instruction:
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:
Question: Don is looking at electromagnetic waves, and sees that the one's he observing have higher frequencies. Don is able to know then that the photons have energy that is 
 Answer: higher
answer:
In electromagnetic waves with higher frequencies, photons have more energy.


question:
Question: Carbon dioxide levels increasing cause the temperature to 
 Answer: increase
answer:
An increase in greenhouse gases leads to greater greenhouse effect.


question:
Question: Mark studies rocks for a living. He is curious if rocks deeper in the Earth will be warmer or cooler. If Mark were to take the temperature of a rock that is half a mile into the Earth's surface, and then take the temperature of a rock 1 mile into the Earth's surface, he would find that the rock half a mile into the Earth's temperature is 
 Answer: lower.
answer:

Temperature increases with depth inside the Earth, so melting of rocks is more likely to occur at greater depths.