Branches of science

Science helps us learn about our world. There are three main groups. One group looks at how people act. This is called social science. Another group looks at things in nature. This is called natural science. It includes life science and physical science. Physical science looks at things that are not alive. This includes the study of rocks and the ocean. A third group uses rules and numbers. This is called formal science. It uses math and logic. Science is a way to find new things!

Science is a way to learn about our world. Scientists study many different things. They group these studies into three main areas.

One area is formal science. This group uses rules and systems. It includes math, which studies numbers and shapes. It also includes logic. Logic is the study of rules for arguments. Other parts include statistics, which is the study of data. These tools help all other scientists work.

Another area is natural science. This group looks at the natural world. It has two main parts. Life science, or biology, studies living things. Physical science studies things that are not alive. This includes physics, which looks at how matter and energy move. It also includes chemistry. Chemistry is the study of matter and how it changes. Earth science is another part. It studies our planet. This includes geology, which is the study of rocks. It also includes oceanography, the study of the ocean.

The last area is social science. This group studies how people act in groups. This helps us understand culture and human behavior. All these sciences work together to help us understand everything.

Science is a huge way of learning about our world. To make it easier to study, people divide science into three major groups. These groups are called formal sciences, natural sciences, and social sciences. Formal sciences focus on abstract structures and rules. They use a special way of thinking called a priori methodology. This means they rely on definitions rather than looking at the real world. Natural sciences study the things we see in nature. Social sciences look at how people act in groups and cultures. Together, these groups help us understand everything from tiny atoms to huge galaxies.

Natural science works by observing things and doing experiments. Scientists use these observations to predict what might happen next. This group is split into life science and physical science. Life science is often called biology. Physical science studies things that are not alive. This includes physics, which looks at matter and energy. It also includes chemistry, which studies how substances change. Earth science is another big part of physical science. It looks at our planet through many different lenses.

Formal science provides the tools that other scientists need. One important part is mathematics. It studies things like quantity, structure, space, and change. Another part is logic, which studies the rules of arguments. Logic has been studied in philosophy since ancient times. In the mid-19th century, people began studying it in mathematics too. Statistics is another tool used to collect and organize data. There is even a field called information science. This field studies how we collect, move, and protect information.

There are many specific names for these scientific fields. Geology is an Earth science that studies rocks and how they change. Oceanography is the study of the ocean. Physics is one of the oldest subjects. For a long time, it was part of natural philosophy. During the 16th century, the natural sciences became their own separate research areas. Chemistry is a specialized physical science. It focuses on atoms, molecules, and how they react. Even the study of the human body uses these ideas through biochemistry.

All these different branches often work together. This is called interdisciplinarity. For example, a scientist might use math to solve a physics problem. This connection helps create applied sciences like medicine and engineering. Some fields even overlap, such as biophysics or quantum chemistry. These special areas use tools from more than one group. By working together, these sciences help us build a complete picture of the universe. They turn many small facts into one big understanding of how things work.

Science is the organized study of our universe through observation and reasoning. To manage this vast amount of knowledge, researchers divide science into three major groups. These groups are the formal sciences, the natural sciences, and the social sciences. Formal sciences study abstract systems and rules rather than the physical world. Natural sciences focus on understanding natural phenomena through empirical evidence. Social sciences examine human behavior within social and cultural contexts. Together, these basic sciences form the foundation for applied sciences like medicine and engineering.

Formal sciences operate using an a priori methodology. This means they rely on definitions and rules instead of real-world observations. While some debate if this constitutes a true science, these methods are vital for testing scientific models. Logic is a key part of this group and studies valid rules of inference. It analyzes how one proposition leads to a conclusion based on other premises. Mathematics is another pillar, traditionally covering arithmetic, algebra, geometry, and analysis. These areas study quantity, structure, space, and change.

Other formal disciplines provide specialized tools for research. Statistics is the study of collecting, organizing, and interpreting data. A statistician uses these methods to plan surveys and experiments. Information science focuses on the analysis, storage, and protection of information. Systems theory is a transdisciplinary field that studies general principles of all systems. This includes self-regulating systems like the human body or global ecosystems. Decision theory studies how agents make choices, splitting into normative and descriptive branches. Theoretical computer science applies mathematical topics to the study of computing.

Natural science relies on empirical evidence from observation and experimentation. Scientists use peer review and repeatability to ensure their findings are valid. This group is divided into life science and physical science. Life science, or biology, studies living organisms. Physical science focuses on non-living systems. It includes branches like physics, chemistry, astronomy, and Earth science. Many physical sciences also study biological phenomena, creating overlapping fields.

Physics is one of the oldest academic disciplines. It studies matter, its motion through spacetime, energy, and force. During the 16th-century Scientific Revolution, physics emerged as a unique research program. Chemistry is another physical science that studies the composition and properties of matter. It specifically looks at how substances, atoms, and molecules change during reactions. Specialized fields like biochemistry study substances in living organisms. Physical chemistry uses concepts like thermodynamics to study chemical processes.

Earth science, or geoscience, studies the planet Earth. It is a unique case in planetary science because Earth is the only known life-bearing planet. Geology is a major part of Earth science and focuses on the solid Earth. It studies rocks and the processes that change them over time. Geology can also include studying the features of Mars or the Moon. Oceanography, or marine science, is another branch that studies the ocean. Earth scientists often use tools from physics, chemistry, and biology to understand these systems.

Modern science is highly interconnected through interdisciplinarity. This means different scientific fields often work together to solve problems. Specialized disciplines may exist in multiple categories at once. For example, biophysics and quantum chemistry combine physics with other areas. These connections allow the basic sciences to support applied sciences. Engineering and medicine rely on the deep knowledge provided by these various branches. By combining different perspectives, scientists create a complete understanding of the universe.