Required Practical Plants

Question 1

Effect of light intensity independent variable

Answer 1

Light intensity

Question 2

Effect of light dependent variable

Answer 2

Height of seedlings

Question 3

Step by step practical light

Answer 3

Cotton wool in Petri dish
Soak equal water- C
Put 10 mustard seeds in - C
Leave in warm place
Check same number of seedlings - C
Use ruler to measure height
Hold stem straight - C
Place in different conditions - full sunlight, partially light, darkness
Measure every day for 5 days
Calculate mean

Question 4

Seedlings in dark required practical results explained

Answer 4

Tall to reach light

Leaves are small and yellow - no photosynthesis

Question 5

Results geotropism practical

Answer 5

Shoots against gravity and roots towards gravity

Question 6

Why is damp blotting paper used

Answer 6

Prevent water affecting direction of root growth

Question 7

How does phototropism help plants survive

Answer 7

Receives more sunlight more photosynthesis more glucose made