Semester Science Exam Notes-Questions and Answers Graded A+

Semester Science Exam Notes-Questions and Answers Graded A+ What step is the first step in the scientific method? - ANSWER-Identify the problem What is the SI unit of mass? - ANSWER-Kilogram (kg) All substances are made of what? - ANSWER-Atoms The nucleus is made up of? - ANSWER-Protons/Neutrons All elements are a mixture of what? - ANSWER-isotopes Chemical behavior of different elements is determined by the number of electrons in the? - ANSWER-outer energy levels/valence electrons Solutions characterized by the formation of hydroxide ions are? - ANSWER-Base Combination of two or more components that retain their identity is a? - ANSWER-Mixture Densely packed ever-changing arrangements of atoms and molecules is a? - ANSWER-Liquid What change of state releases thermal energy? - ANSWER-Condensation What type of bonding takes place when Na+ and Cl- combine to form NaCI? - ANSWER-Ionic Glass in an example of? - ANSWER-Liquid and Solid How many physical states of matter is found on Earth? - ANSWER-4 states Tomatoes have a Ph of 4 they are considered to be? - ANSWER-Acidic Solutions containing a substance that produces Hydrogen ions in water are? - ANSWER-Acid Violates Law of Conservation of Energy - ANSWER-H2+Cl=2HCl Minerals? - ANSWER-Solid, Inorganic, Natural Not used to identify minerals? - ANSWER-Magnetism