6.2 Feeding relationships and cycles

• Biologie
• Middelbare school
• mavo, havo
• Leerjaar 2

start task 

6.2 Feeding relationships and cycles

1. Copy the learning goals below into your notebook
2. Join this LessonUp

Learning goals: after this lesson you can...

- describe the groups of organisms in the nutrient cycle.

- describe the water cycle and the carbon cycle.

planning

1. review bs1: organisms & their environments
2. video: water & carbon cycle
3. notes
4. (home)work

               Abiotic

                Biotic

Put the need organism in the correct order to make a food chain. Tip: start with the producer (the plant)

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questions about 6.1?

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6.2 overview

- Producers, consumers and reducers

- Nutrient, water and carbon cycles

- Waste

Learning goals: after this lesson you can...

- describe the groups of organisms in the nutrient cycle.

- describe the water cycle and the carbon cycle.

Photosynthesis

CO₂ + H₂O + 'sunlight / energy' --> C6H12O6 + O₂

_{Carbondioxide + water + sunlight --> glucose (sugar) + oxygen}

🌱 Food Chain

Producers: Plants – make food by photosynthesis.

Consumers: Animals – eat plants or other animals.

Primary consumers: eat plants

Secondary consumers: eat animals

Breakdown agents: bacteria and fungi – break down dead remains into nutrients in the soil.

breakdown agents

🌱 Food Chain

🔬 Breakdown agents (decomposers)

Breakdown agents: bacteria and fungi – break down dead remains into nutrients in the soil.

Producers

Primary Consumers (herbivores)

Secondary Consumers

Tertiary Consumers

Apex predator

D

e

c

o

m

p

o

s

e

r

s

Producer

Primary consumer

Secondary consumer

Tertiary consumer

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♻️ Cycles

Nutrient cycle

Substances move: 

plant → animal → breakdown agent → soil → plant.

Nutrient cycle

♻️ Cycles

Water cycle

Evaporation → Condensation → Precipitation → 

water returns to oceans/rivers.

Water cycle

♻️ Cycles

Carbon cycle

CO₂ in air → taken in by plants → used and released again by animals and breakdown agents.

Carbon cycle

pp 194

Carbon cycle

CO2 is used by producers for photosynthesis--> forms glucose

Glucose is then used to make more energy-rich substances

Energy-rich substances consumed by consumers and reducers

Carbon cycle

But everyone respires, releasing CO2 (what does respiration mean again?)

And every organism produces waste and dies...

Breaking down waste products releases CO2 

♻️ Biodegradable

Comes from plants or animals, can be broken down by breakdown agents.

🚯 Plastic soup

Plastic does not break down → ends up in the food chain → harmful for animals and humans.

Plastic soup

Plastic slowly breaks down into smaller particles

Eventually particles become microscopic (microplastics)

Accumulates in tissues

Explain in one sentence how plants, animals and breakdown agents together create a cycle of nutrients.

What	Do exercises 1-3 and 5-7 (pp 196-200)
How
Help	.
Done?	Check and correct (Classroom). Test yourself + flashcards BvJ online.

1. Book: Use the text and images from pages 192-196
2. Neighbour
3. Teacher

You may quietly work together with your neighbour.

Conversations should only be about the exercises.

- describe the groups of organisms in the nutrient cycle.

- describe the water cycle and the carbon cycle.

Carbon Cycle

Carbon in Carbondioxide (CO² in air) 

carbon in glucose

(producers)

Carbon in energy rich (organic) molecules

Carbon in energy rich (organic) molecules in animals (fats, carbohydrates, protein) 
(consumers)

Carbon in energy rich (organic) molecules

(reducers)

respiration

fotosynthesis

respiration

respiration

Air

Example rabbit

Example bread fungus

Example: oak tree