PLS HELP ASAP I WILL GIVE THANKS BUT JUST PLS HELP NOW Earth

What is the orbit of the Earth?
Is the Sun at the center of the Earth’s orbit?
Describe the motion of the Earth throughout its orbit? Does it move at a constant speed?

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

Stoichiometry- i need with 14 and 15! an explanation would be appreciated!

What is the daughter nucleus produced a. when 217(at) undergoes alpha decay? b. when 103(mo) undergoes beta decay? c. when 188(hg) undergoes positron emission?