Amali Book – Pg 4-6

Aim : To show the presence of xylem as a continous tube system to transport  water

Observations

Cross section of a balsam root

Cross section of a balsam stem

Discussion

1.       Xylem tissue

2.       Yes

3.       The vascular tissues in the stem are arranged in a circle with the phloem tissue located in the outer layer.  In the root, the xylem tissues are found in the centre and are shaped like a star whereas the phloem tissues are between the radii of the xylem.

4.       A long tube filled with coloured water. This tube is the xylem tissue as it forms a continuos tube system to transport water.

Conclusion

The xylem tissues form a continous tube system from the root to the stem and leaves in transporting water in a plant.

Amali Book – Pg 2-3

Aim	To correlate different sizes of cubes with total surface area/volume (TSA/V) ratio.
Hypothesis	The smaller the size of cube, the larger the TSA/V ratio; the higher the percentage of coloured area.
Variables	MV : Size of cubes RV : The percentage of coloured area FV : Temperature, time taken, type of potato

Side (cm)	T Surface area (cm2)	Volume (cm3)	TSA/V	Estimated Percentage of coloured area  (%)
2	24	8	3	60
3	54	27	2	40
4	96	64	1.5	30

Answer to Question

1.       A big object has a low TSA/V ratio in which the movement of solutes through diffusion is less.  The hypothesis is accepted.