Spacecraft carry telescopes and other astronomical instruments above the Earth's atmosphere, and to other planets in our solar system. Biology The science and study of life, from the tiniest microscopic organisms to the largest whales in the sea. Biology studies how living things grow, feed, move, reproduce, and evolve over long periods of time. It covers an enormous range of topics and deals with millions of species of animals, plants, and other organisms. Biology is useful to other sciences and professions that deal with life, such as agriculture , forestry, and medicine.
Chemistry is the study of the composition of substances and the changes that they undergo.
Chemists work with reactions between substances to create plastics, medicines, dyes, and many other materials useful in our modern world. They study what substances are made of, and how they can be altered or combined to create new materials. 92 elements occur in nature, and another 17 have been created in nuclear laboratories. Several million compounds have been synthesised by chemists. There are several branches of mathematics.