What useful tool helps scientists work with, understand and make predictions about extremely complex systems?

What useful tool helps scientists work with, understand and make predictions about extremely complex systems?

Correct Answer: speculation
guesses
assumptions
models

Explanation: Scientific models are useful tools for scientists. Most of Earth's systems are extremely complex. Models allow scientists to work with systems that are nearly impossible to study as a whole. Models help scientists to understand these systems. They can analyze and make predictions about them using the models. There are different types of models.

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