YR2-K4-LSN5

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

LESSON 5

TODAY'S LEARNING GOALS:

• I know the basics of what foods need to be prepared in what ways and why.
• I know various methods of food preservation and can name examples.
• I know what food additives are and why they are used.
• I understand what is on the labels on various foods in the supermarket.
• I know where my food comes from and how it is produced.

TODAY'S KEY WORDS:

• Preservatives
• Food coloring
• E-numbers 
• Drying
• Canning
• UHT
• Pasteurisation

kerboodle pages 53

LESSON 5

True or false?

1. E-numbers are additives that are produced in the European Union

2. E-numbers are always preservatives

3. You can preserve some foods by adding salt

4. You can preserve some foods by adding acid

5. Food can only 'go bad' if bacteria grown on it

6. In order to make milk last longer, it is heated to either 70 or 140 degrees Celsius

7. Food colourings, aromas and preservatives are all types of additives.

E-numbers are additives that are produced in the European Union

1. True
2. False

E-numbers are always preservatives

1. True
2. False

You can preserve some foods by adding salt

1. True
2. False

You can preserve some foods by adding acid

1. True
2. False

The only way that food can 'go bad' is if bacteria grow on it

1. True
2. False

In order to make milk last longer, it can be heated to 140 degrees Celsius

1. True
2. False

Food colorings, aromas and preservatives are all types of additives

1. True
2. False

Food additives (preparation)

• If you brought a photo of a food item: find this photo (you may use your phone if necessary)
• If you didn't bring a photo, search for two of your favourite packaged foods online. Search for "ingredient label [food] [brand]", so for example "ingredient label ontbijtkoek peijnenburg".

Food additives (part 1)

Some examples of additives:

1. MSG
   
2. Artificial food colouring
3.  Sodium Nitrate
4. Gear Gum
5. High Fructose corn syrup
6. Artificial sweeteners
7. Carrageenan
8. Sodium Benzoate
9. Transfat
10. Xantham gum
11. Artificial flavouring
12. Yeast extract

 - Write down:

1) What additives does it contain?

2) What do those additives do?

Food additives (part 2)

Some examples of additives:

1. MSG
   
2. Artificial food colouring
3.  Sodium Nitrate
4. Gear Gum
5. High Fructose corn syrup
6. Artificial sweeteners
7. Carrageenan
8. Sodium Benzoate
9. Transfat
10. Xantham gum
11. Artificial flavouring
12. Yeast extract

Discuss in groups of 2 or 3:

- Were there more or fewer additives than you expected?

- What additive was the most surprising or interesting?

PRACTICE QUIZ:

• go to Kwizl
  
• Join the class TV2I using the code FW8CMX
• do the practice quiz about lesson 1-5 (20 minutes)
  
• hand it in
• see if there is a quiz ready for you to grade and give feedback
• grade your classmates quiz (20 minutes)
• quiz for a grade (lesson 1-5): next week (counts 2x)
  

HW FOR LESSON 6

• Study for the quiz
• Complete the lessonup HW6
• Next week is also an opportunity to get feedback on the lab report or food diary (so prepare any questions you have)