Help with balancing equation and identifying its reaction type please

The equation is already balanced

The type of reaction is decomposition

Explanation:

Step 1 Balancing equation
First list the elements and how many atoms of that element are on each side to find out what we need to balance

CuCO3 ==> CuO + CO2

         3   O   3

         1   Cu   1

         1    C   1

It appears that each element is balanced on each side already so the equation is already balanced.

Next we identify the type of reaction

These are the 4 main types of reactions and this is how they are typically written

Synthesis : A + B ==> AB

Decomposition : AB ==> A + B

Double Replacement : AB + CD ==> AC + BD

Single Replacement : AB + C ==> AC + B          

The given equation, CuCO3 ==> CuO + CO2 appears to follow the decomposition reaction structure, AB ==> A + B as it starts off as a single compound and is decomposed into two or more substances.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.