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Monday, 26 June 2017

science journals

Week one
When I got to school in the morning, the class was starting to make slime. We learned what created good slime and bad slime and we experienced making it. We made it out of cornflour, water and green food colouring. We made two batches and one had a little amount of cold water the other one had a lot of hot water. The difference between the batches is that the one with the large amount of water soaked up the cornflour and turned out to be more runny. The other batch didn't soak up the cornflour and was a good consistency for slime. After we finished the slime we took it to Monday meetup to do a test with it. Mr Anderson was the target. I am relational because I have more than three ideas and they work together.

Week two
This week we were experimenting with balloon rockets. We used straws, wool, chairs and balloons. We did this to learn about forces and gravitational pulls and pushes. We recorded our ideas on a see, think, wonder chart. We did this by tying a string of wool to two chairs. After, we put a straw onto the string by threading it onto the piece of wool. We blew up a balloon and attached it with sellotape onto the straw. We let the balloon go and it spun around in circles, I think it's because I used wool and it didn’t go and it just spun around. It broke the wool off the chair. It was supposed to travel along the string. I am relational because I have more than three ideas and they work together.

Week three
This week we were continuing with our balloon rockets. This week we changed the string. Instead of wool we used fishing wire. We also changed the straw to paper.  It worked much more easily because the wool had fibres on it and the straw didn’t go smoothly down it. The fishing wire with the paper worked more easily because it was really smooth. The balloon went down the fishing wire smoothly and worked well.I think it's because of the fishing wire.
I am relational because I have more than three ideas and they work together.

Week four
This week we were observing a catapult, it's name is a trebuchet. We observed how the trebuchet worked. With the trebuchet it works a special way, it has a bucket with weights in it which make the projectile go further. The weights are the main idea for this catapult, if you put more weights in it goes further the furthest. My favourite part of the trebuchet is that when the projectile fires everyone looks at it like a rainbow.  

I am relational because I have more than three ideas and they work together.

Week 5/8

This week we were learning about the onager and the trebuchet. We tried to notice the similarities and the differences between them both.

We learnt that the onager uses twisted rope power to fire the projectile. We noticed that the projectile that got fired from the onager didn't go as high as the trebuchet and it also didn't go as far as the trebuchet. We also noticed that the onager went a lot faster than the trebuchet. The trebuchet arm was much longer and it was powered by weights.

The similarities are that with both you need to pull the trigger to fire the projectile because if you don't pull the trigger it won't fire. They both have a sling for the projectile to rest before it fires the projectile, because if they didn't the arm of the catapult would swing back towards your face. They are both made of wood so they are both quite strong and won't break easily.

In conclusion we think that the trebuchet can shoot a projectile much higher but the onager can go much faster. So we think that the onager goes faster because it has a shorter arm and has more power to shoot. The trebuchet has a longer arm because it's more likely to shoot over walls.

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