Sometimes even scientists have to guess. Scientists make theories about how things work and then they test them.
Scientific investigations can get pretty complicated. That is why all scientists use the same method to help them organize their observations and test their theories.
Outcomes are the results of an experiment or trial. Identifying possible outcomes is one way to make predictions.
To solve science mysteries, scientists have to be good detectives. That means they spend a lot of time observing and collecting information.