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