{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Human evolution 1 ratio of c 14 unstable to c 12

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Human Evolution: 1. Ratio of C-14 (unstable) to C-12 (stable) is measure -parent: C-14; daughter is C-12 2. Half life: time it takes for half the radioactive isotope to decay -Ex/ after four half lives, only 6.25% C-14 is left (of the original carbon-14) 3. See chart -decay curve: we will be given the age of half life 4. ON TEST: -humans as primates: -opposable thumbs -long, thin straight fingers (motor skills) -finger nails instead of claws (for dexterity) -shoulder sockets -forward facing eyes 5. Fossil Trends: -position of foramen magnum -brain stem location; ape is at back, human is more at center -cranial capacity -ape: small; human: large -canine teeth -ape: long and sharp; human: short and dull -brow ridge -ape: protruding; human: flat -brow ridge did not fully disappear; it grew into more of a forehead -the brain cavity is bigger (frontal lobes for judgement, reasoning) -face below brow -ape: protruding; human: flat (humans not need to carry things in mouth anymore) 6. S...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online