Parts of Plants and Tropism

PLANT RESPONSES TO STIMULI

SCIENCE YEAR 4

By: Puan Khairul Bariah

4.1.1 State that plants respond to stimuli through observation using various media

LET'S WATCH A VIDEO

https://www.youtube.com/watch?v=iRpvidn0_1M

Multiple Select

From the video, plants respond to stimuli such as...

• water

• sunlight

• gravitational pull

• touch

4.1.2 Relate parts of plants that respond to different types of stimuli.

PARTS OF PLANTS THAT RESPOND TO DIFFERENTS TYPES OF STIMULI

Roots respond and grow towards water.

Roots grow downwards towards gravitational pull.

PARTS OF PLANTS THAT RESPOND TO DIFFERENTS TYPES OF STIMULI

Shoots respond and grow towards light

PARTS OF PLANTS THAT RESPOND TO DIFFERENTS TYPES OF STIMULI

Leaves of some plants respond to touch

Multiple Select

Parts of plants that respond towards stimuli are

• Shoots

• Roots

• Leaves

• Fruits

Multiple Select

Roots of plants respond towards

• light

• water

• touch

• gravitational pull

Multiple Select

What is gravitational pull?

• Its is a force that pulls object towards Earth

• Its is a force that pushes object away from Earth

• It is a force that make objects remain in their position

Multiple Select

Shoots of plants respond towards

• light

• water

• touch

• gravitational pull

LET'S WATCH SOME VIDEOS

• https://www.youtube.com/watch?v=XTi6eDeKkQI

• https://www.youtube.com/watch?v=O7eQKSf0LmY

Multiple Select

Leaves of some plants respond to

• light

• water

• touch

• gravitational pull

Multiple Select

Some plants will droop and fold their leaves inward when touch.

• Mimosa pudica

• Hibiscus

• Rose plant

• Venus flytrap

4.1.3 Conclude that parts of plants respond to stimuli by carrying out investigations

LET'S WATCH SOME VIDEOS

• https://www.youtube.com/watch?v=HmHvWDeTt7Y

• https://www.youtube.com/watch?v=mYZXax8V_L0&t=1s

• https://www.youtube.com/watch?v=Rb55mj8xkxk

• https://www.youtube.com/watch?v=DhITXtENPrU

Multiple Choice

What is your OBSERVATION from this diagram?

• The shoots grow towards the hole

• The shoots grow towards the light

Multiple Choice

Give INFERENCE based on your OBSERVATION from this diagram?

• The shoots respond towards the hole

• The shoots respond towards the light

Multiple Choice

What is your OBSERVATION from this diagram?

• The roots grow downwards

• The roots respond and grow towards gravitational pull

Multiple Choice

Give INFERENCE based on your OBSERVATION from this diagram?

• The roots respond and grow towards gravitational pull

• The roots grow downwards

Multiple Select

What can you conclude about the relationship between each part of the plant and its stimuli?

• Shoots respond towards light

• Roots respond towards water

• Roots respond towards gravitational pull

• Leaves of some plants respond to touch