Tag: Year9

Hot Air Balloons

Aim:

I want to find out how a hot air balloon works and if I can build my own.

 

Research:

 

Method:

Equipment

  • Tea candle
  • 2xbamboo sticks
  • 4x straws
  • Medium-sized bin liner

Instructions

  1. Sharpen the un sharpen part of your bamboo sticks
  2. Take the Tea candle wax out of the tin.
  3. Make holes on all the sides of the tin at least 1.5 cm apart.
  4. Poke the bamboo sticks in the hole making a plus sign
  5. Stab the straw in the middle with the bamboo sticks. Using all the straws on each side.
  6. Glue the tin candle onto the sticks in the middle.
  7.  Get a thin layer of plastic, and glue it onto the straws.

 

Results:

 

Discussion:

The experiment did not work because it did not fly, it did look like it had air in it but the heat was melting the plastic. How a hot air balloon works is that when you light the fire. It warms up the air inside making it warm, and you know warm air rises which makes the hot air balloon rise too. While the cold air moves down it kinda keeps doing the same thing. But when the hot air balloon goes down, you have the lower the heat so the air in the sky gets cold and eventually the hot air balloon will fall back down slowly. No the only reason why it probably didn’t work is because we used plastic. But hot air balloons use Nylon and Polyester which are stronger and also bigger.

 

Spencer Westmacott

Spencer Westmacott

Spencer Westmacott was a Lieutenant in the army, born in Christchurch 1885 but then died in Wellington, 1960. Before he went to the army he was working on his fathers farm and enjoyed landscape painting. He was also a supervised School Cadets at Trentham,

Wellington – his only break from farming. During the events of World War I, he was an Officer with the Auckland Infantry Battalion in the main body of the New Zealand Expeditionary Force which departed New Zealand for the war-stricken continent of Europe on 16th October, 1914. Lieutenant Spencer Westmacott was one of the first men to land on Gallipoli on April 25th. He reinforced the Australian line, but then his right arm was smashed by a bullet while holding off the Turkish attack. Before he went to war, he said, “When war came, I must go. I had the chance to lead men. I could show what I was made of, in the greatest test of all. After he was shot he was evacuated that night to a military hospital in Alexandria, Egypt. There his right arm was amputated. 

 

After the war ended in 1917, Spencer got married to his childhood friend Jean Campbell, and had met again during his convalescence. After the war he attended art school. He and Jean had a son and two daughters; they eventually returned to his farm near Te Kuiti. But then during World War ll Westmacott commanded the Otorohanga Battalion of the Home Guard. He died in Wellington in 1960.

 

Dilution of the Solution

Aim:

I want to find out how to make a concentrated solution more dilute.

 

Research:

Method:

Equipment

  •  Safety Glasses
  • Test tubes
  • Test Tube Rack
  • Water
  • Dropper
  • Potassium Permanganate crystal
  • 10mL Measuring Cylinder

Instructions

  1. Get your equipment ready and be safe.
  2. Fill the first test tube with 10mL of water, using the measuring cylinder.
  3. Fill the remain test tubes with 9mL of water.
  4. Put one crystal of KMnO4 into the first 10mL test tube.
  5. Using the dropper, extract 1mL of the first test tube and add it to the second test tube.
  6. Clean the inside of your dropper.
  7. Using the dropper extract 1mL of the second test tube and add it to the third test tube.
  8. Clean the inside of your dropper.
  9. Using the dropper, extract 1mL of the third test tube and add it to the fourth test tube.
  10. Clean the inside of your dropper.
  11. Using the dropper extract 1mL of the fourth test tube and add it to the fifth test tube.

 

Results:

 

 

Discussion:

The experiment went well we added 1mL to each tube. It got less diluted each time we took 1mL out of each tube and passed it on to the next one as you can see on the picture. Or in other words, the last one is the least diluted because we took 1mL out of each tube and put it into the next which will make it less diluted. Because there is more solvent than the solute. The most concentration one was the first one because it was the darkest and the first one. The first ever tube was 10mL and the rest of the tubes are 9mL. So as we add more water to it it got lighter and more dilute. Just so you know the most dilute means it has more solute in it and the less dilute one means that it has less solute in it. This may not make sense.