"Metal Materials" PPT (second lesson)

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"Metal Materials" PPT (second lesson)

Part One: Teaching Objectives

1. Understand alloys and be able to tell the difference in composition and properties between alloys and pure metals;

2. Know important alloy materials such as pig iron and steel;

3. Know the impact of scrap metal on the environment and the significance of recycling scrap metal.

Metal materials PPT, part 2: common metal materials

Most metallic materials are actually alloys, and do you know why?

Alloys tend to have better properties than pure metals.

1. Common alloys

alloy

A substance with metallic properties formed by fusing one or several metals (or non-metals) together is called an alloy.

2.Steel

Composition: An alloy composed of elements such as iron and carbon.

Steel is the most common and widely used alloy material due to its good mechanical properties.

Metal materials PPT, part three: metal pollution and recycling

1. Sources of metal pollution

① Metal waste discarded in daily life;

② A large amount of industrial waste metal waste;

③ The factory discharges sewage containing heavy metals.

2. Dangers of metal pollution

① Waste a lot of metal resources

② Metals such as aluminum do not decompose by themselves in nature and accumulate in the soil, destroying the soil structure.

③ After toxic metals such as lead and cadmium are corroded, they lead to heavy metal pollution of soil and groundwater sources.

④ Extensive use of leaded gasoline and discarded batteries can cause soil heavy metal pollution.

3.Methods to prevent and control metal pollution

① Sort garbage for recycling

② Classify and recycle various discarded metal materials.

③ Used batteries cannot be discarded at will.

④ Use unleaded gasoline.

Metal Materials PPT, Part 4: Classroom Exercises

1. The World Health Organization identifies aluminum as a source of food contamination, so the following applications of aluminum must be controlled----()

A． Aluminum alloy doors and windows

B. Use aluminum alloy as aircraft material

C. Soda in metal aluminum cans

D. Aluminum metal wire

2. When choosing the metal material for minting coins, the factors that do not need to be considered are ( )

A． Hardness b. price

C. Corrosion resistance D. conductivity

3. In industrial production, two metals are often heated in the same container to fuse them, and after condensation, a fusion material with metallic properties - an alloy is obtained. Based on the melting point and boiling point data of the metals listed in the table below (all other conditions are met), judge whether the alloy that cannot be produced is ( )

A. K—Na alloy B. K—Fe alloy

C. Na-Al alloy D. Fe-Cu alloy

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For more information about the "Metal Materials" PPT courseware, please click the Metal Materials ppt tab.

"End of Chapter Review Lesson" Iron Metal Materials PPT:

"End of Chapter Review Class" Iron Metal Materials PPT Special Topic Summary of the Application of Practice Conservation Method in Chemical Calculations Conservation Relationship Characteristics Mass Conservation Macroscopically: Conservation of mass of substances before and after reaction Microscopically: Conservation of the number of atoms of elements before and after reaction Electron conservation Oxidation and reduction. .

"Integration Improvement at the End of Chapter" Iron Metal Material PPT:

"End-of-Chapter Integration Improvement" Iron Metal Materials PPT Part One Content: Method 1 Common Methods of Chemical Calculation Conservation Method [Typical Example 1] Add 100mL1mol/L to a certain amount of Fe, FeO, Fe2O3 mixture Hydrochloric acid, just enough to completely dissolve the mixture, releases 224..

"Metal Materials" Iron Metal Materials PPT (Application of the quantity of matter in the calculation of chemical equations in Lesson 2):

"Metal Materials" Iron Metal Materials PPT (Application of the amount of matter in the calculation of chemical equations in Lesson 2) Part One Content: Learning Objectives Course Standards 1. Combined with chemical equations to understand the amount of matter, molar mass, gas molar volume, and matter Concepts such as quantity and concentration...

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Update Time: 2024-07-08

This template belongs to science courseware Zhejiang Education Edition Ninth Grade Science Volume 1 industry PPT template

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