Scientists discovered that stars in the universe are mostly composed of which elements?

What is the mercury length of time for one revolution around the sun?

Acity experiences a heavy rainfall. days later, when no rainwater is present, rock, debris, and soil fall down a steep hill. which type of mass movement does this describe? a. creep b. landslide c. mudflow d. slump

How many volcanoes are in australia, and how many are active