Carl Sagan famously said that the death of ancient stars helped to create us. Here's a quick primer on what he meant. Back in , the late Carl Sagan blew minds with the deep thought that those very minds are made from the remnants of blown-up stars. But what the heck does that actually mean? Grade level appropriate observations include: the Sun and moon appear to rise and set in different parts of the sky, and star visibility at night, but not in the day except for our Sun.
The story of where we came from begins in space, a long time ago, even before the Sun and the planets in our solar system formed. A lot of the stuff, the matter, that makes up you and me and everything we see on Earth was formed inside of stars long ago. Once a star is born, it starts to make light and heat, just like our Sun, and, when that happens, it starts creating different kinds of matter inside.
Well, some stars, when they get old and are at the end of their life cycles, will explode and send all of that new matter out into space. Then, later on, when new stars and new planets are forming, some of that new matter ends up in them. That means that you are made of star stuff! A: The Universe and its Stars: The Sun is a star that appears larger and brighter than other stars because it is closer.
Stars range greatly in their distance from Earth. A: Definitions of Energy: The faster a given object is moving, the more energy it possesses. B: Conservation of Energy and Energy Transfer: Energy is present whenever there are moving objects, sound, light, or heat.
When objects collide, energy can be transferred from one object to another, thereby changing their motion. In such collisions, some energy is typically also transferred to the surrounding air; as a result, the air gets heated and sound is produced. Big Ideas: The planets of the solar system and the Sun all formed from a large cloud of gas and dust a long time ago. While there are many stars in the universe, the Sun is the closest one to Earth so it appears to be the largest. Stars vary in size and proximity to Earth.
All stars have a life cycle and some produced the matter that makes up life here on Earth. Some of the patterns in the universe can be observed here on Earth. Boundaries: By the end of 5th grade, students will understand the Sun appears larger and brighter than other stars because of its proximity to Earth. References to time i. In this grade band, no attempt is made to give a precise or complete definition of energy.
Students study planet growth by using a clay model of planetesimals combining to form a planet by investigating volume addition with spheres. The Sun, the Earth and You. In this hands-on activity, students use a model of the particles in the solar wind as determined by the Genesis mission to compare the elements of the Sun and the Earth.
This student-centered lesson supports the cosmic connection to life on Earth. The story of where we came from begins in space. All of the matter that makes up you and me and everything we see on Earth is composed of the chemical elements. If you think about all of the elements on the periodic table, things like oxygen and carbon and iron, almost all of those elements that we see and that make up the stuff around us formed inside of stars long ago.
When the universe was young, before there were any galaxies or stars or planets, the only elements that existed were hydrogen and helium and a little bit of lithium. These are the first and lightest elements on the periodic table.
As time passed in the universe, some of the earliest matter, the hydrogen and helium and lithium, started to clump together. When this happened, it made the first stars. Something really cool can happen inside of stars, where nuclear fusion causes some of the lighter elements to come together, or fuse, and make heavier elements. So, things like hydrogen and helium were fused together to make heavier elements, like carbon, and then those heavier elements could make even heavier elements.
Stars are like big chemical element factories! Even our Sun is currently making new elements inside of it. These explosions can also make new, even heavier elements. Then, later on, when new stars and new planets are forming from the matter in space clumping together, some of these heavier elements end up in them. A: Structure and Properties of Matter: - Substances are made from different types of atoms, which combine with one another in various ways. Atoms form molecules that range in size from two to thousands of atoms.
MS-PS - Each pure substance has characteristic physical and chemical properties for any bulk quantity under given conditions that can be used to identify it. MS-PS - In a solid, atoms are closely spaced and may vibrate in position but do not change relative locations. Stars in the inner galaxy are also older, so this means more of the elements of life were synthesized earlier in the inner parts of the galaxy than in the outer parts.
Holtzman added it is likely that, if there is a minimum required abundance, that minimum was probably reached earlier in the inner parts of the Galaxy than where we are. The catalog is available at the SDSS website , so take a look for yourself at the chemical abundances in our portion of the galaxy. Technical Divisions Collaborate with scientists in your field of chemistry and stay current in your area of specialization. Explore the interesting world of science with articles, videos and more.
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