Matter and Change物质的变化.docx

Matter and ChangeUnit 1 Properties of Matter1. What is matter?2. The _ of an object is the amount of matter the object contains.3. Matter that has a uniform and definite composition is called a _.4. How many kinds of matter does a pure substance contain?5. Is the following sentence true or false? All samples of a substance have different physical properties. _ 6. A physical property is a quality or condition of a substance that can be _ or _ without changing the substances composition.7. Circle the letter of the term that is not a physical property?a. Oxidation c. Boiling pointb. Density d. Melting point8. Is the following sentence true or false? A chemist can help identify a substance by its physical properties. _9. What are the two groups into which substances can be classified?10. Is the following sentence true or false? Elements can be separated easily into simpler substances.11. Compounds are substances that can be separated into simpler substances using only _ means.12. Is the following sentence true or false? The properties of compounds are different from those of their component elements. _.States of Matter1. Indicate the letter of the term that is NOT a physical state of matter.a. Waterb. Gasc. Liquidd. Solid2. Complete the table about properties of the three most common states of matter. . Properties of the States of MatterPropertyLeastModerateMostAmount of energyDensityOrderly arrangement of molecules/atomsCompressibilityConstant volumeAbility to change shape3. Is the following sentence true or false? The words gas and vapor can be used interchangeably.4. The term gas is limited to those substances that exist in the gaseous state at ordinary _.5. What is vapor?6. A physical change alters a given material without changing its chemical _.7. What do boiling, freezing, and melting have in common?Mixtures1. What is a mixture?2. Is the following sentence true or false? A homogenous mixture is one that has a completely uniform composition.3. What is another name for a homogeneous mixture?Match each type of solution with an example of it.4. solidsolida. sugar water5. solidliquidb. vinegar6. liquidliquidc. carbon mixed with iron to form steel7. gasliquidd. soda water8. gasgase. air9. Is the following sentence true or false? It is always easy to separate the components in mixtures.10. Distillation is a method of separating a mixture based on which property of the components?11. Describe one way to decide whether a sample of matter is a substance or a mixture.Chemical Substances 1. What do we call the one or two letters used to represent each element in a chemical formula?2. Why do we use chemical symbols?3. What do the subscript numbers in chemical formulas represent?; 4. Is the following sentence true or false? The elements that make up a compound are present in the same proportions for all examples of that compound.5. Use Table 2-4 on page 40 to answer the following questions.a. Pb is the symbol for what element?b. What is the symbol for gold?c. Stilbium is the Latin name for which element?6. What happens in a chemical reaction?7. In chemical reactions, the starting substances are called _ and the substances formed are called _.8. What is a chemical property?9. Circle the letter of the term that best completes the sentence. A chemical change _ results in a change in chemical composition of the substance involved.a. sometimesb. rarelyc. alwaysd. never10. Name four things that you could observe upon mixing two substances that would indicate that a chemical reaction has taken place.11. Which two observations indicate that a gas has been produced by a chemical reaction? 12. During a chemical reaction, the mass of products is always equal to _.of , 13. The law of conservation of mass states that in any physical change or chemical reaction, mass is neither _ nor _.14. Explain how it is easier to demonstrate the law of conservation of mass with a flashbulb th