Wednesday, December 11, 2019

Christmas acrostic poem

Christ’s birthday is celebrated in joy 
Happy school holidays for all the  students
Reindeer from Santa’s sleigh soar speedily in the moonlit sky, delivering presents.
In the Northern Hemisphere, snow falls gracefully and fireplaces are lit up radiantly 
Santa’s appetite must be huge if he wants to eat all those salted caramel cookies 
Tinsel dresses and Santa costumes are a frenzy 
Mistletoe brings the whole family together on  Christmas night 
A joyous tune is coming from outside the house, it’s a Christmas carol, being sung by a children’s choir
Sleigh bells ring  faintly while Santa takes off with his reindeer 
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Sunday, December 8, 2019

rainbow water density tower

Rainbow Water Density Tower

Aim - To observe how substances with different densities interact

Materials
Glasses - 1 per group
Food colouring (red, blue, green and yellow - you can make purple and orange by combining two colours)
Sugar or Salt (and measuring spoon)
Measuring cup - 1 per colour (you can have 6 colours to work with, or limit it to 4 colours)
Measuring syringes 
Water (warm water from a tap or kettle)
Plastic spoons to mix the sugar and food colouring in the water
Pots of water to rinse syringes between each colour
Plastic plates or trays to protect the table from sticky sugar water



Results 
Since the colouring of different densities did not mix together the colouring with the lightest density went to the top and the deepest went to the bottom and the one with the equal amount of sugar stayed in the middle here is an example of the result.



Explanation 
Look at the websites below and also do research of your own - Then write a paragraph explaining ‘the science’ behind the experiment.  Why do we see the results that we did?

 Explanations 
The experiment ended up showing coloured layers of water.  This was because different amounts of sugar were diluted (dissolved) into each colour.  This meant that each colour had a different density.  Water or liquids with different densities don't mix.
Saveer & Arhans Result:




Rishi & Aaravs Result:

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ice fishing

Ice Fishing 
Aim/Purpose:
To see how salt can affect ice or react with ice


Materials 
  • Small paper cups, bowl or an ice cube tray
  • Glass of water
  • String (yarn or kite string works great)
  • Small stick
  • Salt
Steps/Method:
  1. Fill the cup or tray up with water and place it in the freezer.  You can also use ice cubes from your freezer and skip this step.
  2. When the water is frozen, remove the ice from the cup or tray.
  3. Put the ice in the glass or bowl of water. The cube will bob up and down in the water and then float on the top.
  4. Place one end of the string from the fishing pole on top of the ice cube and sprinkle salt on the ice where the string is touching. Watch as the water melts slightly and refreezes.
  5. After about 10 seconds, carefully lift the ice cube out of the water with the fishing pole. You caught a fish (ice)!
My results:
Salt - The string stuck really well to the ice and pulled the ice cubes up out of the water
Sugar - The string didn’t stick to the ice cubes and none of them were pulled up out of the water.  Some people started to see the ice cubes stick - but it then failed after that.
Flour - THe ice didn’t stick to the string at all 
Pepper - The ice didn’t stick to the string at all 
More salt than normal - The ice still got picked up by the string

Changing the variables
Don’t wet the string beforehand 
Use only a little salt
Using lots of salt 
Try to catch the ice using sugar instead of salt 
Try to catch the ice using pepper instead of salt
Try to catch the ice using flour instead of salt
Change the time period that you wait before trying to pick up the string.


Explanation - Why does it work?
When the salt touches the ice it lowers the freezing point making it melt and refreeze and stick to the fishing rod. 



Resources:









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Sunday, December 1, 2019

freshwater biomes


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temperate and tropical rain forests



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Water Filter Experiment 
Aim/ Purpose - 
To filter or clean water using a number of materials 
How to clean/filter water - making it clean
Materials -
Sand, 
gravel, 
activated charcoal, 
cotton wool, 
plastic bottles cut in half,
bucket of dirty water (can make the water dirty with soil or whatever from outside)

Predictions - What is going to work best?  What steps/process and in what order - why?

2nd layer up - gravel - The gravel will grab onto the dirty parts and the clean water will drip off the gravel through the gaps.
Second Layer Up  - Charcoal - Second smallest material, can absorb the things not cleared by the bigger materials.
Third Layer Up - Sand - Turns hard when it’s wet - Take all the bigger dirt particles 
Top layer - Gravel - All the hugest dirt particles out first.  

Method/Steps:
  1.  First, you put 3 cotton balls ate the bottom.
  2. Next, you sprinkle activated charcoal.
  3. After we put 1 ½ spoon of sand on the charcoal.
  4. Fourthly we added 3 big gravel rocks.
  5. Finally, you pour the dirty water in the bottle and wallah fresh water. 



Explanation - How did it work?
When you pour the dirty water into the bottle it will gradually go down to the charcoal and from there the Charcoal takes away all the bacteria and that’s why it ends up clean.





Why is it important for cities/towns etc to purify and clean the water before it gets to peoples’ homes?
So people won't get sick and will always have to drink dirty water. If they drink dirty water their health will get very bad and they will die so that's why you need clean water.
    






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