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WorksheetsScience Year 4
Total questions: 20
Worksheet time: 14mins
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
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.
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
Part of plants that give response towards light
(a)
What is an example of a stimulus for plants?
Touch
Light
Gravity
Water
all of the above
_____________is a plant with unusual leaves that close when a stimulus, such as a fly, brushes against hairs on the leaf.
Poinsettia
Rose
Venus flytrap
Carnation
stimuli is
the cause
the effect
response is
the cause
the effect
The roots of a plant grow down because of what stimuli?
Gravity
Light
Temperature
All of the above
Stems grow away from _______.
The sun
Gravity
Light
Temperature
How do stems respond to light?
It grows away from the light
It grows towards the trees
It grows towards the roots
It grows towards the light
