Required Practical 8: Plant Responses PAPER 2 Flashcards
In the required practical plant responses what do you investigate.
The effect of light or gravity on the growth of newly germinated seedlings.
When investigating the effect of light intensity on the height of seedlings, the independent variable is the …
light intensity.
When investigating the effect of light intensity on the height of seedlings, the dependent variable is the …
height of the seedlings
First, we place cotton wool in —— and then soak them with equal volumes of water.
three petri dishes
First, we place cotton wool in three petri dishes and then soak them with …
equal volumes of water.
The volume of water is a ——— variable.
control
Secondly, place ————— in each dish.
10 mustard seeds
The type of seeds is a —— variable.
control
Thirdly, we leave the dishes in a —– place and allow seeds to germinate.
warm
Thirdly, we leave the dishes in a warm place and allow seeds to …
germinate.
After a few days the seeds will …
germinate
Fourthly, make sure that the three dishes have the same amount of …
seedlings
The number of seedlings is a ——- variable.
control
Fifthly, remove excess seedlings so that …
all three dishes have the same amount of seedlings in each.
Sixthly, use a ruler and —-, holding the stems to make sure that they are straight.
measure the height of each seedling
Sixthly, use a ruler and measure the height of each seedling, holding the …
stems to make sure that they are straight.
Seventhly, place each of the three petri dishes in …
different conditions.
One of each dish is place in a area of …
full sunlight, partial light, complete darkness
Eighthly, measure the height of …
every seedling over 5 consecutive days.
Using this data draw a …
diagram displaying the effects of different light intensities.
Eighthly, measure the height of every seedling over 5 consecutive days. Using this calculate the …
mean height
the height of the seedlings is ——– for both full sunlight and partial light.
similiar
The seedlings in complete darkness are small and yellow because …
once the seedlings have used all their energy stores they cannot carry out photosynthesis in the dark.
The seedlings in complete darkness are ————- because once the seedlings have used all their energy stores they cannot carry out photosynthesis in the dark.
small and yellow
When investigating the effects of gravity on seedlings, …
put the dish is placed on its side in different conditions (full sunlight, partial and darkness)
