Pollination-Lesson Slides

Year 5 Lesson 3

Pollination

Warm-Up Can you label the different parts of a ower?

3

1

4

2

5

6

Filament

Anther Stigma

Ovary Petals

Style

Warm-Up Male and Female Parts of a Flower Male parts — the ‘stamen’: Anther

1

Filament

2

The male part of the flower is called the stamen and produces pollen.

It is made up of the filament and the anther.

Female parts — the ‘carpel’: 3

6 Petals

Stigma

4

Style

5

Ovary

The female part of the flower is called the carpel and is where seeds are made. It is made up of the ovary, the stigma and the style.

Warm-Up Male and Female Parts of a Flower Male parts — the ‘stamen’: Anther: part of the stamen where pollen is produced Filament: supports the anther

Petals: Brightly coloured outer parts of the plant which surround the reproductive organs of a flower.

Female parts — the ‘carpel’: Stigma: sticky stem to collect pollen Style: long, slender stalk that connects the stigma and the ovary Ovary: Contains ovules, which develop into seeds upon fertilisation

Mini-lesson

What do you think is happening here?

Mini-lesson Pollination

Tiny grains of pollen brush of the anthers onto its body.

An insect is attracted to the bright coloured petals of a ower and lands on it to drink the nectar.

Why is it important for the pollen of one plant to be carried to another?

When the insect visits another ower, the pollen transfers to its sticky stigma.

Fertilisation

Mini-lesson The pollen travels down the style to the ovary at the base of the ower.

The ovules in the ovary then become seeds.

This process is called fertilisation.

Pollen of one plant must be carried to another plant. This is because most plants cannot be pollinated by their own pollen.

This is called

cross pollination.

Keywords Complete the keyword activity in your Student Handout: Stamen

Nectar

Carpel Pollination

Petals

Fertilisation

Let’s Discuss 1. What needs to be transferred between plants in order for pollination to take place? a. Seeds b. Water c. Pollen

Let’s Discuss 1. What needs to be transferred between plants in order for pollination to take place? c. Pollen

2. With a partner, discuss how a owering plant attracts insects.

Let’s Build!

Create a system to represent the movement of an insect between owers 1

2

Key Press

DC Motor

Wheel

Sketch and cut out your own pollinating insect!

Challenge 1 Create a system to simulate the way in which a owering plant attracts insects

RGB LED

Cycle Colours Interval Explore different Interval settings !

Checks for Understanding 1. Which block is being used to represent the movement of the insect? a. DC Motor b. RGB LED c. Interval

2. What is the transfer of pollen between owers called? a. Nectar b. Cross pollination c. Fertilisation

Checks for Understanding 1. Which block is being used to represent the movement of the insect? a. DC Motor

2. What is the transfer of pollen between owers called? b. Cross pollination

Debug It!

How can we keep the system on?

How can we keep the system on?

Toggle

Debug It!

The Toggle acts like a switch and will keep the system on once it is activated!

Challenge 2 Create a system to represent the process of pollination Number: ‘100’

1

Number: ‘0’

Light Sensor

Inverse

Additional RGB LED

Compare: ‘≤ 10’

Challenge 2 Create a system to represent the process of pollination 2

RGB LEDs: One in each ower

Light Sensor: Insert in front of second ower

Challenge 2 Create a system to represent the process of pollination 3

How do you know the second ower has been pollinated?

Checks for Understanding 1. What is the purpose of the Inverse block in the system? a. To make the second RGB LED turn on when the Light Sensor is covered. b. To make the second RGB LED turn off when the Light Sensor is covered. c. To turn the Light Sensor on and off.

2. How do bees help to pollinate owers? a. By eating the pollen. b. Pollen sticks to their bodies so they carry it between owers. c. By drinking pollen and making honey.

Checks for Understanding 1. What is the purpose of the Inverse block? a. To make the second RGB LED turn on when the Light Sensor is covered.

2.

How do bees help to pollinate owers? b.

Pollen sticks to their bodies so they carry it between owers.

Chilli Challenges

Experiment with altering the speed with which the ‘bee’ travels. Can you alter the settings of the DC Motor to better represent how a bee flies?

Experiment with the Sound Player block. Can you use sound to further represent the behaviour of a bee?

Experiment with a third flower. Can you represent a bee travelling to two flowers?

Exit Ticket What have you learned today?

Can you annotate your system?

Exit Ticket Now let’s apply what you know!

Can you research how plants produce fruit?