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Term 2 reflection: Chemical change

In term 2 the year 5/6 did their integrated unit on ‘Chemical Change’. So every week 2 scientists from GTAC came into Moonee Ponds Primary school to teach us about changing state, the 4 states of matter and much, much more! I enjoyed this unit very much and I believe I benefited well from it.

3 facts I learnt were:

I learnt many things but here are some of my favorites:

I learnt that the change from a gas to a liquid is called condensation. So say you just had a shower and you didn’t have the fan on so there is a lot of steam in the room. Then the steam hits the mirror and it will go from being hot to being cold. So it will turn into a liquid.

Another thing I learn’t was the interests of gas particles. Gas particles stay a fair way away from each other. They bounce of the walls and of each other when they come into contact with them. When the particles get heated up they move faster and when they get cooled down they move slower.

pressure_gasses

Another thing I learnt is that a solid can turn into a gas. That change is called sublimation.

2 understandings I now have:

I now understand that it is possible to go from a solid to a gas without going through the step of melting. I understand that that process is called sublimation. I first found sublimation quite weird and didn’t think it was possible but I found a example which explained everything: Dry Ice. Dry Ice does not melt when it is left in the sun, it turns into a gas.

sublimation

Another understanding I know have is that scientists don’t use all 5 senses in the science lab. In the science lab you look to observe somethings like : color change, size change, shape change, ect. You use your ears to hear bubbling or loud noises or nothing at all. You use hands to feel if something has gone from smooth to rough or vice-verse. And you use your nose to waft of a potion or something similar. You don’t taste anything in case there are dangerous chemicals in it or such.

1 question I still have:

I would like to know if fish would be able to survive on the moon? I would like to know this because I believe there is hydrogen in outer space and in H2O there is Hydrogen and oxygen but we all know fish can’t breathe in oxygen. So I started to wonder weather they would be able to live in outer space and I would like to find out in the future.

fish on the moon

What were the most important things I learnt were:

I think the most important things I learnt were the names of the changing state processes.(Melting, Freezing, Evaporation, Condensation and Sublimation) I believe these will help me throughout life so I can explain the changes of state I observe. This will help me in my P.O.E charts so I can have a good explanation at the end.

How did I learn it: 

I learnt them  by listening to the scientists from GTAC explain it to me and to see how they all worked. I found out that when you make pop-corn the kernel evaporates because the inside of the kernel is water. So when the kernel gets hot the water inside starts to boil until finally there is so much gas inside the kernel that it has to pop.

popcorn-kernels-524096

What am I going to do with what I learnt:

I am going to use this information in the future because I dream of becoming a scientist for GTAC. This is a dream because I quite enjoyed our science unit and would like to do more of it in the future.

Special thanks to:

I would like to say thanks to GTAC for sending us Maria, Jacinta and Chris to teach us about the 4 states of matter and changing state.

G-TAC

 

If you would like to visit GTAC’S site here is the link:

http://www.gtac.edu.au/site/home.html

 

 

 

GTAC lesson 5

On Tuesday the 12 of June Moonee Ponds Primary school had there 5th and final visit from Chris and Maria whom are 2 scientists from GTAC.

3 facts I have learnt are:

The definition of Independent variable, the condition that is changed by the scientist. The definition of dependent variable, what you measure in response to the independent variable and the definition of controlled variable, conditions that are kept the same throughout the experiment.

2 understandings I now have:

I now understand that different things make substances dissolve quicker than others. Like a tablet dissolves better in hot water and not as well in cold water. I understand the difference between all the types of variables.

1 question I still have:

Why does rust form better in different substances?

Thank you to GTAC for sending us Chris, Maria and Jacinta to teach us about chemistry.

GTAC lesson 4 reflection

G-TACOn the 4th of June GTAC scientists, Chris and Jacinta  came into our school to give the year 5/6’s there 4th lesson.

3 facts I learn’t were:

The meaning if irreversible change, a change that can be undone and you can get the original substance back. I learn’t that some changes are reversible but in a complicated way like evaporation. And I learn’t how reversible change is used in science.

2 understandings I now have are:

I now understand why we use reversible change in science, its because its important that we are some times get the original substance back. I also learn’t that some things I thought were irreversible ended up being reversible.

1 question I still have:

Are there any other state changes that are used in reversible change? (other than evaporation.)

http://www.gtac.edu.au/site/home.html

GTAC lesson 3

On Monday the 26t of May Moonee Ponds Primary School’s year 5/6’s had their 3rd lesson with GTAC. Chris and Maria helped us with the ‘Mixing Substances.’

3 facts I remember are that H2O is the atoms in water and it stands for 2 Hydrogen, Oxygen. Ethane is 2 carbon atoms and 6 hydrogen atoms. Ethanol is 2 carbon atoms 1 oxygen atoms and 7 hydrogen atoms.

2 things I understand are that ethane does not dissolve in water. Salt is made out of chlorine atoms and sodium atoms and also dissolves.

1 question I still have is why doesn’t hydrogen not merge with more hydrogen?

GTAC lesson 2

It was Wednesday to 14th of May when Moonee Ponds Primary School’s year 5/6’s had their 2nd  visit from GTAC. (Gene Technology Accesses Centre). Chris and Jacinta taught us lots about the gas state.

We did a activity and then took notes in our P.O.E (Predict, Observe, Explain) chart. The activity we did was get a jug full of water and put a ping pong ball inside. Then we had to put a plastic cup on top of the ball and push down.

Today I learnt how liquid and gas partials don’t mix well and how water partials give way to gas partials. When we pushed the cup down all the water moved, so there was no water in the cup and the ball fell to the bottom of the jug.

I now understand that the partials in the gas state don’t mix with the partials in the liquid state. I also understand that gas partials speed up when there warm and slow down when they are cold.

I still want to know why some gases are deadly and others aren’t?   SAM_3269

Education week ‘Scientists do amazing things’

On Wednesday the 21st of May 5/6B had their 1st visit to G-TAC. (Gene technology accesses centre.) We decided to go today to represent education week. The theme was ‘scientist do amazing things’. When we arrived there were many wonderful scientists  ready to teach us about ‘ Changing State’.  We slipped on our lab coats and got ready to work.

Some of the facts I found interesting were that changing from a gas to a liquid is called condensation. I found out that there is water inside a popcorn carnal so that when it is put over heat the water boils and evaporates and that makes the popcorn BURST! Another fact we learned is that water (a liquid) is not always as clean as it seems. We looked at water samples under a stereo ( microscope with 2 lenses) microscope. There were all sorts of bugs in our water.

I now understand that not all bacteria is bad for you, it all depends on where the bacteria is. There is a bacteria in your stomach that helps you digest food and it is good for you there but if we eat it things won’t turn out great. I also understand that there is 5 different ways to change state. These 5 ways are melting, evaporation, condensation, freezing and sublimation.

I still wonder what will happen if liquid nitrogen came in contact with the sun? Will it boil and evaporate? Or will the sun freeze?      G-TAC

G-TAC reflection

It was Tuesday the 6th of May when Moonee Ponds Primary School had their 1st visit from two G-TAC scientists in the science lab. Chris and Maria taught us about how solids and liquids behave differently.

We did lots of different activities to explore how the atoms, molecules and partials worked. The first activity we did, we had to put play dough in a bottomless cup and take it to the other side of the room using tongs! In the 2nd activity we had to take a rubber band to the other side of the room with a cup, but it was not allowed to sit in the cup or on the bottom of the cup and in the 3rd  challenge we had to put most of the partials of a foam cup into a plastic cup and take it to the other side of the room.

Today I learnt about the particles in solids and liquids and how different they are.  I learnt about  why they are tightly packet or how loosely packet. I learnt about how some liquids are stickier than others.

I now understand that the particles in a solid very attracted to each-other and that’s why they are always together. I also understand that the particles in a liquid are still attracted to one anther but there not as fond of each other so they stop shake hands and move on. But in a solid they are with each-other all the time.

I still have 4 questions though. Like if in a rubber band the atoms are tightly packet because it’s a solid but how does it stretch? Is heat a plasma like the sun? do all solids have the same percentage of atoms? How many different types of atoms are there?     DSC_0013