The scientific theory for the origin of our solar system, involving the condensation and collapse of
interstellar material in a spiral arm of the Milky Way galaxy, is the ____________________ theory. Fill in the blank(s) with the appropriate word(s).
Q. 2 -
When the universe originated, it was composed of 100 ____________________ and
____________________, but now consists of ____________________ hydrogen and 2
____________________ elements. Fill in the blank(s) with the appropriate word(s).
Q. 3 -
When the universe originated, it was composed of 100 ____________________ and
____________________, but now consists of ____________________ hydrogen and 2
____________________ elements. Fill in the blank(s) with the appropriate word(s).
Q. 4 - Global warming is caused by increased concentrations of ____________________ in the atmosphere Fill in the blank(s) with the appropriate word(s).
Q. 5 -
Earths human population reached ____________________ in 2011 and is prjected to be
____________________ in 2045. Fill in the blank(s) with the appropriate word(s).
Q. 6 - Theories are formulated through the process known as ____________________. Fill in the blank(s) with the appropriate word(s).
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