is this won true or false In Earth’s atmosphere, cold air rises and warm air rises. i think it is true becouse of Earth’s atmosphere is cold and hot

Which type of substance ionizes partially and gives off hydrogen ions when dissolved in water? a. strong acid b. strong base c. weak acid d. weak base

Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.

Air can be considered a mixture. which statement does not explain why?