What type of environment would produce fertile soil at a fast rate

What tribe/group was charlemagne a member of

If the number of electrons in an atom is 39 and the mass number for the same atom is 90, calculate the the following for this atom: a) the number of protons b) the atomic number c) the number of neutrons d) What is the identity of this element?

Southern hemisphere climate

The Sierra Nevada Mountains are extensively hiked and explored by people from all over North America and the world. True/False

What is the waste production for burgers?

Would u think that because we added tar and many other things over the years to the road our road levels would be lower and in the old days would be no fog because the clouds didn't go lower than they do now?

What factors are considered when determining a country's rate of natural increase

A b c or d which one is it

If sun lost all its energy what would happen to earth and its inhabitants

A bag contains 5 red marbles, 3 blue marbles, 7 yellow marbles, and 2 green marbles. Which ratio can be used to compare the yellow marbles to the blue marbles? A) 3 11 B) 3 7 C) 7 11 D) 7 3