EESB15H3 Lecture Notes - Lecture 7: Formation And Evolution Of The Solar System, Silicate Minerals, Space Rock
10 Dec 2016
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The crust of the planet began to form 4000 million years ago. This most primordial time in our pla(cid:374)et"s history is called the hadea(cid:374). The hadea(cid:374) eo(cid:374), archea(cid:374) eo(cid:374) a(cid:374)d the proterozoic eo(cid:374) comprise of about 87% of the earth"s history. The oldest k(cid:374)o(cid:449)(cid:374) crustal rocks fou(cid:374)d i(cid:374) ca(cid:374)ada are 4. 03 billion years old. All 8 planets revolve around the sun. Their orbits are approximately in the same plane. The planets rotate in the same direction. As planets spin, their axes are tilted. With few exceptions, each moon mimics the (cid:373)o(cid:448)e(cid:373)e(cid:374)ts of it"s pla(cid:374)ets. The hypothesis proposes that the solar system distilled from a rotating cloud of dust particles and gases called the solar nebula. Accretion: the process of accumulating bits of matter around an initial mass. Protoplanets: growing bodies due to the accretion of the solar nebula. Meteorites: meteors that survive the heat and reach the ground.
