Question

1. what has helped change scientific ideas of the hadean eon?

new research and computer - generated climate models
new discoveries of minerals in moon rocks
discovery of the zircon crystals in australia

Explanation:

The Hadean eon is Earth's earliest geological period, and scientific understanding of it relies on evidence like ancient minerals. Zircon crystals from Australia (some over 4.4 billion years old) provided key data about early Earth's conditions, revising ideas about the Hadean (e.g., suggesting liquid water existed earlier than thought). While new research/models and moon rock minerals contribute, the zircon discovery is a direct, landmark finding that changed Hadean scientific ideas.

Answer:

discovery of the zircon crystals in Australia