Atmospheric pressure is about 100 kPa at sea level. What would the air pressure be at 10,000 meters above sea level? about 30 kPa
0 kPa
about 150 kPa
the same, 100 kPa

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed