U2 B5 2HVTTO

B5 Food spoilage
  • Jacket in your locker
  • Put your things on your desk
       Laptop/Book
       Notebook, pencil case
  • Bag on the floor
  • Read pages 125-127
timer
5:00
Lessongoals
  • You can describe ways to prevent food spoilage
Homework U2 B5
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Slide 1: Tekstslide
BiologieMiddelbare schoolhavo, vwoLeerjaar 2

In deze les zitten 19 slides, met interactieve quizzen en tekstslides.

time-iconLesduur is: 45 min

Onderdelen in deze les

B5 Food spoilage
  • Jacket in your locker
  • Put your things on your desk
       Laptop/Book
       Notebook, pencil case
  • Bag on the floor
  • Read pages 125-127
timer
5:00
Lessongoals
  • You can describe ways to prevent food spoilage
Homework U2 B5

Slide 1 - Tekstslide

Secret Student
This lesson, I have randomly picked someone to be the secret student.

I pay special attention to:
  • Your use of English
  • Your participation in the lesson

At the end I will reveal the secret student, If I can give them positive feedback, they also earn 1/3 +0,5 OR +1 cm² cheat sheet.

Slide 2 - Tekstslide

Wheel of homework
Go to Lessonup.app and use this code
Reward
Penalty
Rewards
  • +1 cm2 cheatsheet = you get to make a cheatsheet for a test. This starts being 1 by 1 cm. Everytime you earn this it gets 1 cm bigger to a max of 4 by 4 cm.
  • 1/3 +0.5 = If you earn this 3 times you get to add 0,5 to one of your biology marks.
  • Snitch = You can pick a classmate who also is checked for homework, you earn two V's (having 3 earns you a 1/3 +0,5)
  • Too bad = You only get one V
penalties
  • 45 min extra worktime = you need to come after school and do homework, this will last for 45 min or until the task is done
  • Coloringpage = You get to pick a coloringpage, You need to color it and perform tasks that might be on it. You need to hand it in during the next lesson, If you don't you get 2 marks.
  • 2/1 marks = a mark is an X, if you get 3 of these you will automaticly earn the 45 min extra worktime.
  • Snitch = You can pick a classmate who also is checked for homework
  • Lucky! = You don't get a penalty

Slide 3 - Tekstslide

Clara is an adult woman.
She calculates her BMI.
How should she do that?
A
BMI=weight2length
B
BMI=lenght2weight
C
BMI=weightlength2
D
BMI=lengthweight2

Slide 4 - Quizvraag

Her BMI turns out to be 23,5.
What does this mean for her?
A
Her weight is too low
B
Her weight is healthy
C
Her weight is too high
D
Her weight is way too high

Slide 5 - Quizvraag

A certain foodstuff contains 20 kJ of energy.
How much J is that?
A
2.000 J
B
20.000 J
C
0,002 J
D
0,02 J

Slide 6 - Quizvraag

Meyra en Miray are identical twins.
The amount of energy they need is not the same.
What is the most logical reason for this difference?
A
Their sex is different
B
Their height is different
C
Their age is different
D
Their physical activity is different

Slide 7 - Quizvraag

Why does food spoil?

Slide 8 - Open vraag

What happens when you eat/drink spoiled food?

Slide 9 - Open vraag

Food spoilage
Bacteria and fungi eat our food = food spoilage
They need:
  • Food
  • Moisture
  • Right temperature
  • Right environment

Preserving food is done by changing these things: 
Making it impossible/hard to live on the food for bacteria/fungi

Slide 10 - Tekstslide

Preserving - Water
  • Drying
             Bacteria/fungi dry out

Slide 11 - Tekstslide

Preserving - Cooling
  • Fridge > 3 - 4 °C
            Bacteria/fungi are slowed
  • Deep freeze > -20 °C
            Bacteria/fungi are frozen

Slide 12 - Tekstslide

Preserving - heating
  • Pasteurization > 72 °C
           Most bacteria/fungi are killed
  • Sterilization >130 - 140 °C
            Bacteria/fungi are killed

Slide 13 - Tekstslide

Preserving - Additives
  • Preservatives 
           Sugar                   Acid
           Salt                       Sulphite
           Vinegar
  • Additives
            Colourings       Aromas
            Flavourings

Slide 14 - Tekstslide

Preserving - other ways
  • Irradiation
             Bacteria/fungi are killed with radioactive rays
  • Inert packing
             Adding a mixture of gases to the packaging helps the food stay fresh                 longer
  • Vacuum packing
            After pasteurization/sterilization/preservatives/inert packing
           Bacteria/fungi are unable to reach the food

Slide 15 - Tekstslide

What you should do: U2 B5
  • Pages 125-131
  • Asgmt  1-8, 4c
OR challenge
  • Asgmt 5-10

Done with the above?
  • Work on the next chapter(s)
  • Learn for the test 
  • Make other homework
  • Read a book
Zs = Working in Silence
  • No asking questions
  • Silent, don't disturb anyone
  • Stay at your  desk
timer
6:00

Slide 16 - Tekstslide

What you should do: U2 B5
  • Pages 125-131
  • Asgmt 1-8, 4c
OR challenge
  • Asgmt 5-10

Done with the above?
  • Work on the next chapter(s)
  • Learn for the test 
  • Make other homework
  • Read a book
Zw = Working with whispering
  • Teacher is available for questions
  • Only whisper with the student next to you
  • Stay at your  desk

Slide 17 - Tekstslide

Secret Student
The secret student was .......

I paid special attention to:
  • Your use of English
  • Your participation in the lesson

If I can give them positive feedback
they also earn 1/3 +0,5 OR +1 cm² cheat sheet.

Slide 18 - Tekstslide

Tidy Duty
3 people each lesson
  • Desks: empty and straight
  • Chairs:  underneath the desks OR end of day: on the desks
  • Floor: no rubbish

Slide 19 - Tekstslide