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.

[EX Q]: Question: If the Earth's orbit moves farther away from the Sun, what happens to the gravitational force between the two planets? 
 Answer: it decreases
[EX A]: This is because the gravitational force of attraction between the Earth and Sun is stronger when the Earth is closer to the Sun.

[EX Q]: Question: Simon was digging in his yard and found that the rocks that were deeper in the ground, compared to the surface rocks, were likely 
 Answer: older
[EX A]: Therefore, deeper rock layers must be older than layers closer to the surface.

[EX Q]: Question: Will had a high frequency photon he was examining. He compared it to Tina's low frequency photon. The photon with less energy was 
 Answer: Tina's
[EX A]:
The higher the frequency is, the more energy a photon has.