instruction:
In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
question:
Question: How does the liquid in a thermometer respond to heat or cold? Answer: expands or contracts
answer:
The liquid in a thermometer expands or contracts to respond to heat or cold.


question:
Question: What parts of the planet does solar energy have difficulty reaching? Answer: poles
answer:
Poles parts of the planet does solar energy have difficulty reaching.


question:
Question: What is the process in which a substance naturally moves from an area of higher to lower concentration called? Answer: diffusion
answer:

Diffusion is the process in which a substance naturally moves from an area of higher to lower concentration.