What is a loop of relatively cool gas that extends above the photosphere

What's the weather like where you live?

Russia is to the east if germany ? true or false

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