Unit 1a: Introduction to Chemistry

Text Reference:· Chemistry is a Physical Science (1.1)· Matter and Its Properties (1.2)· Scientific Method (2.1)

Focus Question: What are the essential concepts and skills needed to begin the study of chemistry?

Unit Objectives (what you need to know and be able to do on the test):1. Define chemistry and list examples of the branches of chemistry.2. Compare and contrast basic research, applied research, and technological development.3. Distinguish between the physical properties and chemical properties of matter.4. Classify changes of matter as physical or chemical.5. Explain the gas, liquid, and solid states of matter in terms of particles in motion.6. Explain how the law of conservation of energy applies to changes of state.7. Distinguish between a mixture and a pure substance.8. Describe the purpose of the scientific method.9. Distinguish between qualitative and quantitative observations.

10. Describe the differences between hypotheses, theories, and models.

VocabularyChapter 1

• atom• chemical change• chemical property• compound• element• extensive property• gas• heterogeneous• homogeneous• intensive property

• liquid• mass• matter• mixture• physical change• physical property• plasma• products• pure substance• reactant• solid • state (or phase)

Chapter 2• hypothesis• model• qualitative observation• quantitative observation• scientific method• system• theory• variable