How are scientific questions answered? OA. Through feelings and guesses B. Through likes and dislikes
C. Through beliefs and opinions
D. Through measuring and observing

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

If two objects at different te,peraure are in contact with each other what happens to their temperature