From sea level, the biosphere goes up about 19km. What is the thickness of the biosphere in meters?

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.

Nh3 +02-no + h20 is unbalanced what is the balanced equation

Math focus 4. calculate a map has index contours at 250 m, 500 m, and 750 m. what is the contour interval?