14 Physical and Chemical Properties of Materials

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14 Physical and Chemical Properties of Materials Key Vocabulary chemical property density material physical property

14 Physical and Chemical Properties of Materials What were some of the properties of the materials used to make the drink containers in the previous activity? Record your answer in your notebook.

14 Physical and Chemical Properties of Materials Read the introduction and look for key ideas Steel can be formed into many shapes, and is very durable. This makes it ideal for external building supports and stainless steel medical equipment.

14 Physical and Chemical Properties of Materials How do the properties of materials determine their uses?

14 Physical and Chemical Properties of Materials Physical and chemical properties Physical Properties can be determined without seeking a chemical reaction. Chemical Properties can only be determined by adding another chemical to see if a reaction occurs. What are some examples of physical and chemical properties?

14 Physical and Chemical Properties of Materials Physical properties investigated Color Hardness Luster Light transmission Texture Flexibiliity

14 Physical and Chemical Properties of Materials Chemical property investigated Reaction with hydrochloric acid

14 Physical and Chemical Properties of Materials Safety Wear safety eyewear. If a material does not bend easily, do not use more force because you could break or tear it. Watch out for sharp edges.

14 Physical and Chemical Properties of Materials Complete the procedure

14 Physical and Chemical Properties of Materials Procedure step 3

14 Physical and Chemical Properties of Materials How did you arrange the materials by properties? Share your choices with the class.

14 Physical and Chemical Properties of Materials Categories of materials

14 Physical and Chemical Properties of Materials Analysis question 1 Were your groupings the same as those of the other students? If they were different, explain how.

14 Physical and Chemical Properties of Materials Analysis question 2 Should the shape of an object be considered a property of the material? Explain.

14 Physical and Chemical Properties of Materials Analysis question 3 In this activity, you recorded the color of each material. Think of and explain two cases in which color does not help identify a material.

14 Physical and Chemical Properties of Materials Analysis question 4 In your science notebook, make a copy of the table, “Selecting Materials for Products,” shown below. For each product listed in the first column, complete the table by listing one material you tested that would work well and one that would not work well. Explain your reasons for each choice in the appropriate column.

14 Physical and Chemical Properties of Materials How do the properties of materials determine their uses?

14 Physical and Chemical Properties of Materials Key vocabulary definitions Chemical property - A specific result of a test with a chemical reagent. Chemical properties include pH, the production of a salt when an acid reacts with a metal, or a unique color change in a chemical reaction.

14 Physical and Chemical Properties of Materials Key vocabulary definitions Density - The relationship between the mass and volume of a substance. The mass per unit volume, specifically grams per cubic centimeter, or grams per milliliter. Density equals mass divided by volume (d = m/v). Materials - Physical substances used to make things.

14 Physical and Chemical Properties of Materials Key vocabulary definitions Physical property - A characteristic of a substance or material, such as color, density, flexibility, hardness. These properties help identify pure substances and never change whether there is a large sample or very small sample of material. They are intrinsic properties.