1. identify the following changes as physical or chemical changes a. baking soda mixes with vinegar and produces carbon dioxide gas. b. the copper coating on the statue of liberty turns green. c. addition of salt melts ice on the highway. d. steam condenses on the windowpane. e. sugar dissolves in a cup of coffee. f. natural gas burns in a furnace.

Identify one similarity between china and europe that explains their decisions on wether to explore or conquer lands around the indian ocean

Which of the following activities would conserve the most energy? installing a dimmer switch on a light using a blender instead of a food processor hanging clothes to dry on a clothesline instead of ironing them opening a window instead of turning on the air conditioning setting your computer's screen saver to turn on after less time has elapsed

Which of the following contradictions best exemplifies why the democratic party struggled during the 1928 presidential election? a. it tried to appeal to religious fundamentalists along with committed secularists. b. it promoted jim crow laws but saw an influx of african american voters to its districts. c. it was forced to publicly endorse prohibition despite the objections of big businesses. d. it relied on the support of both the ku klux klan and roman catholic immigrants.