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

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite

I’m his published 95 theses,martin luther protested against? a-the selling of indulgences within the catholic church b-the belief in predestination c-the worshipping of statues of saints d- the catholic church focus on faith as the sole means of salvation

What type of coastline is commonly found along the western side of the america’s