Sunday, 2 July 2017

Science week 9

This week we observed the slingshot rocket, angle launcher and flipping frogs. We noticed for the slingshot rocket when you fire it you have to flick your wrist down als

What I go hard ato that the rocket uses elastic potential energy. We inference using clues that if we didn't flick our wrist down then it would've hit the stick and be blocked.

We noticed that the flipping frogs also use elastic potential energy and that different designs went higher than others.
I think that this happened because of the shape and condition of the frog along with how tight the rubber band was.

We noticed at 45° angle the projectile went around 90cm with the launcher we used.  45° is the angle with the furthest distance compared with all the other angles. It moved faster on the ground than what it did in the air. This is strange because the ground has a rough surface, and also using my prior knowledge, on the America's Cup they describe the speed with how much fly time they have.

Thursday, 22 June 2017

Science week 5

Week 5
 This week we did the trebuchet and the onager which both are a types of catapults. we had to observe the difference  between the two catapults.  I noticed that the trebuchet goes alot further. I think it's because it has lots of weights so it can go alot further, then there's  the onager, the things I noticed about the onager is that it goes alot faster. I think it's because it has a longer arm.

Science week 4

Week 4
This week we did the trebuchet which is a type of catapult. I noticed that it didn’t go as far as you would might have thought. I think it was because at the start we only put in one weight. So it didn't go that far. But when we put more weights in it started to go 20 plus metres. But it still didn't go as far as you might think. I wonder why it didn't go as far as you  might imagine. I am multistructural because I know what we were doing, but I don't know why we did it at the time.

Science week 3

Week 3
This week we did the balloon rocket again apart from this time we used fishing wire instead of paper. I noticed that with the fishing wire it goes a lot further then with wool. The learning in this activity was to see what worked better wool, paper or fishing wire. I figured out that fishing wire works the best because it's nice and smooth, so the force of the balloon doesn't slow down and  it can move further and better. I am relational because I can do the experiments without needing to ask for help, and I know what the learning is during the activity.

Science week 2

Week 2
This week we did the balloon rocket, but when we got up to the experiment it didn't go that well because when we blew up,when we let go of  the balloon it didn't move. The learning in this was to read the instructions before we do the experiments. I am multistructural because I know how to do the experiments, but when we do the experiments I don't know what the learning is, when I am doing it.

Science week 1

Week 1
Before school this week we made slime. I thought it would have smelt like old milk with lots of bubbles  that don't go away, and that it would look gooey, runny, and have massive lumps. When we finished it turned out gooey and runny, the learning in this activity is to see what it turns out when you do different things to it,what it does and what it looks like. I also learnt the four forces drag thrust weight and lift. My learning is multistructural because I can do all the experiments but I don't know why we did it.

Science week 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’s 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.