I Believe that would be the opium war?
Before Constantine. The first recorded official persecution of Christians on behalf of the Roman Empire was in AD 64, when, as reported by the Roman historian Tacitus, Emperor Nero attempted to blame Christians for the Great Fire of Rome.
Answer:
two examples of things studied in the earth sciences are rocks and landscape features.
Explanation:
there's actually A LOT you can learn in earth science, so rocks and landscape features are just two examples. if you want even more specific examples, there's igneous rocks and sedimentary rocks, and there's also landscape features like glaciers and eolian systems (both of these you can find naturally on the earth).