Density experiment

WHAT IS DENSITY

Density defined in a qualitative manner as the measure of the relative "heaviness" of objects with a constant volume.

For example: A rock is obviously more dense than a crumpled piece of paper of the same size.
A styrofoam cup is less dense than a ceramic cup.

Density may also refer to how closely "packed" or "crowded" the material appears to be - again refer to the styrofoam vs. ceramic cup.     

EXPERIMENT

1. Get your hands on six cups. They don't have to be the same size, and they don't need to be clear, but it will help add to the experience.
2. In each of the six cups, add one of six different amounts of salt.
   ▪ 0.5 tsp
   ▪ 1.5 tsp
   ▪ 2 tsp
   ▪ 2.5 tsp
3. With the salt in each cup, some warm water. Stir the solution until all of the salt has dissolved.
4. Using food coloring dye the solutions in each cup a different color.
5. Hold the straw near one end, wrapping your four fingers around the straw and placing your thumb over the straw's opening.
6. Dip it into the first test tube, release your thumb and quickly put it on again.  Repeat with the other tubes.  You should end up with a rainbow effect inside the straw
7. HOW DOES IT WORK?

Density is the measurement of how much "stuff" is packed into a specific space. That's how we get the equation for density. Density = Mass (stuff) ÷ Volume (space). Nearly every substance and material imaginable has a different density. This is especially the case for the solutions you make out of salt and water.

By varying the amount of salt in the solution but keeping the water consistent at 9 oz, you create solutions that have different densities. The more salt is mixed into a water-based solution, the higher the density of that solution.

FUN FACT: This dramatic salt water density change can be experienced in real life. While humans will (sort of) float in the oceans of the world, we really float in lakes like Utah's Great Salt Lake and the Dead Sea in Israel and the West Bank.

So density explains why the liquids stack atop each other inside of the straw, but how do the liquids stay in the straw? That has to be water wizardry! You expect the solutions to pour out of the straw as you remove the straw from being submerged. However, thanks to cohesion (like molecules attracting each other) and adhesion (different molecules attracting each other), there is surface tension at the bottom of the straw. The surface tension is strong enough to hold the solutions in the straw… as long as air pressure isn't added to the equation. That's why you need your thumb to cap the straw. This removes air pressure from pushing down on the solutions in the straw. Remove your thumb and the added pressure forces the solutions out.

The trip from India to New Zealand

Yesterday in Delhi, I went to the airport. I was happy to go to New Zealand and I was happy that I am going to sit in the airplane because  this was the first time that I had ever been in an aeroplane.  I travelled with my Uncle, Auntie and cousins.  We travelled for two days and when I arrived into Christchurch airport, I met my father I was very  happy to meet my father their we drank coffee together.  I had not seen my father since 2003.                                                                                                                                                                                                                                                                                                                                                                                                                                          
                                                                                                                                                                                                               
We travelled in my Fathers car and went to nelson. my dad and I went to his house we came inside and had tea we had  pizza . i was tired and we went to sleep .The next day I got ready for school at B.I.S i am in Room 5 my first day was amazing i had made some friends and i love New Zealand.

There is a difference is no noise and in India people go here and there in night. people throw thing here and there in India and in New Zealand not throw rubbish.There are big big building in India and in  
 new Zealand There are no big big building.

By Rahul

sabian science explanation

tehya volcanoes

Volcanoes

In room 5 we have been learning about volcanoes: why they erupt, How movement of plate techtonics form a volcano.

1. Why they erupt.

There are several factors that will trigger an eruption like: the buoyancy of the magma, the pressure from the exsolved gases in the magma and the injection of a new batch of magma into an already filled magma chamber.

2.Why do volcanoes become dormant.

Volcanoes become dormant because magma from the earths core can no longer reach the volcano


3. How can the movement of plate techtonics form a volcano.

A hill with a dent like a cupcake and has a cut in the earth where lave and ash come out of.



Now in room 5 we are making small volcanoes made of: card, a glass bottle, newspaper and paint.

We watched a video off the internet which is really easy to follow for all ages and its really fun to make.  The instructions were as follows:

First, take an A3 piece of paper and cut a small hole in the middle turn it into a cone like shape if its a bit crooked thats ok because you need to cut it anyway.

Second, tape the cone so that your glass bottle top can fit through to put your vineger and baking soda in the top.

Third, tape it to a another card so that nothing falls out of the bottom, now you are ready  for painting once the paint dries its ready for vineger and baking soda don't put that in yet were not sure how much yet but I'll be here next week to tell you how much and what happened bye.

By Tehya

Room 5

Colour changing chemistry

Colour changing chemistry

Tom and Angus found this experiment on the internet.Rapid Colour changing chemistry is what it is called.We did this experiment because it was on the internet and it looked cool.

Our test was to see which temperature of water works the best! First we got our ingredients, we had 3 cups filled of different ingredients and our experiment worked. 

  Our test was to find out what would make the water change colour using Iodine, hydrogen peroxide, warm water, liquid starch and vitamin C smashed up with book. By Angus and Tom

sabian

Air powered rocket.

An air powered rocket is a simple contraption made from a bottle, card board fins ,a bike pump, cork and a bike pump valve.

Air fills the bottle-rocket as you pump. As you squash more  and more air into the bottle the pressure increases. Eventually the air pressure will be strong enough to push the cork out.

As the water and air come out the bottom of the bottle, the bottle is pushed in the opposite direction. When the water and air mix goes down, the bottle-rocket goes up! Because the bottle-rocket doesn’t weigh very much it goes a long way up. We put water in the bottle because water is much heavier than air. So the rocket will go further.

Long Lasting Flavour

We all had to work in a group to try and complete our question which was which brand of bubblegum will last the longest?

First we had our hypothesis, we guessed what was going to happen and then wrote it in our log books. (science books) Then we would type it up on the computer on pages and print it out

Next is the equipment, we needed loads of bubblegum brands, a stop-watch and an extra note book and call that a log book or science book.

Then we typed up the method. What we practically wrote was: We each got a piece of the same bubblegum and started chewing. At the exact sam time we started the stop-watch. When one of us had lost the flavour, we wrote the time down in the log book/ science book. Then we would go to the next piece of gum.

After that we done the result. The result is practically a bar graph or pie graph with the results on it and our longest time was 5 gum spearment flavour, but you could write some of it down too.

Now we are almost finished. Now it's the conclusion. There's three parts to a conclusion. One is we said what we would do next time to improve or what we would change. Then we researched up what the answers were before when someone else had done it. Finally we said if we were right with our hypothesis or not and then said the correct answers.

We reckon that the funnest bit about the experiment was actually chewing the tasty gum!!! 

By Joe, Levi and Keegan

We reckon that the funnest bit about the experiment was actually chewing the tasty gum!!! 

The Big Kill

The BIG Kill. Our science project question was 'Does Bleach and Coffee affect plant growth?

To do the experiment we had to start testing. first we go 9 plants, 9 plates and 9 pots. We then measured 50mls of bleach, 50mls of coffee and 50mls of water. We then selected 3 different plants and watered them with water. Then another 3 with coffee and the last 3 with bleach. Before you water them you have to take the plants outside and bring them in at the end of the day. When you water the plants make sure that you water them with the same amount of bleach, coffee and water. The bleach plants died and the coffee and water plants survived. 

We then had to take results like measuring the plant and put that up.We had to type up the hypothesis, the method, the purpose, the conclusion, the equipment and the question. After we had printed out all of the stuff and the pictures, we had to back them onto black paper and stick them onto our science board.

Mrs. Parker had to choose 4 boards out of or class to be marked by some people from Nayland Collage.  Our board was one of the 4 chosen to be marked. Our board didn't get a placing but we got commended work which is pretty much known as 5th place. 

By Rose and Amber

How Air Rockets work

An air rocket requires a pump to pump in compressed air to shoot the rocket into the air.

Air rockets are inventions that when pumped with air will fly into the air like a bird. It works like this:when attached to a pump the rocket will be hollow but a tight fit that when its pumped enough it will fly into the air after a while(if it has it installed)the the air will rush to the top which will be loose and the air inside will push it off revealing a parachute the parachute will ensure your rocket will be fit to fly again!

A air rocket is made with fibre glass,plastic,etc or can be made with plastic bottles an old tire pump and a bike gauge(ask your local garage if they have any old spares for free or, if necessary buy one brand new at a bike shop)also if using a bottle you will need to fill at least quarter of the bottle so the air is trapped in a tight space.

Air rockets are very good to use in OPEN areas where there is no air traffic(don’t wanna shoot an aeroplane down D:)as these are dangerous to use in a crowded air space.

Air Rockets are used as pleasure item's,at concerts and music festival's etc. 

By Xander 

The Hovercraft

Science Project

The Hovercraft

A hover craft is a very simple contraption...

For our project we made a hover craft. 

It is made from-  a balloon, bottle top , other materials and an air pump.

Our test was to see which material works the best! First we made our hover crafts, we made around 5 different crafts to make our experiment work. We used styrofoam, a cd card, cardboard and a plastic plate. 

We tested them on a flat surface and used a ruler,we tested each about seven times each so it would be a fair test.We found out that the Cd worked the best for our hover craft because it had the smoothest surface.

By

Isabella, Emma and Brylee.

Ice ice baby

Room 5 have completed their science fair projects. The 'Ice ice baby' group decided to do an experiment about how colours absorb and reflect heat. We wanted to find out whether lighter or darker colours absorbed the most heat. We found this out by placing an ice cube on different coloured pieces of paper and seeing which ice cube melted the fastest.

Our question was: "What colour conducts heat and makes ice melt the fastest?"
Our hypothesis was that we thought the black would melt the ice faster than the other colours, but it turned out that the the white made the ice melt faster.

Dark colors absorb more heat than light colors, causing a dark surface to become hotter than a light surface made of the same material and exposed to the same heat source. Lighter colours reflect heat, so the light went through the ice, hit the white sheet of paper and reflected back through the ice, which is why white was the fastest.

We had Teachers from Nayland College to Judge our science fair boards and ice ice baby got Highly Commended and Mrs Parker judged our boards and ice ice baby got the best score in the class 17/20!! Yay!!

By Jess and Ashleigh 

AIR BAGS

In our science fair group there was Tehya, Rahul, Xander, Jeremy.We tested variable amounts of baking soda ,tartaric acid and water in a sealed plastic bag to see how much the plastic bag would inflate.
The one that was the most successful was the mixture of 3 tsp of each components because the bag inflated to almost full capacity.This is caused by carbon dixode  being produced and released.