Wednesday, December 11, 2019

This is my Christmas acrostic poem.enjoy!.

Christmas Acrostic Poem

Christmas ornaments decorate the lush, green tree beautifully
Happiness and joy fill people’s hearts with warmth
Reindeer obediently lead Santa’s sleigh with pride, gliding it through the air to deliver presents to the children of the world.
Icing on delectable cookies makes Santa jolly and plump.
Santa enjoys hearing the sweet sound of Christmas carols being sung by childrens choirs.  
Tree lights glow and flicker brightly, making houses look festive.
Mistletoe is hung lovingly on the doors of people’s houses to welcome guests.
A special time to appreciate family and friends 
Stockings are filled with treats and goodies for those who have been well behaved all year.




at No comments:

Monday, December 9, 2019

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
The colours were not mixing only when we first since we squeezed it in too fast. The second time we put the colours in carefully and it WORKED! The layers looked like a rainbow.




Steps
Firstly, get a jug of hot water and 4 measuring cups. Put 400mls of water into the measuring cup. In one measuring cup put 2 tablespoons of sugar. In the second measuring cup put in 4 tablespoons of sugar, in the next put in 6 tablespoons and lastly in the last cup put in 8 tablespoons of water. Stir them all up till they almost look like normal water. In each cup, we put some food colouring. In water with less sugar but more food colour and in cups that have more sugar pt in less food colouring. Lastly, take a syringe and fill it up to 20ml then carefully drop it in making sure to wash out the syringe before you use a different colour. 


Explanation

 All of the colours had different amounts of sugar, causing the colours to have different densities and refuse to mix together. Since it won’t mix it instead makes a tower of all the colours from the first colour(the one with the most density) to the last colour laying on the top( the one with lesser density )

at No comments:

Wednesday, December 4, 2019

The Ice Fishing Experiment

Ice Fishing 

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


Materials 
  1. Small paper cups, bowl or an ice cube tray
  2. .Glass of water
  3. String (yarn or kite string works great)
  4. Small stick
  5. 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 before hand 
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?
Ordinary water freezes at 0% celsius. When you add salt to water it lowers the freezing temperature. The salt you sprinkle on the ice cube lowers its freezing temperature and, since the ice cube can’t get any colder than it already is, it starts to melt. A little pool of water flows over the ice and the string sinks into it. As the ice cube melts, It weakens the salt/water mixture in the little pool; the freezing point goes back up again. The ice refreezes and traps the string.  

Resources:



at No comments:

Water Filter Experiment

 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?
Cotton wool at the bottom - It will absorb the smaller dirt particles from the dirty water
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 - The 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:
Firstly we put 3 cotton balls in the top half of the cup. 
Then we put a sprinkle of charcoal on top of the cotton balls. 
After that, we put in  a few spoons of sand
Lastly, we put in some gravel


Explanation - How did it work?
The gravel takes all the large pieces out of the water
Then the sand to take and pieces that have passed the gravel and the sand hardens.
The charcoal absorbs tiny particles of dirt and other things
The cotton wool holds everything from falling through


Why is it important for cities/towns etc to purify and clean the water before it gets to peoples’ homes?
In New Zealand’s cities and towns, clean water is transported straight into our homes instead of going to other places before getting to other peoples houses. We have water systems in place to make sure it is safe for drinking, and to manage what happens. It helps stop the causes of illnesses and catches types of bacterias and algae.
























at No comments:

Monday, December 2, 2019

Baking soda and vinegar experiment.

Inquiry experiment  


Aim/Purpose : 
To see what happens when baking soda and vinegar mix/combine 
To see the reaction that occurs when these two substances are mixed

Prediction - What do we think is going to happen:
We think it will explode/ It’s going to blow up
The ziplock bag will pop open and the liquid will spill out
It could fizz up 
The bag might fill up with air 
Fizz up like soda when shaken
The air pressure created inside the bag will cause the seal on the bag to pop open

Steps:     
  1.  Open up a paper towel on a flat surface
  2. Put 4 levelled teaspoons of baking soda in the centre of the paper towel
  3. Wrap up the baking soda in the paper towel like a package - Keep the baking soda concentrated in the middle of the paper towel
  4. Tape down your package of baking soda with a piece of masking tape so that everything stays in place
  5. Open the vinegar and pour it into a cup - until the cup is half full
  6. Then open a zip lock bag and pour the vinegar into it
  7. Hold the package inside the zip lock bag, making sure it doesn’t yet make contact with the vinegar - then zip up the bag - making sure that it is completely closed
  8. Let the package of baking soda drop into the vinegar and shake the bag up a little so that they start to mix
  9. Observe what happens

Materials/equipment:

  • Baking Soda  (4 x tablespoons) 
  • Vinegar (half a cup)
  • Ziplock sandwich bags 
  • Plastic spoon
  • Paper towel 
  • Masking tape

Roles within the group:
  1. Presenter - conducts the experiment 
  2. Assistant - collects all the materials 
  3. Videographer - takes a video of the experiment 
  4. Recorder - Record the result





The Result - What did we see happen?
When we let go of the tissue paper containing the baking soda and shook the bag it fizzed up and popped




Variables - How could we change the variables?
Predict what might happen if we change the variables 
Experiment - Were our predictions accurate?

Put 5 or more teaspoons of baking soda into the package - Bigger explosion/more powerful 

It didn’t work as well as the normal recipe

Put more vinegar  - Bigger explosion/not pop  

Way less baking soda and wrapped in more paper towels - nothing - it would take a longer time to see a reaction 

Baking soda - With no package surrounding it - The reaction would happen instantly and uncontrollably 



The Science - Why did it happen?  Here are some websites to look at…. You may be able to find other websites too!

When baking soda and vinegar are mixed, it causes a chemical reaction that then makes it fizz up. The zip lock back is not able to hold the air pressure so it pops open and the fizzed up result of the baking soda and vinegar is released out of the bag.




at No comments:
Subscribe to: Posts (Atom)