A2.1 origin of cell

Question 1

primordial soup

Answer 1

early oceans of earth, rich in simple carbon based compounds

Question 2

when did life originate

Answer 2

between 3.5-3.9 billion years ago

Question 3

conditions on early earth

Answer 3

• high surface temperatures (75-95oc)
• entire surface of earth was water

Question 4

what happened when asteroids bombarded earth

Answer 4

comets and asteroids went to earth which brought water and other compounds to planet
methane and ammonia gases where released due to collisions and volcanic erruptions

Question 5

what was the atmosphere composed of

Answer 5

methane and ammonia formed most of earths atmophere + water vapour and higher co2 concentration

Question 6

what caused the extreme weather in early earth

Answer 6

no ozone layer due to lack of oxygen.
inner coe was much hotter and increased motion
this meant smaller protective magnetic fiels= more cosmic solar radiation

Question 7

necessar percurser to the orgin of life

Answer 7

formation of simple carbon based compounds- percurser to complex molecules then organic molecules which provide the structural and functional components for cells to survive

Question 8

what made the early earth have a reducing atmophere

Answer 8

lack of oxygen, high porportions of reducing gases like methane and ammonia