoms or molecules so the heat is transferred, making them move too.