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YR1_T2_LSN8
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Science
Middelbare school
havo, vwo
Leerjaar 1
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Slide 1 - Diapositive
Topic 2 Lesson 8
Slide 2 - Diapositive
Plan for today
Planning upcoming lessons
Explanation T2.4 Combustion in the body
Work on homework
Slide 3 - Diapositive
Planning upcoming lessons
Next week: Theory 2.5
Week after: Recap Topic 2 + Glossary test
Week after that week: Test Topic 2
Slide 4 - Diapositive
T2.4 Combustion in the body
Slide 5 - Diapositive
Learning goals
I know the difference between aerobic and anaerobic respiration
I know the chemical formula of both aerobic and anaerobic respiration
I know the disadvantages of anaerobic respiration
I know what fermentation is and can give examples of fermentation in different foods
I know the chemical formula for fermentation
Slide 6 - Diapositive
Key words
Combustion
Aerobic respiration
Anaerobic respiration
Oxygen debt
Fermentation
Slide 7 - Diapositive
Energy
Energy is needed for survival and is used for:
Building new cells
Movement
Heat
Food webs
show sources of energy for different organisms
Digestion
breaks down the food into smaller molecules
Respiration
is the process of getting the energy from these molecules
Combustion
is the process of burning something
Slide 8 - Diapositive
Slide 9 - Vidéo
Aerobic respiration
Aerobic respiration
is combustion with oxygen
The formula is:
glucose + oxygen → carbon dioxide + water + energy
Formulas?
Slide 10 - Diapositive
Aerobic respiration
Aerobic respiration
is combustion with oxygen
The formula is:
glucose + oxygen → carbon dioxide + water + energy
Does the formula looks familiar? It is the opposite of photosynthesis!
Slide 11 - Diapositive
Anaerobic respiration
Anaerobic
respiration
takes place when your cells don’t have enough oxygen, for example, when you exercise very hard.
The formula is:
glucose → lactic acid + energy
Slide 12 - Diapositive
Anaerobic respiration
Anaerobic respiration has disadvantages:
Gives you way less energy
The lactic acid causes cramps
You will still breathe hard after exercising, this extra oxygen is needed to break down the lactic acid. This is called
oxygen debt
Slide 13 - Diapositive
Slide 14 - Vidéo
Fermentation
Fermentation
is anaerobic respiration that takes place in plants, fungi or bacteria
The formula is:
glucose → alcohol + carbon dioxide + energy
This type of respiration is used to make beer
and wine, but also foods like bread, yogurt
and sauerkraut.
Slide 15 - Diapositive
Homework
Make question 33-42 in your textbook (pages 78-81)
Slide 16 - Diapositive
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