Earth’s first atmosphere likely consisted of ____________________ and ____________________, the most abundant
gasses in the universe. Fill in the blank(s) with the appropriate word(s).
hydrogen, helium
helium, hydrogen
Environmental & Atmospheric Sciences
You might also like to view...
Autotrophic organisms are ________.
A. the base of the food web B. able to photosynthesize C. able to chemosynthesize D. All of these are correct. E. None of these is correct.
Environmental & Atmospheric Sciences
Different cultural groups can have the same cultural trait(s)
Indicate whether this statement is true or false.
Environmental & Atmospheric Sciences
Most of the water in the Colorado River comes from ____.
A. Great Salt Lake B. snow melt in the Rocky Mountains C. glaciers in Canada D. aquifers in Wyoming E. lakes in Montana
Environmental & Atmospheric Sciences
All of China's major manufacturing regions are in the ________ half of the country
A) northern B) southern C) eastern D) western
Environmental & Atmospheric Sciences