The first problem we chose to investigate was “Which balloon is stronger: a balloon with a small amount of air or a balloon with a large amount of air?”
We made 2 groups of balloons: in the first group we filled 18 balloons with 2 breaths of air each, and in the second group we filled 8 balloons with 4 breaths of air each.
Each group of balloons was put under an upturned table and to test the strength of the balloons students stood on top of the table. Surprisingly students said it felt just like floating on water in a boat.
The results were recorded in a table:
Balloon Boat with 18 balloons x 2 breaths each Balloon Boat with 8 balloons x 4 breaths each
Total people on the boat = 13 Total people on the boat = 6
Total mass on boat = 328kg Total mass on boat = 132kg
Total time before balloons began popping = 4 minutes Total time before balloons began popping = 1 minute
Balloons are stronger with a smaller amount of air in them.
Our next experiment will be testing a hypothesis:
Hypothesis: The more air you put in a balloon the weaker it gets.
The second problem we chose to investigate was finding the best construction to hold up a mass of 9kg. We put 9kg of books in a cardboard box. We chose to use only 20 wooden blocks of any shape or size from our wooden blocks box. We decided that the construction had to hold the box above the floor by a minimum of 30cm. It also had to hold for at least 10 seconds. Our findings were surprising! Some of the more unusual construction designs were actually very strong. Our next quest is to repeat this experiment but to also test for stability.
Because this week was the last week of the 2016/2017 school year we decided to clean, tidy and reorganize our classroom from top to bottom. It was a hard 2 hours of work but very satisfying when we were finished to see everything so neat and clean ready for the 2017/2018 school year.
Exercise each day has been a little difficult with the weather: rain, sleet, snow, and rather cold. We did have one day that was perfect in the morning so students were able to increase their circuit tally for running, jogging, and walking. We have been recording the distances completed on this 330m exercise track since April 2016 and some students have passed the 100km mark!