6.3 Everything is reused 2HVTTO

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

6.3 Everything is reused

• Jacket in your locker

• Put your things on your desk

       Laptop/Book

       Notebook, pencil case

• Bag on the floor

• Pages 159-160 

5

minute

00

second

add30s

Lessongoals

• Remembering – I can write the word equations for photosynthesis and respiration correctly.

• Understanding – I can explain how photosynthesis and respiration are connected.

• Understanding – I can describe the role of producers, consumers and reducers in the carbon cycle.

• Analysing – I can trace carbon through at least four steps of the carbon cycle.

Homework 6.3

What is the correct order in a food chain?

1

Producer

2

Secondary consumer

3

Primary consumer

4

Tertiary consumer

Types of factors

In an ecosystem an organism has lots of different factors that influence them:

The purity of the water is an abiotic factor

The number of predators is a biotic factor

The amount of faeces is a biotic factor

The hours of sunlight is an abiotic factor

The amount of availably food is a biotic factor

The quality of the soil is an abiotic factor

The competition over food is a biotic factor

an abiotic factor

a biotic factor

a biotic factor

an abiotic factor

a biotic factor

an abiotic factor

a biotic factor

an abiotic factor

an abiotic factor

a biotic factor

Complete the food chain

The image probably shows a pyramid of ......

A

Biomass

B

Numbers

In food chains/webs energy is passed on to the next trophic level.

Sadly only a small bit of energy actually becomes part of these organisms.

Why is all the other energy lost?

Cycle of nutrients

reducers/ decomposers

Scavengers don't eat living organisms!

They eat the dead remains and faeces of these organisms

!

Scavengers don't eat living organisms!

They eat the dead remains and faeces of these organisms

!

Scavengers don't eat living organisms!

They eat the dead remains and faeces of these organisms

!

Reducers don't eat living organisms!

They eat the dead remains and faeces of these organisms

!

Reducers reduce substances to very basic nutrients, these nutrients end up in the soil. Allowing plants to use them when their roots absorb them.

!

Showing reactions formulas with actual amounts

During photosynthesis plants make glucose; its formula isC₆H₁₂O₆

The complete reaction is:

CO₂ (carbon dioxide) + H₂O (water) + sunlight -> C₆H₁₂O₆ (glucose) + O₂(oxygen)

Molecules are made out of atoms like C, O and H.

During photosynthesis and all other chemical reactions!

All of these atoms are rearranged; no new ones are added.

If we correctly want to show this, we put numbers in front of the molecules.

The amount on both sides of the arrow for each atom should be the same.

It becomes: sunlight +6 H₂O + 6 CO₂ -> 6 O₂ +1 C₆H₁₂O₆

C₆H₁₂O₆

CO₂

H₂O

C₆H₁₂O₆

O₂

6

6

6

1

1

1

6

3

3

3

1

3

Carbon cycle

REDUCERS & SCAVENGERS

carbon in fossil fuels

combustion

combustion

What you should do: 6.3

• TB: Pages 159-160

• WB: Asgmt 26-36

• Lt: Asgmt 1-11

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

6

minute

00

second

add30s

What you should do: 6.3

• TB: Pages 159-160

• WB: Asgmt 26-36

• Lt: Asgmt 1-11

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