YR1_T2_LSN6

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

iubioub

Materials

• Computer (Lessonup)
• Textbook
• Notebook
• Pencil case

I am ready for this lesson:

• I am in the correct seat.
• My jacket is in my locker.
• My telephone is at home or in my locker.
• I have all my materials ready as required by the checklist.
• I do not have any food / drinks and/or chewing gum.

Are we ready?

😒🙁😐🙂😃

iubioub

Welcome THV1A!

§2.4 - Combustion in the body

iubioub

During this lesson I will .......

• ... be quiet during classroom instructions.
• ... raise my hand when I have a question.
• ... listen when others are speaking.
• ... be an active and involved participant.
• ... only touch/use my own materials.

iubioub

A WARNING

DIFFERENT SEAT

TIME OUT: 5 MIN MAX CORRIDOR

REMOVAL TO 022

iubioub

PLAN FOR TODAY:

1.

2.

3.

4.

15 min: recap 2.1, 2.2, 2.3

• What was it about?
• Short recap

40 min: topic 2.4

• Learning goals
• Key words
• Notes

20 min: HW time

• Make exercises
• Study glossary of T2.4
• Read T2.5

15 min: HW help + time

• Discuss a question
• Continue with hw

What did we discuss in previous lessons?

Energy pyramid

The energy pyramid shows that you 

lose energy with every step in the food chain. 

This is because:

Consumers don’t eat the entire organism

Organisms use up some of the energy 

Organisms produce waste that has some energy. 

PRODUCERS

CONSUMER

FOODWEB

FOODCHAIN

Shows one possible path of energy flow

Organism that feeds on other organisms

Shows all feeding relationships in an area

Organism that uses photosynthesis

Food chains and food webs

Food chain

Food web

GROWTH & REPAIR

ENERGY

STAYING HEALTHY

PROTEINS

CARBOHYDRATES

FATS

MINERALS

WATER

FIBRE

VITAMINS

Indicators

Indicators show (indicate) if a certain substance is present or not

Digestion (4 steps!)

Ingestion:    Putting food in your mouth

Digestion:    The process of breaking down large molecules into smaller ones

Absorbtion:   

Egestion:  The process of removing waste products

rectum

liver

mouth

stomach

oesophagus

large intestine

small intestine

iubioub

§2.4

Combustion in the Body

Combustion

Aerobic respiration

Anaerobic respiration

Oxygen debt

Fermentation

TB P.76-81

iubioub

§2.4 - 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

TB P.76-77

iubioub

§2.4 - Keywords

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

TB P.76-77

iubioub

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.

TB P.76-77

What is energy not used for?

1. Building new cells
2. Movement
3. Heat
4. none of the answers.

How much energy is passed onto each trophic level in a foodweb?

1. 5%
2. 10%
3. 50%
4. 90%

What is not a nutrient you need for energy?

1. carbohydrates
2. proteins
3. lipids (fats)
4. sugars

What is the most correct explanation of the key word respiration?

1. breathing
2. the absorption of energy from cells
3. the release of energy in cells
4. combustion

iubioub

Aerobic respiration

Aerobic respiration is combustion with oxygen 

The formula is:

glucose + oxygen → carbon dioxide + water + energy 

Do you know the chemical formulas for these substances?

TB P.76-77

iubioub

Aerobic respiration

Aerobic respiration is combustion with oxygen 

TB P.76-77

iubioub

Anaerobic respiration

Anaerobic respiration is combustion without oxygen in our muscles

The formula is:

glucose → lactic acid + energy 

Do you know the chemical formulas for these substances?

TB P.76-77

iubioub

Anaerobic respiration

Anaerobic respiration is combustion without oxygen in our muscles

TB P.76-77

iubioub

Anaerobic respiration

Anaerobic respiration has disadvantages:

• It gives you far less energy.
• It creates lactic acid , which can cause cramps.
• It creates an oxygen debt.

After exercising you will still breathe hard (panting), this extra oxygen is needed to break down the lactic acid built up in your muscles. This is called oxygen debt

TB P.76-77

Which type of respiration releases more energy?

1. aerobic
2. anaerobic

Which type of respiration creates lactic acid?

1. aerobic
2. anaerobic

Which type of respiration is far more efficient?

1. aerobic
2. anaerobic

Where does the glucose being used come from?

1. proteins
2. fats
3. vitamins
4. carbohydrates

iubioub

Fermentation

Fermentation is anaerobic respiration that takes place in 

plants, fungi & 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.

TB P.76-77

iubioub

Fermentation

Fermentation is anaerobic respiration that takes place in 

plants, fungi & bacteria.

 

TB P.76-77

iubioub

HW Time

• Review your notes.
• Study the glossary.
• Do the exercises. 

TB P.76-81

On magister:

• Make the exercises of §2.4 in your textbook
• Study the glossary of §2.4
• Read and highlight §2.5

Which homework exercise would you like to do together?

36

38

40

42

iubioub

HW Time

• Review your notes.
• Study the glossary.
• Do the exercises. 

TB P.76-81

On magister:

• Make the exercises of §2.4 in your textbook
• Study the glossary of §2.4
• Read and highlight §2.5