Growing seeds

Aim: To look at the different growing conditions and how these affect the growth of seeds.  

Method: We worked in groups of 3-4 studentsPotting mix was put into the cups.The cups were planted with radish seeds.Each cup had different growing conditions:Cup 1 - normalCup 2 - red cellophaneCup 3 - overwateredCup 4 - Under watered or green cellophane

The plants grew in their cups for 10 days before they were measured. 

Plant growing condition	Height after 10 days (mm)
Normal	50mm
Green cellophane	0
Red cellophane	0
Overwater	50mm

The normal seedling was planted in normal potting mix and grew to a height of _________mm.
The green cellophane seedling was planted in normal potting mix, covered in green cellophane and watered. It grew to a height of ________mm. The red cellophane seedling was planted in normal potting mix............. to a height of ___________mm. The overwatered seedling was planted in normal potting mix, the water could not drain out the bottom of the pot and it grew to a height of ______mm
Conclusion:
From the pictures and evidence, we can conclude that:
The seedling height was:
1.
2.
3.
4.
The best growing conditions were:
1. normal
2.
3.
4.
therefore the seedling with _____________ conditions grew to a height of _________mm.
Photos:

       

Transport in Plants Science

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

Method: 
1. make a cut across the base of celery stalk to expose a new section of the stem. 

2. fill the Petri dish with water and add a few drops of food coloring. 

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.   

            

Science WK3 T3

Refraction through Lenses

one of the most import uses of refraction uses of refraction involves lenses. by controlling how much and in what direction, light bends we are able to see heat objects and send information. A lens is simply a refracting object with a curved surface. the two main types of lenses are convex and concave.

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

    

Refraction

Aim: to investigate how light is affected by changing the substance it is traveling through.
Equipment: ray, box power source glass or perspex block single-slit ray slide.
Method: collect the equipment from your teacher, and set them up to produce a single beam of light.
10°

reflection WK2 T2

T2  WK2:

Aim: to investigate the reflection of light rays in concave and convex mirrors

method: set up your ray box triple-slit ray slide and power supply.

place the mirrors on your book as indicated below. place the ray box at the top of the page and shine the 3 rays of light at the mirror.

ensure that the middle ray of light is hitting the mirror at 90° angle.

carefully trace the direction of the three incident rays and the three reflected rays.





Result: with the concave mirror, the light reflected in the other direction, and with the convex mirror the light reflected outwards.

scince week 2 2018

Aim: to investigate how light behaves when it hits a plane (flat) mirror

Method: 1. collect a ray box, power supply and single-slit ray slide from your teacher, and set them up to produce a single beam of light.

2. place a plane mirror on the diagram of the protractor as described below.

3. vary the angle of incidence and record the angle of reflection in the results table.


Results: the angle of incidence is the same as the angle of reflection

(10° angle of incidence)