How do you calculate the avarage atomic mass?

Which of the following is the most likely outcome of global warming

Need the diagram below, which is not drawn to scale, shows the position of the earth, moon, and sun. what type of eclipse occurs when the earth, moon, and sun are lined up in the order shown? a. planetary eclipse b. solar eclipse c. martian eclipse d. lunar eclipse

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above