Textbook Notes (368,317)
Canada (161,798)
Biology (653)
BIO211H5 (4)
Chapter 1

Chapter 1 Earth as a System.docx

3 Pages
Unlock Document

Michaelde Braga

Chapter 1 Earth as a System Origin of the Solar System: - Age of the universe: Big Bang ~15 billion years ago - Planets formed near time of sun’s formation - Earth is approximately 4.6 billion years old - Outer planets composed of volatile elements - Inner planets are rocky Earth is Special: - Distance from the sun and the size of the sun itself produce temperatures at Earth’s surface that allow complex carbon compounds to survive and enter into chemical reactions - Has a large mass which allows life-supporting fluids through gravitational attraction - Small enough that gravity does not attract meteorites (unlike Jupiter) Moon: - Moon formed from impact of a protoplanet with Earth Earth’s Structure: - Seismic waves: large vibrations that travel through Earth as a consequence if natural earthquakes or artificial disturbances such as nuclear explosions - Focus: place within Earth where rocks move against other rocks along a fault and produce seismic waves - Fault: surface along which rocks have broken and moved Core: Earth’s center. - Solid spherical inner portion and liquid outer portion consist of iron Mantle: thick envelope around the outer core - Complex body of less dense rocky material - Constitutes most of Earth’s volume Crust: Consists of still less dense rocky material Moho Discontinuity: Passage of seismic waves from the rocks of the crust to the denser rocks of the mantle - Allows upper and lower lithosphere to slide past each other (friction is what cause earthquakes) - Because continental crust is thicker than oceanic crust, the Moho dips downward beneath the continents Lithosphere: rigid layer formed by the attachment of the crust and upper mantle (least dense) Asthenosphere (aka low-velocity zone): - Seismic waves slow down as they pass through it - Composed of partially molten rocks – slush-like material consisting of solid particles with liquid occupying the spaces in between - Mobility of this layer lets the lithosphere to move over it Plate Tectonics: mov
More Less

Related notes for BIO211H5

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.