Scientists ask the questions "Why?" and "What if...?". A scientist is a seeker of cause and effect. The more formal aspects of research - hypothesis, dependent and independent variables, controls - have developed as assurances that the cause and effect that are observed are truly linked, and not just an accident or an interpretation.
Science is everywhere. Some scientists seek out knowledge about the Earth and the life on it, some about the universe, some work on artificial things such as man-made materials or computer algorithms. However, the search is always on for an increase in knowledge, the making of connections in a cause-effect pattern, and an exchange of information with others.