Science Year 4

what type of tropism is occurring here?

• phototropism

• thigmotropism

• gravitropism

• tropictropism

what type of tropism is occurring here?

• phototropism

• thigmotropism

• geotropism

• tropictropism

Tropisms is. . .

• a directional response of plants to stimuli

• Moment of plant towards light

• Response of roots with water

• Response to gravity

When plants move in response to LIGHT, it is called:

• Gravitropism 
• Phototropism
• Hydrotropism 
• Thigmotropism 

What is stimuli?

• changes in an organism’s environment that cause a response.

• plant’s response to the number of hours of darkness in its environment.

• substances that act as chemical messengers within plants.

• growth toward a stimulus.

What is an example of a stimulus for plants?

• Touch

• Gravity

• Light

• all of the above

Based on the video we watched, which stimulus are the plants responding to?

• gravity

• light

• heat

• cold

How do plants respond to gravity?

• The roots and stem both

  grow downward.

• The roots and stem both

  grow upward.

• The roots grow downward and

  the stem grows upward.

• The roots grow upward and the

  stem grows downward.

Tags

NGSS.MS-LS1-5

NGSS.MS-PS2-4

Diagram 1 shows a piece of plywood covering a patch of grass.

After a few days, it is found that the grass underneath the piece of plywood has turned yellowish because...

• the grass has not received air

• the grass has not received water

• the grass has not received sunlight

• the grass has not been given fertilisers

What is the main function of the roots

• To store water and food

• To provide support and keep it stable

• To absorb water and minerals in the soil

• To stop soil erosion