life on earth

Question 1

vital for DNA and proteins to interact with the environment to carry out reactions needed for life

Answer 1

liquid water

Question 2

allows photosynthetic organisms to survive

Answer 2

liquid water

Question 3

produces oxygen and biomass an essential component of the atmosphere

Answer 3

liquid water

Question 4

two possible sources of water

Answer 4

volcanism & icy meteors from the outer regions of the solar system

Question 5

drives the different systems necessary to support life on earth

Answer 5

heat source

Question 6

is caused by the radiogenic heat from the radioactive decay of the materials in the core and mantle

Answer 6

internal heating of the earth

Question 7

provided by the sun in the form of radiation which enters the earth

Answer 7

external heating from the sun

Question 8

is responsible for the occurrence of greenhouse phenomenon, a natural process which maintains heat

Answer 8

atmosphere

Question 9

vital for photosynthesis

Answer 9

atmosphere