Top Banner
Why does food go bad? And….. some interesting things about what we eat.
24

Why does food go bad? And….. some interesting things about what we eat.

Jan 19, 2016

Download

Documents

Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1: Why does food go bad? And….. some interesting things about what we eat.

•Why does food go bad?•And….. some interesting

things about what we eat.

Page 2: Why does food go bad? And….. some interesting things about what we eat.
Page 3: Why does food go bad? And….. some interesting things about what we eat.

What food do people eat in different countries? What healthy fast food is there?Why does food go bad?

?( may be there some interesting things you want to speak about)

Page 4: Why does food go bad? And….. some interesting things about what we eat.

to reach the aim of the lesson and receive good marks we should:

• Be attentive, emotional, active• Listen to classmates and the teacher• Ask and answer different questions• Participate in discussion.

Page 5: Why does food go bad? And….. some interesting things about what we eat.

Phonetic Drills

[í] [ė] [ə] [Ą] [ǽ]

[t]

[b]

Page 6: Why does food go bad? And….. some interesting things about what we eat.

Phonetics. Betty Botta bought some butter But she said “the butter’s bitter,

Page 7: Why does food go bad? And….. some interesting things about what we eat.
Page 8: Why does food go bad? And….. some interesting things about what we eat.

“to spoil -

– to change sth. good to bad, unpleasant, useless, etc. / to ruin sth.

Page 9: Why does food go bad? And….. some interesting things about what we eat.

Suiza

Música:Time to said goodbye(Sarah Brightman y Andrea Bocelli)

Suiza

Música:Time to said goodbye(Sarah Brightman y Andrea Bocelli)

Page 10: Why does food go bad? And….. some interesting things about what we eat.
Page 11: Why does food go bad? And….. some interesting things about what we eat.

Food and acidity• The acidity of food is important because it

affects the taste and the rate at which microorganisms grow in the food.

• 3 types of microorganisms

Page 12: Why does food go bad? And….. some interesting things about what we eat.

3 types of microorganisms

• Moulds• Yeasts• Bacteria

• We can prevent food poisoning by keeping dishes, surfaces and utensils clean, cool and dry

Page 13: Why does food go bad? And….. some interesting things about what we eat.

Escherichia coli

Scientific classification

Domain: Bacteria

Phylum: Proteobacteria

Class: Gammaproteobacteria

Order: Enterobacteriales

Family: Enterobacteriaceae

Genus: Escherichia

Species: E. coliBinomial nameEscherichia coli(Migula 1895)

Castellani and Chalmers 1919Synonyms

Bacillus coli communis Escherich 1885

Page 14: Why does food go bad? And….. some interesting things about what we eat.

Oxidation• A reaction between the natural

proteins(enzymes)in the fruit and the oxygen in the air.

• We can reduce this effect and stop food from turning brown by adding a natural acid, putting them in boiling water for 10 seconds to destroy the enzymes or by preserving them in a sugary solution such as syrup.

Page 15: Why does food go bad? And….. some interesting things about what we eat.

Ваше здоровье зависит от pH баланса

•Можете ли вы себе представить, что развитие многих болезней зависит от одной причины? Многие специалисты диетологи и фитотерапевты эту скрытую опасность теперь обозначают двумя словами: кислота и щелочь.•Высокая кислотность разрушает наиважнейшие системы в организме и он становится беззащитен перед болезнями. Сбалансированная pH-среда обеспечивает нормальное протекание метаболических процессов в организме, помогая ему бороться с заболеваниями. Здоровый организм имеет запас щелочных веществ, которые он использует в случае необходимости.•Что такое pH?•Соотношение кислоты и щелочи в каком-либо растворе называется кислотно-щелочным равновесием (КЩР), хотя физиологи считают, что более правильно называть это соотношение кислотно-щелочным состоянием. КЩР характеризуется специальным показателем pH (power Hidrogen – "сила водорода”), который показывает число водородных атомов в данном растворе. При pH равном 7,0 говорят о нейтральной среде. Чм ниже уровень pH – тем среда более кислая (от 6,9 до 0). Щелочная среда имеет высокий уровень pH (от 7,1 до 14,0).•Тело человека на 70% состоит из воды, поэтому вода – это одна из наиболее важных его составляющих. Тело человека имеет определенное кислотно-щелочное соотношение, характеризуемое pH (водородным) показателем. Значение показателя pH зависит от соотношения между положительно заряженными ионами (формирующими кислую среду) и отрицательно заряженными ионами (формирующими щелочную среду). Организм человека постоянно стремится уравновесить это соотношение, поддерживая строго определенный уровень pH. При нарушенном балансе могут возникать множество серьезных заболеваний.

Page 16: Why does food go bad? And….. some interesting things about what we eat.

• pH – a measurement of the level of acid or alkali in a substance. In the pH range of 0-14

a reading of below 7 shows an acid and of above 7 shows an alkali.

Page 17: Why does food go bad? And….. some interesting things about what we eat.

Temperature

•UHT [UHT] [ˌjuː eɪtʃ ˈtiː] [ˌjuː eɪtʃ ˈtiː] abbreviation (BrE)•* * *•abbrev•1. Ultra-heat-treated•2. Ultra-high temperature•

From Useful English dictionary. 2012.

Page 18: Why does food go bad? And….. some interesting things about what we eat.

Rate: paceSpoil: rotColonies: groupsMoisture: waterUtensils: toolsReaction: a process between different substances Enzymes: proteins(a substance found in food such as meat, fish, and eggs. It’s important for helping people and animals grow and be healthy)Preserving: conservingDormant: not active

Page 19: Why does food go bad? And….. some interesting things about what we eat.

Give the definition• colony,• moisture, • utensils, • enzymes, • preserve, • dormant,• acid• alkali• substance

Page 20: Why does food go bad? And….. some interesting things about what we eat.

Let’s check• A group of the same type of animals, insects or plants living or

growing in the same place.• Water in small drops on a surface, in the air, etc.• A type of tool that is used in the home.• A substance, produced by all living, that helps a chemical

change happen or happen more quickly, without being changed itself.

• To keep sth. safe or in good condition• Not active for some time.• (in chemistry)a liquid substance that can dissolve metal and

may burn your skin or clothes.• A chemical substance that can burn skin when it is dissolved

in water.• A solid or liquid material.

Page 21: Why does food go bad? And….. some interesting things about what we eat.

• Results: we can avoid getting food Poisoning!

Page 22: Why does food go bad? And….. some interesting things about what we eat.

Our Projects

have got acquainted with… have found out…..

Due to my classmates’ projects I

have remembered…… learnt……

Page 23: Why does food go bad? And….. some interesting things about what we eat.

Find out more about …….

•  www.HealthFitnessSite.com

Page 24: Why does food go bad? And….. some interesting things about what we eat.

Reflexion

• What have you learnt today?• What was interesting to discover?• What was difficult?• What activity did you enjoy most?• What skills would you like to develop and improve?