Earthquakes and volcanic eruption
Sand doesn't directly cause weathering because sand is made via weathering. When rocks get weathered they become sand. But maybe when the sand and wind work together they might be able to weather some rocks
Format Method - Writing the symbol of the cation and then the anion. Add whatever subscripts in order to balance the charges.
Crisscross Method - The numerical value of the charge of each ion is crossed over and becomes the subscripts for the other ion.
I think its 2-, it gained 2 electrons.
Answer:
volume of carbon dioxide gas would be collected during a one-year period.
Explanation:
Mass of carbon dioxide gas collected in a day = 31,000 Tonn
1 Tonn = 1000 kilogram
31,000 Tonn = 
Specific volume of the carbon dioxide gas = 

Volume of carbon dioxide gas collected in a day = V


1 year = 365 days
Volume of carbon dioxide gas collected in a year = V'

volume of carbon dioxide gas would be collected during a one-year period.