Glossary atmosphere the mixture of gases surrounding

  • No School
  • AA 1
  • 6

This preview shows page 3 - 6 out of 6 pages.

Glossary Atmosphere = The mixture of gases surrounding a planet. The composition of the
Image of page 3
Earth’s atmosphere has played a critical role in the development of life on Earth. Accretion = The process by which an object collects matter. For example, planet formation takes place as material orbiting a star gathers together through gravitational or electrostatic attraction, forming larger and larger bodies over time. Asteroid = Small rocky, icy, and metallic celestial bodies left over from the formation of the Solar System which can range from a few meters to several hundred kilometers in width. Atmosphere = The mixture of gases surrounding a planet. The composition of the Earth’s atmosphere has played a critical role in the development of life on Earth. Late Heavy Bombardment = a hypothesized event thought to have occurred approximately 4.1 to 3.8 billion years (Ga) ago, at a time corresponding to the Neohadean and Eoarchean eras on Earth. Nebula = a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter. Dwarf planet = a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such. Protostar = very young star that is still gathering mass from its parent molecular cloud
Image of page 4
Supernova = powerful and luminous stellar explosion. Spacetime = any mathematical model which fuses the three dimensions of space and the one dimension of time into a single four-dimensional manifold. Spacetime diagrams can be used to visualize relativistic effects, such as why different observers perceive where and when events occur differently. Bigbang = cosmological model for the observable universe from the earliest known periods through its subsequent large-scale evolution.
Image of page 5
Image of page 6

You've reached the end of your free preview.

Want to read all 6 pages?

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors