Which two methods do scientists use to gather iformation?

Empirical evidence is information collected through observation or experiment. It's the heart of the scientific method because it's how we test out our ideas. Scientists collect data and come up with an explanation for what they're seeing.

Explanation:

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter  

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)