Team Wybar vs Team Purcell

This morning two of our Year 7 classes had a competition over which type of indigestion medicine was the best - tablets/powder or liquids. They have been learning about neutralisation in their recent Science lessons and looking at how these medicines would neutralise excess stomach acid.

First a team captain was chosen from each class. The captains had to pick which type of medicine they would be testing. 

Team Purcell got liquid medicines:

With Team Wybar selecting tablets/powders:

Then the teams separated to get down to work.

Each group carefully measured one maximum adult dose of thier medicine using a number of techniques such as measuring cylinders, teaspoons, scales and those who had large tablets crushed the medicine in a pestle and mortar before dissolving it in warm water. 

Then they started to add acid to the medicine, checking the pH at regular intervals. 

The medicine which would neutralise the most acid was the most effective. We also compared the price of the different medicines. 

The two teams met again at the end of the lesson to reveal their results. The atmosphere was tense.....

The medicine that could neutralise the most acid was also the cheapest medicine that we tested. It was the Sodium bicarbonate powder. Well done to both classes for some great scientific skills and congratulations to Team Wybar for their victory. 

Year 3 bite off more than they can chew

 

First a good clean 

 

 

Now chew on the disclosing tablet 

 yum yum???????

Ohhhhhh

Something reddy 

 

 

 

 

 

 Better clean again

 

 reach right to the back and get all the teeth

 

 

 

that's better all clean

Bend it like 8G

Today 8G investigated refraction and how light can bend when it enters an optically more dense medium like glass or perspex.

 The ray was shone at a perspex block

the angle of the ray was marked as it entered 

and left the block 

the ray of light bends at the surface 

 this is called refraction

and explains why a straw seem to bend in a glass of water

8S test Max's reflection hypothyesis

Max made a prediction about the angles of incidence and reflection so we tested it in the lab.

 They used ray boxes to create light rays

Then the rays were marked 

 and measured

and a new angle of incidence set up 

and the process repeated

 a number of times

to get enough results to draw a graph

Then we can compare the results and see if the angle of incidence does equal the angle of relection.

 

Halloween draws close

As Halloween time draws near we have been experimenting with pumpkins:

8G see the light

8G started their new physics topic "Light" with an experiment investigating reflection. 

The lab needed to be in darkness so lights off and blinds down

Shine the ray at the mirror 

Mark the reflected ray

Then use a different angle of incidence 

Accurate marking is important

Sharp eyes and sharp pencils 

Neat work is important

Lots of results will give accurate graphs

Plotting the graph shows us that the angle of incidence equals the angle of reflection.