6.3 To eat or be eaten

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2,3

6.3 To eat or be eaten

Homework: Complete the assignments from 6.3

Next lesson homework check!

Today

• Check your knowledge
  
• Repeat information photosynthesis
• Explanation food relations
  
• Practicing food web and food chain
  
• Work independently
  

Answer te questions!

Sunlight is a(n)... factor

1. biotic
2. abiotic

Reproduction of a ladybug

1. BIOTIC
2. ABIOTIC

Small to big

1. Ecosystem - individual - community - population
2. Individual - community - population - ecosystem
3. Individual - population - community - ecosystem
4. Ecosystem - community - population - individual

Learning oblectives

You will learn how species are dependent on each other for food.

You will learn why there are more organisms of one species than the other.

Plants

Make their own food using photosynthesis

It uses: carbon dioxide + water

Energy source: sunlight

Products: glucose + oxygen

Photosynthesis

Sunlight

Carbon dioxide

Glucose

Oxygen

Water

Herbivore

Omnivore

Carnivore

Food chain

Food web

Food chain and food web

Food chain: Row of organisms that eat each other, with arrows between the organisms. 

Food web: Number of interconnected food chains.

Great tits and treecreepers are competitors.
They eat the same food: insects.

How do they each get enough food?

1. They don't live in the same tree.
2. They search different parts of the tree for insects.
3. They look for insects at a different time.
4. They live in different biotopes.

Producers, consumers and degradants

Producers: Green plants, the makers of glucose (by photosynthesis) and other nutrients in the food cycle.

Consumer: Animals and humans, the users of glucose and nutrients produced by plants.

Decomposers: Fungi and bacteria that break down natural waste so that minerals in the soil are available again for the producers.

Food pyramid

Pyramid of numbers = Numbers of organisms in a food chain. 

Each link in the chain is a staircase in the pyramid.

Pyramid of biomass

Let's get to work!

Check the assignments of 6.1 and 6.2.

Complete the assignments of 6.3: 3-6, 8-10, 12-14, 16-18

You may consult with your neighbour in a whisper. Raise your hand if you need any help. 

Tip: The LessonUp contains excersises and videos for extra practice, but also exercises for more challenge.

A food web can start with fungi.

1. True
2. False

This figure presents..

1. a foodweb
2. a food chain
3. producers
4. a food necklace

How is energy/food leaving the foodpyramid?

1. Combustion
2. One tree contains multiple caterpilars
3. Indigestible substances

Too easy?

Try some dutch exam questions!

https://biologiepagina.nl/ExamenHAVO/Ecologie/examenecologie1.htm

Learning oblectives

You will learn how species are dependent on each other for food.

You will learn why there are more organisms of one species than the other.