Transporting food colouring through celary

Aim: To observe xylem tissue and prove that they transport water up the pant.

Equipment: Celery, Food colouring, Retort Stand and Petri dish.

Method: 1. Make a cut across the base of the celery stalk to expose a new section of the stem.
              2. Fill the petri dish with water and add a few drops of food colouring.
              3. Place the celery stalk in the petri dish and gently clamp it in place using the retort stand,                          boss head and clamp.
              4. Leave the stalk undisturbed for 24 hours.
              5. Remove the stalk from the clamp and petri dish. Cut the stem about 1/3 of the way up the                        stem.

Results: Dray a diagram of the cross-section through your stem. label the xylem tissue.

Reflection through glass

Aim: To investigate how different types of lenses refract light.


Equipment: single ray slit, power supply, a concave and a concave lens.


Method:

1. Set up a ray box, single slit ray slide and power supply.

2. place the convex lens in the space below. Place the ray box at the top of the page and shine the three rays of light at the lens. Make sure the central light ray hits the lens at 90* as indicated in the diagram.

3. Carefully trace the direction of the incoming and refracted rays.

4. Repeat using the concave lens.

Refraction

Aim:
To investigate how light is affected by changing the substance it is traveling through

Method:
Collect the equipment from your teacher, and set them up to produce a single beam of light.

Equipment:
Ray Box, power source, glass of perspex block, single-slit ray slide.

Using light reflection

Aim
To investergate the reflections of light rays in concave and convex mirrors.

Equipment
Ray box, Tripple-slit ray slide, concave and convex mirrors, power supply.

Method
1) Set up your ray box, tripple-slit ray slide and power supply.
2) Place the mirrors on your book as indicated below.Place the ray box at the top of the page and shine       the three rays at the mirror.
3) Ensure the middle ray of light is hitting the mirror at a 90* angle.
4) Carefully trace the direction of the three incident ray and the three reflected rays.
Concave
Convex