Here's a breakdown of what that means:

* Systematically: Scientists use a structured approach to their work, following the scientific method, which involves observation, hypothesis formation, experimentation, data analysis, and drawing conclusions.

* Studies the structure and behavior: Scientists investigate how things are made (structure) and how they function (behavior). This can involve examining the physical properties of matter, the processes of life, the dynamics of the universe, and more.

* Physical and natural world: Scientists explore everything from the smallest particles to the vastness of space, from the microscopic world of cells to the complex interactions within ecosystems.

* Observation and experiment: Scientists gather information through careful observation of the world around them, and they conduct controlled experiments to test their hypotheses and gain deeper understanding.

Here are some key qualities of a scientist:

* Curiosity: Scientists are driven by a desire to understand the world around them.

* Critical thinking: Scientists analyze information, evaluate evidence, and draw logical conclusions.

* Problem-solving skills: Scientists use their knowledge and skills to find solutions to problems and answer questions.

* Communication skills: Scientists need to effectively communicate their findings to others.

The term "scientist" can refer to a wide range of individuals with different areas of expertise, including:

* Biologists: Study living organisms

* Chemists: Study matter and its properties

* Physicists: Study the fundamental laws of nature

* Astronomers: Study celestial objects

* Geologists: Study the Earth's structure and history

* Psychologists: Study human behavior and mental processes

Ultimately, a scientist is someone who actively seeks to understand the world through rigorous investigation and evidence-based reasoning.