Compare convection currents in the ocean with convection currents in the atmosphere. Use complete sentences and give at least two supporting details. Pls make it sound like a sixth grader did it

18. use the activity series to predict whether the following synthesis reaction will occur. write the chemical equations for the reaction if it's predicted to occur. (s) + o2(g) -> *note: it is possible.*

If you burn 10 kilograms of wood in a fire (combustion) what is the weight of the products after the fire has finished burning the wood?

Chemistry worksheet - i am not sure what they are asking for exactly?