The 'Big Bang' of the chemical universe

Big BangScientists believe that the universe began about 13.8 billion years ago with an event called the Big Bang. This theory explains how the universe started as a tiny, hot, and dense point before expanding outward. Over time, matter spread out, forming galaxies, stars, and planets.The Big Bang theory is supported by scientific evidence, including the movement of galaxies, the presence of leftover radiation from the early universe, and the amount of certain elements found in space.

UniverseThe universe is everything that exists, including galaxies, stars, planets, and all of space itself. It is constantly expanding, and scientists estimate that it is about 13.8 billion years old. The universe contains billions of galaxies, each made up of billions of stars and planets. Studying the universe helps scientists understand where we come from, how stars and planets form, and what might exist beyond our solar system.Science and Engineering Practices (SEP): Analyzing and...

Supergiants and SupernovasSome of the largest and most powerful stars in the universe are supergiants. These massive stars are much larger and brighter than our Sun. When a supergiant reaches the end of its life, it can explode in a massive event called a supernova. This explosion releases enormous amounts of energy and spreads elements across space. Understanding supergiants and supernovas helps scientists learn about the life cycle of stars and the formation of new elements in the...

Star PowerStars are massive spheres of hot, glowing gases that produce energy through nuclear fusion. The energy from stars, including our Sun, powers the solar system by providing light and heat. Understanding how stars generate energy helps scientists learn about their life cycles, the formation of elements, and the forces that shape galaxies.Science and Engineering Practices (SEP): Developing and Using Models Scientists develop and use models to study how stars produce energy and interact...

Expansion of the UniverseThe universe is constantly changing. Scientists have discovered that the universe is expanding, meaning that galaxies are moving away from each other over time. This idea was first supported by the work of Edwin Hubble, who observed that distant galaxies appear to be moving away from Earth.The expansion of the universe helps scientists understand how the universe began and how it might change in the future. One major idea that explains this expansion is the Big Bang...

Chemical ReactionsA chemical reaction is a process in which one or more substances are transformed into new substances with different physical and chemical properties. During a reaction, bonds between atoms are broken and rearranged to form new bonds, resulting in products that differ from the original reactants.Science and Engineering Practices (SEP): Analyzing and Interpreting DataScientists use chemical equations and molecular models to represent how atoms rearrange during chemical...