Worldwide, the total number of land animals killed for food every hour is 8 thousand animals O 500 thousand animals 0 1 million animals 8 million animals​

Ateacher gives students four liquids commonly found in the kitchen - vinegar, apple juice, dish detergent, and milk - and ph indicator strips, which measure acidity. the teacher asks the students to put the liquids in order from most acidic to most basic. what type of investigation could the students conduct to determine the correct order for the liquids?