(dumb it down a lot and make it seem like an 8th grader wrote it and only use 2 sentences for each part)

Question

An unlabeled hierarchical diagram of various astronomical bodies is shown below. The labels A, B, C and D can be used to represent the galaxy, Mars, universe, moon, and solar system.

An image of four circles nestled one within the other is shown. The lower boundary of all four circles touch one another. The largest and the outermost circle is labeled A. The next circle in order is labeled B. The next circle is labeled C. The innermost circle is labeled D.

Part 1: Which four astronomical bodies would you choose to represent the four labels in the diagram?
Part 2: Explain why the hierarchical level D is different from the rest.

Answer 1

Part 1: I would choose the universe for label A because it contains everything. Label B would be for a galaxy since it's a big collection of stars, and I'd pick the solar system for label C because it has all the planets orbiting a star. Lastly, Mars fits perfect for label D because it's just one planet that we can land on.

Part 2: Hierarchical level D is different because it's just one small planet, while the others are much bigger and contain many more things. The universe, galaxy, and solar system are like big boxes, but Mars is just a toy inside one of those boxes.