Photosynthesis and respiration

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

Welcome!

Today:

Discussing homework (WB p. 15)

Photosynthesis and respiration (TB p. 23)

Making homework

What are we going to learn today?

Today we're going to learn: 

What photosynthesis is. 

Why photosynthesis is so important.

What respiration is. 

How photosynthesis and respiration connect to each other.

How do plants make food?

Plants can convert the energy of the sun into energy they can use on their own: nutrition in the form of glucose.

Glucose is a sugar which has a lot of energy stored in it. 

This process is called photosynthesis. 

Photosynthesis takes place in the chloroplasts. 

How does photosynthesis take place?

A plant can't do photosynthesis on it's own. It needs certain substances to let it take place. It need water which it gets out of the ground through the roots. It also needs carbondioxide, which is a gas. It absorbs the carbondioxide through the leaves. Of course it also needs sunlight. 

What does a plant make with photosynthesis

When a plant has all those substances it can perform photosynthesis. During that, a plant makes glucose and oxygen. It stores glucose in differents parts of the plant, and it releases oxygen through the leaves. 

Stomata

Amazone: The lungs of the earth

Respiration

Glucose is fuel for all living beings. This respirates in the mitochondria.

Which type of cells do you think have a lot of mitochondria? 

Respiration

For someone to respirate, it needs glucose and oxygen. Glucose is often eaten and oxygen is breathe in. 

Respiration releases a lot of energy, but also some waste products. Those waste product are water and carbondioxide, which you both breathe out.

Relationship between photosynthesis and respiration?

Homework for next week

The exercises of paragraph 1.6 are homework for next week, you can find them on page 20.

What is not released during photosynthesis?

1. Zuurstof
2. Glucose
3. Koolstofdioxide

A plant needs oxygen for photosynthesis.

1. True
2. Untrue

Name 2 reasons why it is so importantl there are enough trees on the earth?

Where does photosynthesis take place?

Where does respiration take place?

What is not needed during respiration?

1. Water
2. Glucose
3. Oxygen

Where does all the energy we release indirectly come from?