_____ created oxygen in the early atmosphere. photosynthetic bacteria, asteroids hitting the earth, plankton, volcanic eruptions
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<h2><u>Science</u></h2>
Science is the study of the natural world or physical universe.It is the knowledge of anything that can be verified by experiments.Science is organised into different fields of study. These fields are physics, chemistry, biology, geography, Earth science, geology, resource science, mathematics, nutrition, astronomy, biotechnology, engineering, computer and information technology.
<h2><u>Additional Information</u></h2><h2><u>Scientists</u></h2>Scientists are people who study science.They use observation, experimentation and theory to collect facts and learn about a subject.They perform experiments and record their results which form the basis of science and the scientific knowledge around us.Scientists gain knowledge in the different fields of science by using specific ways and methods.
<h2><u>Laboratory</u></h2>A laboratory or lab is a building or a part of building fitted with scientific equipment.
Scientists do experiments in labs.
Labs in schools and colleges are the classrooms where practical learning and demonstrations take place