## Wednesday, 5 July 2017

### Science Blogs

Science Blog Week 4
This term has been science term we have played and made lots of things like catapults and rocket balloons and tug of war this is what we did.

I learnt that if there's elastic bands on the cotton ball the ball will go a longer distance because of the weight. When you put an elastic band with a cotton ball and that it is easier to make a catapult that has the cotton balls without rubber bands go high then it is to make a long distance launching catapult.
I also learnt that in tug of war it doesn't depend on the height or the age that wins tug of war it's the strength.
I wonder how successfully a catapult could launch if there were three spoons on the catapult my group made because the spoons would be on top of each other.
I also wonder what it would be like if you had the teams as age groups and how strong each age group is.
I wonder if the balloon rocket goes the whole way down if you use a moving object as one of the parts you attach the string to.

Science Blog Week 5
This week we have gone back to one of the activities and I have chosen to go back to catapults I did this with Tejas.
We were having the spoon being placed higher up Tejas and I discovered that when you place the spoon higher the spoon goes lower and
the gravity pulls the spoon down and the amount of force so the spoon can fly up fast so the cotton ball goes further.
I wondered how far the cotton ball would go if there were rubber bands on the cotton ball with our catapult.

Science Blog Week 6

This week we got to decide what activity we wanted to try out of ping pong ball basketball bounce and pulley chairs I chose to have a go at making ping pong ramps. The first time we used books and leaner board and we worked at the tiered seating.
The first time we needed the books to hold up the leaners so the ping pong ball could roll down and bounce on the leaners.
My wondering was if half the ramp was made of carpet.
So the next time we got a chance to make the ping pong ramps we made half of the ramp carpet it didn't make much of a difference because it was rolling down at such a high speed that it didn't really slow down.
The second time my group tried the ping pong ramps again and we tried the zig zag bouncing strategy and it worked quite well because the
ball went down at high speed and so the ball could bounce side to side and it went through the whole set up.
We wondered if we set up another roller at the top and have a marble run down the roller and drop in the small hole at the same time as the other ramp
For the ping pong ball.
I wonder how much friction the carpet squares had and also I wonder if a marble could run down the carpet squares after going down the ramp
or a cotton ball I think a cotton ball would only fall off the ramp or stop at the carpet squares.
The people I worked with were
Ethan
Tejas
Josh
And
Finley
Overall I learnt that when the ramp is really steep the ping pong ball has enough speed to get over three carpet squares.
I wonder what my golf course will look like next week and what it will be made of.

Week 7 Science Blog
This week we went back to what we choose out of the catapults and the balloon rockets. The one I choose two weeks ago was catapults.
so my group went back to catapults. this time we were measuring the distance of how far the catapult launcher could fire the cotton balls. We did 11 tests but each time we added another rubber band.
I discovered that each time you add a rubber band to the cotton ball the cotton ball would go further our longest distance was 10 meters and 96 centimeters.
The people I worked with were Ethan and Tejas they are a good group because they are turn taking and wait patiently so we can get lots done.
We also discovered that when we launch our catapult with five and six rubber bands the cotton ball hits the roof so we can't fire and measure the ball because the cotton ball would just hit the ground straight away so we couldn't get the right measurements.
We fixed our problem of the roof hitting by going so the shelter roof was only in reach when the cotton ball was at a lower height than the shelter roof.
I wonder how far the cotton ball would go with 7 rubber bands if 6 rubber banded cotton can go 10 meters and 96 centimeters.
The next time we did golf we got to chose out of pulley system and the golf course my group choose the golf course the people I worked with were Finley, Ethan and Tejas.
The things we used were a chocolate container, the lids for the chocolate box, a foam water gun the book container and a ruler.
We used the chocolate box as the holes for the finish part the ruler so the ping pong ball could run down it the book containers for holding the ruler and the lids were for having the ball run down the lids like a ramp.
The push and pull in this was that the foam water gun that we used as the golf club had to push the ball and the lids were smooth so the ball would push
down the lids and go in the holes.
I wondered if we adjusted the ruler so it was steeper and how far or if the ball would roll down the whole ruler.
We learnt that if you hit the ball too hard the ball will roll of the ruler.

Science blog Week 8
This week we have been continuing the catapults and rocket balloons. The force we used
was getting pulling the spoon back so the force the cotton ball would make the spoon come back up so the cotton would fly and go a good distance.
Force can make other force change direction if it pushes or pulls the other force.
Isaac newton's laws of motion
The first law is inertia: an object will continue be as is, until a force changes it.
The second law is Acceleration: is when an object is increasing speed.
Third law for every action there is an reaction.
The things we used were cotton balls our catapult and rubber bands also a meter ruler.
We saw that the cotton ball would go further every time we added another rubber band. When we were doing three cotton balls the ball went further on the first time than it did with 1 cotton ball but it didn't go as far on the other goes. I think it was because
the three cotton balls were too big for the catapults spoon so it didn't go as far as I thought.
I learnt that a plastic spoon isn't big enough to fire three cotton balls a long distance.
I wonder why the spoon can't fire the three cotton balls a long way because the cotton balls still balance in the spoon.
I worked with Ethan and Tejas,when we got three more cotton balls the ball didn't go as far because of the spoon size.
We also used a diagram to draw out our results.
I only got to do one graph of the results
because we only  got to halfway through the three cotton ball one because we kept having to put the rubber bands on because they kept falling off.
I also wondered why the cotton ball had started to land in a different section because it was going like 4 meters to the left so we had to measure the
angle so we don't move the cotton ball.
I also learnt that when you have 8 rubber bands on
the three cotton balls it's the size of one cotton ball with one rubber band.
Also I wondered why the cotton ball was landing
5 meters to the left from where I fired the cotton balls because it was let free in a straight line.
The steps to the catapult activity the first step is to get your catapult book, and your cotton ball with
the rubber bands. The second step is to pit the next rubber band on and fire the cotton ball.
The third step is to measure the distance the write it down in your book.
When you've done all of the 11 tests you do the same but with 3 cotton balls.
The fifth step is to draw a diagram.
How to make our catapult:
Step 1 get 11 popsicle sticks and tape them beside each other and that's the base.
Step 2 is to get four popsicle sticks and make a triangle with two popsicle sticks and tape
it standing up to the base and use the other two to tape in the middle of the triangle.
Step 3 is to put one popsicle stick and it across the triangle part like this.

The next step is to get 4 rubber bands and and a spoon and tie it up with the triangle part.
And that's how it should look like.

Science blog Week 9/10
So far this week we have been planning a balloon powered vehicle, a playground or a
game using the learning and discovery we have made with force this term I choose to do a balloon powered rocket.
The people I'm working with are Thomas, Ethan and Edward.

This is my plan
Where we are working: we are working at the art table.
Because if we work anywhere else everything will be hard to put in a good place and the pieces will get bent.

What we need: we need a big square of cardboard, 4 milk bottle lids, 3 balloons, 8 kabob sticks, 1 rubber band, 1 hot glue gun and Sellotape.

Who I'm working with: I'm working with Ethan, Thomas and Ethan.

What we need to organise: we need to organise who's bringing what and a hot glue gun.

Steps:
The first step is to get all the equipment to school so we can make the plane.
Step 2 is to cut the cardboard into the shape of wings so it can glide.
Step 3 is to cut out the underside where the wheels will be attached.
Step 4 is to hot glue the wings and the underside together in the shape of a paper plane.
Step five is to tape the balloons to the underside of the plane.
Step 6 is to tape three kabob sticks to each other twice and make a hole in the milk bottle lids.
Step 7 is to put the kebab sticks through the milk bottle lid and then attach the kabob sticks to the underside of the plane with the milk bottle lids on.

This is what I should look like

The force in this activity is that the wings will be measured so the balance is good and the balloons will be pushing the plane along with its power.
I wonder if the plane is going to work out because I'm wondering if anyone will forget something, or if it doesn't work out, and the last wondering is if anyone is being silly.

This is our process

We figured out that we hadn't measured the wings properly because when we hot glue gun the stick that holds the wheels to the plane it helped the balance more but not enough.
Also after we tried the plane out it didn't turn out as well as we expected it to go because it turned out as a balloon powered car because no one was thinking of getting the other balloons so we were just using one and it was on the top so the plane couldn't lift.
That was because the balloon was keeping the plane down because it's at the top so it can't lift the plane up because it's to hard to do that with gravity.
So we should have stuck the other balloons on the underside of the wings.
I wonder if when we do this next time we attach two balloons on the bottom of each wing if that will lift the plane up.  Also next time we should redo the wings so they are more even.
The force we used in this was
balance. I folded when the wheels had to be balanced so the whole plane was balanced.
Gravity we used gravity when we used gravity when we were testing  the plane with the balloon at the top by keeping the plane down/that was not our plan.
Push the push we used in this was that the balloon would push the plane forwards by the air coming out so the plane would go forwards.
Friction the friction we used in this was that friction would slow the plane down when the balloon was running out of air.
Acceleration was when we let go of the balloon and the balloon would push the plane as soon as we let the balloon go and it would accelerate.
Next time we should have a ramp, have the balloons at the bottom,have better measurements with the wings and have board just behind the plane so the air hits the board and the plane will accelerate faster.
I wonder if our second go will go better next time because there is lots to improve on and all of us know what they are I think.

This is our second go
At the start we went to go get our plane and gear but the plane had been taken and we didn't find it the whole time and Thomas took the gear home and
forgot to bring it back.
So we had to use some paper a glue and popsicle sticks so we were making a slingshot paper plane so we tried to accelerate it with the sling shot.
but when I got back from maths they had made pretty much no progress so I had to help them to get back on the write track.

This is our third go.

This is the process of to of planes because one of them got ripped.

At the start we were making a new plane that was very small but then the group wanted to focus on last times on so we used the little one to balance the plane. A big challenge for us was to stick the balloons on because hot glue doesn't work and he tape kept flying around on the balloon so we just put one piece of tape facing the sticky side up and put other pieces of tape on the outside to stick that tape to the wings. We made some tape stick sticky side up because that's how we attached the balloons on.
I learnt that when you blow a balloon up to much it will have a hole in it.
The reason why the plane ripped was because we were trying to get the hot glue off so it would look better and Edward accidentally ripped a hole.