100 dobson unit indicate that the ozone layer is……….thick.
a) 3mm
b) 1mm
c) 100 mm
d) 34mm
Non-renewable sources are…………………….
a) solar
b) air
c) iron
d) none
Greenhouse effect is likely to cause a rise of ……….in the average global temperature by the end of the century.
a) 1.5 to 2.5º C
b) 1.5 to 3.5º C
c) 1.5 to 4.5º C
d) 1.5 to 9.5º C
Which of the following is non renewable sources?
a) animals
b) insects
c) natural gas
d) none
Non-renewable sources is/are……………..
a) fossil fuels
b) oil
c) coal
d) diamond
e) all of these
Renewable sources is/are……………………..
a) animals
b) insects
c) water
d) solar
e) all of these
