Compare and contrast chemical change and physical change.

Which of these describes how heat is transferred by convection* a. sunlight travels through space without the aid of fluids or solids. b. warm air rises and takes the heat with it, eventually, it cools and sinks c. air at the equator rises and sinks at the poles. d. air molecules touch the warm ground, heating them up *not conduction

Where are the noble gases located in the periodic table? a. in the center b. on the left side c. in the upper right corner d. on the far right side

The poh of a solution is 6.0. which statement is correct? use poh=-log[oh and ph+poh= 14 o o o the ph of the solution is 20.0. the concentration of oh ions is 1.0 x 10-8 m- the concentration of oh ions is 1.0 x 106 m- the ph of the solution is 8.0.