"Stay Away from Toxic Substances" Chemistry and Health PPT Courseware Download

Description

"Stay Away from Toxic Substances" Chemistry and Health PPT courseware download, 16 pages in total.

Knowledge review

Knowledge point 1: Prevent heavy metal salt poisoning

1. Heavy metal salts refer to inorganic salts containing heavy metal elements such as __________________.

2. Proteins will denature and lose their original physiological functions when they ________ or encounter substances such as concentrated nitric acid, ____________, formaldehyde, etc.

3. Use alcohol, iodine or _______ to sterilize and disinfect.

Knowledge point 2: Don’t eat spoiled food

1. Spoiled food contains toxic ___________.

2. Mycotoxins

(1) A class of natural organic compounds with small molecular weight;

(2) Chemical properties _____, can only be completely destroyed at high temperatures;

(3) Among mycotoxins, __________ is the most toxic and widely exists in spoiled peanuts, corn, wheat, cereals and other agricultural products.

(4) Harm: Mycotoxins can cause neurological and endocrine disorders, carcinogenesis, teratogenesis, liver and kidney damage, etc.

Example analysis

►Type 1 Protein denaturation

Proposition perspective: Test students’ understanding of protein denaturation

Example 1 Enzyme-added laundry detergent can easily remove sweat stains, blood stains and oil stains from clothes. The following clothing materials are available: ① wool fabric ② cotton fabric ③ chemical fiber fabric ④ silk fabric. Which ones should not be washed with enzyme-added laundry detergent ( )

A.②③ B.③④ C.①② D.①④

[Various question] After a person is poisoned by accidentally taking heavy metal salts. In order to reduce toxicity. ( ) of the following substances can be taken

A. water b. salt water

C． Egg white D. soapy water

►Type 2: Prevent harmful chemicals and protect your health

Proposition perspective: Test students’ understanding of harmful chemicals

Example 2 Food safety is closely related to human health. Which of the following practices will not damage human health ( )

A. Soaking aquatic products in formaldehyde aqueous solution

B. Baking cakes with baking powder containing sodium bicarbonate

C． Pressing peanut oil from moldy peanuts

D． Preserved foods with industrial salt containing sodium nitrite

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For more information about "Chemistry and Health, Staying Away from Toxic Substances" PPT courseware, please click the Chemistry and Health PPT, Staying Away from Toxic Substances PPT tab.

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"Stay Away from Toxic Substances" Chemistry and Health PPT download, 22 pages in total. Learning Objectives 1. Know that heavy metal salts, formaldehyde, aflatoxin and other substances are harmful to human health. Understanding and mastering chemical knowledge can help the body resist harmful substances. 2. Understand through experimental exploration...

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File Info

Update Time: 2024-10-01

This template belongs to Chemistry courseware Lu Jiao Edition Ninth Grade Chemistry Volume 2 industry PPT template

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