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Thursday, August 24, 2017

cross country

kia ora

This week it was cross country. Lots of school and lots of poople.

Friday, August 18, 2017

scince fair

Hello fellow bloggers

On Wednesday it was the science fair .My experiment was parachuting eggs and failed the first few times. I should tell you that five hard-boiled eggs gave up their lives during our parachute trials. After they were shattered and beyond help, I ate most of them. But  in the end everything turned out fine and we could safely parachute raw eggs to the ground instead. Read my science report and find out how we made it work.


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Parachuting Eggs
QUESTION.

Will a parachute made out of cardboard and plastic allow a hard-boiled egg to land without cracking when we drop it from the highest level of the junior playground ?
THESIS.
An egg is a kind of life capsule for a baby animal. Some animals like chickens lay eggs which have the baby inside a hard shell. Humans like to eat  chicken eggs and one way they cook them is to boil the egg whole for about 5 minutes. Then, when the egg cools down, you peel off the shell and eat the egg which will be a bit rubbery but tasty.  If a hard-boiled egg was dropped from the height of the top level of the junior playground, the shell would crack when it landed. Parachutes are devices made out of rope and fabric which people attach to themselves as a safety device in case they need to jump out of an aeroplane. As the person falls, the fabric fills with air and slows the speed of the person so that they can land without being hurt.        
HYPOTHESIS.
If you can make a parachute which lets a person fall slowly to the ground without being hurt, then you should be able to make a parachute do the same thing for a hard-boiled egg. We predict that we will be able to design a good parachute for an egg.

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EQUIPMENT
AND MATERIALS:
  • Hardboiled eggs
  • Plastic bag
  • String
  • Scissors
  • Plastic netting
PROCEDURE
  1. Do a test by dropping a hard-boiled egg from the top of the playground and observe what happens.
  2. Create a parachute using plastic, netting and string.
  3. Put the hard-boiled egg into the plastic net beneath the parachute and drop it from the playground.
  4. Observe what happens.
OBSERVATIONS:
When we dropped the hard boiled egg by itself it’s shell cracked and shattered, but it  didn’t crack completely. When we dropped the egg with cardboard around it, it looked the same as the one without cardboard but slightly better. Next we tried the egg with a bigger plastic bag and it had less damage.
So, we decided we should enlarge the canopy of the parachute by about three times.
When we dropped the egg using the enlarged parachute canopy, the egg landed safely with no cracks at all.






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ANALYSIS
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CONCLUSION
The goal of this experiment was to see if a parachute made out of cardboard and plastic would allow a hard-boiled egg to land without cracking when we dropped it from the highest level of the junior playground. The result of our experiment proves that our hypothesis was correct, we were able to design a good parachute for an egg. Our new knowledge gained was that the most important design factor for a parachute is to have a big enough canopy.

Wednesday, August 9, 2017

Learning how to read scientific reports

Kia ora

We are learning how to read and write scientific reports. We have been doing experiments and writing about them. This is a reading activity we did. We had to be able to match a thesis with its hypothesis.

We are learning how to understand the structure and language of a report about a scientific experiment #3 Understanding that a hypothesis is a brainy prediction based on what you already know.
In this exercise you need to match a thesis with its hypothesis.  Use the ‘Fill tool’ to colour code the matching ideas.
                               Thesis                                                                      Hypothesis
I know this……                                                                         So therefore if I do this I think this will happen…
I know that a puddle of water is a small amount of water lying (usually) on the ground. I know that water is a substance which is found on our planet and that it can exist as a solid (ice), liquid or a gas (water vapour). I know that the main reason water changes from one state to another on Earth is because of  temperature -heat or cold. On Earth a sunny day is when there are no clouds, the sky is blue and the temperature is usually warm or hot.
I predict that when I mix vinegar and baking soda together that a chemical reaction will occur and that I will be able to notice this. I might feel hotness or coldness, notice smoke or bubbles, smell something, hear some kind of noise or  find that the taste or texture of the foods has changed.
I know that heavy things usually sink and light things float. However, container ships are heavy but they still float so there must be more things that have an effect on floating than just weight. Blutack is a squishy material that is quite light. It usually comes as a wide, flat strip but you can shape it into a round ball, a sausage shape, an O shape etc or you could flatten it out into a thin, wide shape like a leaf or saucer. Leaves usually float and ships look a little like a leaf shape.
I predict that when I take an ice cube out of a freezer it will begin to change back into liquid water (this is called melting) because it will no longer be colder than 0 degrees centigrade.
I know that an ice cube is water which is frozen. I know that that liquid water freezes into ice when the temperature reaches 0 degrees centigrade. An ice cube will stay an ice cube as long as it stays in a freezer.
I predict that if I make a puddle of water somewhere on the playground on a hot, dry day that the puddle will dry up and disappear quite quickly.
I know that everything we eat is made up of different kinds of chemicals.Sometimes when you mix different chemicals together they react with each other in different ways and the substances will do things that they didn’t do before (chemical reaction) and become different to what they were like before (chemical change). You will be able to notice things happening by using your 5 senses to  listen, smell, feel, look at and sometimes taste what is going on. I know that vinegar and baking soda are both food substances and I learned that they are chemically different
I predict that if I take some ice cubes out of a freezer and wrap them in different materials, I will find that one material will keep the ice cube frozen for longer than the others. This material would then have proven itself to be the best insulator.
I know that liquid water changes into a solid (ice) when the temperature reaches 0 degrees centigrade. I know that a freezer will keep water solid because a freezer’s job is to keep food at a temperature just below 0 degrees centigrade.
We are going to use Bluetack as our material. We will use the same amount of Blutack to make three different shapes. One will be a straight, rectangular strip of Blutack, one will be a compact, round ball and the third will be a rounded  saucer shape like a boat. We predict that at least one of these will float.
I know that insulators are materials that can be used to protect yourself from too much heat or cold. When we put clothes on because we are cold, the clothes are insulators which help our bodies stay warm. If you put insulating material like Pink Batts in the ceiling of your house, in the winter the Batts help keep warm air inside the house. In the summer, The Pink Batts help stop hot air coming into the house so they help to keep us cool. Many  food containers like Thermos flasks and Chilly Bins are made out of insulating materials to keep food hot or cold.
I predict that when I put some liquid water into a freezer it will change from a liquid state into a solid state (ice) because the temperature in the freezer will be below 0 degrees centigrade.

Thursday, July 27, 2017

foaming and fizzing

Hello fellow bloggers

This term our theme is Up,up and away. That means we are learning about science. We did an experiment  where we had to taste baking soda and vinegar yuck! We mixed them together and recorded and what happened.


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yuk and yum
QUESTION.

If we mix vinegar and baking soda what would the reaction?
THESIS.
Vinegar tastes sour and it is a liquid. Baking soda is solid,soft white powder and it tastes salty and horrible .they are both  food substances but based on their different taste ,they must be chemically different . so if they are mixed together,there might be a chemical reaction
HYPOTHESIS.
We predict that when we mix vinegar with baking soda an observable  chemical reaction will occur . we might see and hear an explosion ,fire,foaming,bubbles .fizzing or something else . the resulting mixture might look and taste different . there might even be a difference in size of materials

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EQUIPMENT
AND MATERIALS:
Half teaspoon baking soda
Vinegar
Container for mixing
Teaspoon for mixing
PROCEDURE
Step 1: pour some vinegar into a container to depth of about 2cm
Step 2: use  a teaspoon to measure in half a teaspoon of baking soda.
Step 3: mix with a teaspoon.
Step 4: Observe and record what happens.
OBSERVATIONS:
At step 2 the mixture started to fizz. A fizzing sound was heard,bubbles were seen to appear in the mixture and the materials rose higher in the container. At step 3,when the materials were mixed even more bubbles appeared and the volume of the materials in the container rose even higher.when the mixture was tasted the taste was unpleasant and was similar to the baking soda

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CONCLUSION
The goal of this experiment was to see if an observable reaction would take place  when vinegar  and baking soda were mixed together . the result of our experiment proves that our hypothesis was  correct we predicted that there would be an observable reaction ,  and there was. There was lots of foaming and fizzing happening and bubbles appeared which means a gas must have been produced. A quick check online showed us that the gas was carbon dioxide.

Friday, June 30, 2017

zoo

Kia ora
This week we went to Auckland zoo for a sleepover. We slept in the old elephant house. This is a photo of some of the animals we saw.










I am working on an anmal report about Otters.It was bigger than I thought it would be.

Friday, June 23, 2017

my best friends

Hello  fellow bloggers 

 Today I am going to tell you who my best friends are. Their names are Crystal, Charlie, Louisa and Cerys.



Kiwi Kids' News

Hello fellow bloggers
This term we have been learning how to use Kiwi Kids' News. Kiwi Kids' News is  a website for kids to go on to keep up with the news all across the world. We have to find a piecee of news that we'd like to read about. Then we write the answer  to the question.
Here is my recent work: