These were my science goals for this term:
Changes to materials can be reversible, such as melting, freezing, evaporating; Or irreversible, such as burning and rusting.
Decide which variable should be changed and measured in fair tests and accurately observe, measure and record data, using digital technologies as appropriate.
Construct and use a range of representations, including tables and graphs, to represent and describe observations, patterns or relationships in data using digital technologies as appropriate.
Use strategies to help me read and understand scientific texts that use tier 3 scientific language.
Create scientific explanations and lab reports that follow a conventional outline and that clearly communicate my understanding.
This term our topic was chemistry (science). We learnt about the main 3 states of matter (solid, liquid and gas).
- A solid is one of the main 3 states of matter. Its properties are that it has a defiant shape, it’s hard and it’s visible. Also, its particles are compact (liquids and gases don’t have compact particles because they don’t have a shape. Their particles vibrate and are in groups).
- A liquid is another main state of matter.
- A gas is the last main state of matter. Some of its properties are that’s its invisible, it doesn’t have a definite shape and it takes up all the space around us. The particles in gas bounce around and move at high speed. Also, the particles move around in a single direction until they hit another particle/object in the way (which results to the particle changing its course of direction).
There are also 2 other states of matter, plasma and Bose Einstein Condensate. We didn’t learn that much about them, but I can say that Bose Einstein Condensate was predicted by Albert Einstein and Satyendra Nath Bose (a physicist), and is when you cool down a temperature of an object to near absolute zero. And plasma is like a gas with a lot more energy added to it.
We learnt about how the 3 states of matter change state. When you change a solid to a liquid, you reduce heat/melt it to its melting point (so it can change to a liquid). When you change a solid to a gas, it’s called sublimation (when you change a solid to a gas without going through the liquid state of matter). Therefore, deposition is when a gas goes to a solid without going through the liquid state of matter. Then there’s gas to a liquid which is condensation (reduction in heat), and liquid to a gas (which is evaporation/vaporisation/boiling). Now there’s only one left, liquid to a solid. That change in state is called solidification/freezing (reduce heat).
We learnt about reversible and irreversible changes (melting and freezing are reversible, burning and rusting are irreversible), and how all the ways that the 3 states of matter changes are reversible. We found out about properties of solids (hard, visible, has its own shape), liquids (can be poured, changes shape, visible) and gases (invisible, fills the room, has no definite shape).
There was knowledge about physical and chemical changes, and how chemical changes are mostly irreversible (and that physical changes are reversible). We also learnt about the ways that you can tell when a chemical change has occurred:
A change in odour, a change in colour, a new substance is created, a different texture has been formed, taking in energy- heat has occurred, a formation or deconstruction of a substance happened and finally, if reduced energy- heat/light/sound happened.
And, we learnt the signs for a physical change:
- Boiling and Dissolving
The last thing we learnt about in this unit was atoms, molecules and particles. A molecule is made up of atoms. An atom is made up of protons, neutrons and electrons, which are technically in molecules to (since atoms make up molecules). When heat is applied to molecules, they spread out to create a gas. But when heat is reduced, the molecules squeeze together to create a solid or liquid.
Particles are in solids, liquids and gases. In liquids, the particles move around freely- they have weak bonds that keeps them close together (they slice past each other when they move). In gas, the particles bounce around and move at a high speed. The particles move in one direction until they hit another particle/object in the way, which then makes the particle change direction. And finally a solid, the particles in it vibrate but do not move past each other (they vibrate in groups and are compact).
What I have achieved:
During this semester, I believe I have achieved a good understanding on this unit and have achieved my goals. And, throughout the unit I have learnt a lot and understood all of the knowledge. If you don’t believe me, my biggest evidence is my introduction (which is based on a summary of the knowledge we got from this unit). It recalls the definitions of the 3 main states of matter (and the other 2 states of matter-though we didn’t learn about them a lot), how they change state (melting, freezing, evaporation etc.), the properties the 3 states of matter have, chemical and physical changes (and the signs they show), reversible or irreversible changes (includes how physical and chemical changes connect to it) and finally molecules, atoms and particles.
So, I believe I have achieved understanding my unit of work and receiving the knowledge that was given to me very well. As for my goals…
I feel that I have achieved my goals for this unit and have plenty of evidence why.
My first goal outlines if changes to materials can be reversible or irreversible, and has some examples of changes of states that are reversible or irreversible (melting, freezing, evaporation- reversible or burning and rusting- irreversible). To prove I achieved this goal, I can tell you that all the changes of state are reversible to a material. This is because of the simple fact that solids, liquids and gases can convert into each other, they can change state by the changes of state (freezing, melting, sublimation etc.).
My second goal summarized if I could decide which variable could change (and be measured) in fair test and precisely observe, measure and take data- using digital technologies when needed.
If you didn’t know, to prove that we understood the unit, our class (in partners) had to do a science experiment about our main goal (for our year level). The main goal for my grade was the 1st goal about reversible or irreversible changes, and my experiment was about which type of material was the most reversible and beneficial when recycling paper. I had to choose our variables and what I could do with them/what I could change.
At the start I decided the variables would be 3 plates, the same amount of water (100 ml) and 3 bowls. It turned out that one of our variables (3 plates) changed to 3 sieves. In the end, I observed and took data on what happened throughout the experiment and used digital technology when I needed it (timers). So, I think that I have achieved my goal very well, and my evidence is physically doing it.
My 3rd goal was to make and use a range of different representations to show and describe your data/observations or/and patterns or relationships in your data. There was also using digital technologies as appropriate and that you should include (as a representations) a graph or a table. In my science experiment, I had written up a science lab report which included a table and some pictures (which count as a representation). And, the pictures were taken by camera and I used Word Document to create the table. So, I used a range of different representations (table and pictures) to show and describe your data/observations, and I used digital technologies as appropriate (camera and computer). Which means that I have achieved my goal well.
My 4th goal was to use strategies to help me read and understand scientific texts that use tier 3 scientific language. This is one of the goals I thought would be the hardest to achieve, but it ended up being one of the easiest. This is because I needed to read and understand a lot of websites with tier 3 language so I could explain the science behind my experiment (for the discussion in my science lab report). The strategies I used were:
- Guess and Check- replace words with what you think they are and see if they make sense in the context
- Use a dictionary- with the words you don’t know, search them up
- Go onto websites for kids- check if they have the same stuff and see whether it’s explained better on the website for kids- but find out the tier 3 language on the other website as well.
So, I sense that I have achieved my goal very well for I used a variety of different strategies to help me read and understand scientific texts that include tier 3 language.
My 5th and final goal: I can create scientific explanations and lab reports that follow a conventional outline and that clearly communicate my understanding. This goal is one of the goals I believe I nailed when looking over it. This is because, when I finished writing up my lab report, I made sure that all the tier 3 words were explained (so it could be easily understood and it would communicate my understanding). Also, I made sure that I had put in the essential features of my experiment in my lab report, to make sure it was purely based on my science experiment. Which concludes me to why I’m sure that I have achieved this goal.
In total, I have achieved all my goals as well as understanding and remembering all the knowledge that was given to me.
Ways I Can Improve:
Something I could have improved in this unit was my presentation for my experiment. I believe it wasn’t as good as it could have been, and there were some facts that could’ve been explained better (if I had chosen to expand on it). Also, if I had more facts on my PowerPoint it might have been better for the audience so they could see what we were talking about (and it could have been more engaging).
I could have also taken my observations a bit more effectively. Instead of doing every 5 minutes, I could have done every 10 or 20mins. Or I could have only include the 10-20mins in my lab report, rather than putting in some times that only a little bit happened (some of the 5min times were like that).
What I learnt About Science:
I learnt that when you do anything in science, you have to be extra careful. This is because you can ruin an experiment by the simplest of things, and there’s no short list to how many things can go wrong. You could forget something on the day, you might have the wrong equipment, and you might forget to record a piece of data! It can even include things like forgetting how much water you put in a glass for an experiment. It’s that easy to do make a mistake. Which is why scientist have to be very careful and very precise.
You need to be precise because you want to get the correct measurements and observations, so your experiment is correct and then you can show what actually happens. If you’re not exact, you will have to start all over again and double check everything (so you can get the exact result).
What I learnt about the way that I work:
I learnt that when I work, I always have to finish it in a certain time limit. I always end up trying to finish something by the end of class because I had gambled on in the first part. Which brings me to how I’ve learnt that I gamble on in my work. This has always been a thing I have to work on, but in this unit I have really noticed it. One example of this habit is this reflection! So, what I have learnt about my work habits is I always have to finish at a certain time and that I gamble on in my work (the 2nd habit is harder for me).
Goals in my report:
This unit has helped me with 2 of my goals for my semester: improving on thinking about thinking and speaking slower so people can understand me. For my discussion in my science lab report, I had to keep asking myself “Why does this happen?” to get myself deeper into the science. And since I was thinking about my thinking, it helped me get better at this goal.
Also, at the end of the term we had to do a presentation in front of the class. And I made sure that I was speaking at a reasonable speed and that everyone could understand me. Since I was practising that, I was practising my goal at the same time.