All matter on earth contains energy

9. write the chemical equation for the following word equations. include symbols for physical states in the equation. a. solid zinc sulfide + oxygen gas -> solid zinc oxide + sulfur dioxide gas b. aqueous hydrochloric acid + aqueous barium hydroxide -> aqueous barium chloride + water

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

An observation that requires measurement is called quantitative observable or qualitative