Archaeologists study the remains of ancient people , their bones, and their belongings, to learn about life long ago.

Astronomers study the universe including outer space, sun, moon, stars, and planets.

Biologists study all forms of life including humans, animals, plants, and bacteria, as well as how they work and how the environment affects each organism. 

Botanists study plant life including identifying new plant species and evaluating their parts and uses, as well as studying the effects of pollution (such as acid rain) on plants and working toward environmental protection. 

Chemists study elements, atoms, molecules, as well as matter and its changes. 

Geologists study rocks, minerals, rivers, oceans, and Earth's landforms including mountains, valleys, plateaus, glaciers, hills, plains, and deserts. 

Meteorologists study the atmosphere and weather.

Oceanographers study the ocean including marine life of plants and animals, ecosystems, ocean circulation, and the geology of the seafloor. 

Physicists study motion, forces and energy to explain how things work. 

Zoologists study animal life including physical characteristics of animals and animal behavior.