YR1_T2_LSN4

• Science
• Middelbare school
• havo, vwo
• Leerjaar 1

HAVE READY

• YOUR TEXTBOOK
• YOUR NOTEBOOK
• A PEN/MARKER
• YOUR COMPUTER (JOIN THIS LESSONUP) 

HW CHECK

CHECK YOUR HW AND SHOW YOUR WORK

Which question should be discussed?

TOPIC 2: Being in the world 

In this topic you will learn about food chains, molecules in food, the digestive system, combustion inside and outside the body.

p. 45-89

TOPIC 2.4: COMBUSTION IN THE BODY

Knowledge:

• I know the difference between aerobic and anaerobic respiration 
• I know what fermentation is and can give examples of fermentation in different foods

Language:

• I can explain the advantages and disadvantages of bith types of respiration.

Skills:

• I know the chemical formula of both aerobic and anaerobic respiration 
• I know the chemical formula for fermentation

p. 76-81

TOPIC 2.4: COMBUSTION IN THE BODY

• Combustion
• Aerobic respiration
• Anaerobic respiration
• Oxygen debt
• Fermentation

p.76-81

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
• combustion inside the body is respiration!
•  
  

p.76-81

AEROBIC RESPIRATION

• Aerobic respiration is combustion with oxygen 
• The formula is:

glucose + oxygen → carbon dioxide + water + energy

• Do you remember the chemical formulas for these substances?
  

p.76-81

FORMULA

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

• Do you remember the chemical formulas for these substances?   

p.76-81

FORMULA

ANAEROBIC RESPIRATION

This type of 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

  

p.76-81

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.

p.76-81

FORMULA

TOPIC 2.4: COMBUSTION IN THE BODY

Knowledge:

• I know the difference between aerobic and anaerobic respiration 
• I know what fermentation is and can give examples of fermentation in different foods

Language:

• I can explain the advantages and disadvantages of bith types of respiration.

Skills:

• I know the chemical formula of both aerobic and anaerobic respiration 
• I know the chemical formula for fermentation

p. 76-81