Category Past Questions

1. What is the primary purpose of using a balance in the laboratory?A) To measure volumeB) To measure massC) To mix solutionsD) To heat substancesAnswer: B) To measure mass 2. Which of the following is a safety precaution when working…

1. What is the basic unit of matter?A) MoleculeB) AtomC) CompoundD) ElementAnswer: B) Atom 2. Which of the following is a chemical change?A) Ice meltingB) Sugar dissolving in waterC) Iron rustingD) Water boilingAnswer: C) Iron rusting 3. What is the…