Photosynthesis

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

Welcome!

Introduction new chapter (combustion and breathing, page page 8)

Explaining/repeating about photosynthesis

Making exercises 

Why do humans need energy?

Where do we get that energy from?

What are we going to learn today?

Today we will learn:

How plants transfer energy from the sun. 

Why this is important for all life on earth. 

The sun

The sun is the most important source of energy for all life on earth.

Radiation reaches the earth --> plants convert that energy to food --> plants get eaten 

Vacation pic (night sky in the Grand Canyon)

How can plants get food?

Plants convert energy from the sun into a substance they can use as food: food in the form of glucose. 

Glucose is a sugar that contains a lot of energy. 

This process is called photosynthesis. 

Photosynthesis is an example of metabolism. 

How does photosynthesis take place?

A plant can't do photosynthesis on its 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. 

Amazone forest: 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? 

Homework for next lesson:

Make the exercises for of paragraph 1.1 in your notebook. You don't need to make exercise 4. Please bring a notebook next lesson if you haven't already done so. 

What isn't released during photosynthesis?

1. Zuurstof
2. Glucose
3. Koolstofdioxide

A plant needs oxygen for photosynthesis.

1. True
2. False

Why is it important that there are so many plants on the earth? Multiple answers correct.