development of life of Earth

Question 1

list the early conditions on earth which allowed life to develop

Answer 1

1) presence of liquid water
2) temperature range
3) atmospheric gases
4) solar insulation

Question 2

how does the presence of liquid water allow for the development of life

Answer 2

all organisms need water for survival

1) solvent- where most chemical reactions occur
2) transport within organisms- nutrients ect
3) temperature control - the evaporation of water absorbs heat causing a cooling effect
4) expansion when it freezes- causing it to become less dense and float preventing the convection current which may have cooled the water body and hence creating an insulating effect
5) high specific heat capacity- warms and cools very slowly therefore creating a stable environment
6) absorption of UV radiation -

Question 3

how does Earths temp range allow for the development of life

Answer 3

most areas on earth are between 0-35 degrees so areas are warm enough to have liquid water but not too hot as to denature proteins

Question 4

how do atmospheric gases allow for the development of life

Answer 4

1) CO2= photosynthesis and the synthesis of carbohydrates, proteins and lipids
2) Nitrogen for protein synthesis

Question 5

how does solar insulation allow for the development of life

Answer 5

1) provides energy from photosynthesis
2) heat produced drives the water cycle
3) warms the oceans