Which of the following is not one of the four basic components of earth's physical systems?
a) atmosphere
b) biosphere
c) lithosphere
d) myosphere

The current is like a stream or river in the ocean true or false

Name one type of data that h-r diagrams do not show.

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