Scientists use experiments and observations to make logical conclusions about scientific inquiries. this process is called the

scientific process
scientific inquiry
scientific method
scientific experiment

scientific method

Explanation:

A scientific method can be define as a detail and sequential process so as to determine the cause of a natural process. It involves steps such as making a background literature search, conducting observation, forming a hypothesis, conducting experiment based on the hypothesis, and making conclusion based on data obtain after experiment.

it cools slower in the earth meaning the crystals have more time to form than lava on the surface