(1) A mixture is a combination of two or more substances in which the substances are not chemically bonded together (2) some mixtures have large particles which separate by themselves over time these mixtures are called suspensions

(3) muddy water is an example of a mixture that will become clear as the mud settles to the bottom

(4) Another kind of mixture called a colloid has particles small enough thatthey do not settle
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Bridget is in science class. her teacher gives her two unknown substances and asks her to determine their relative ph. she places a piece of red litmus paper into both substances. the litmus paper turns purple when she places it into substance i. the litmus paper turns blue when she places it into substance ii. a. substance i is a neutral substance and substance ii is an acid. b. substance i is a neutral substance and substance ii is a base. c. substance i is an acid and substance ii is a base. d. substance i is a base and substance ii is a neutral substance.