STEM

 

In STEM this term we have new things, a lot of things good and exciting learning time in STEM. We got a new schedule for stem which is Monday is reading and Tuesday is the experiment and of course, Tuesday is my favorite. The lessons we have learned are Acid and Base, Movement and we got to do experiments too. Acid and base are my favorite one overall because it is new to me and also I feel like I really got it. Sometimes I feel like I am not learning, but instead, I am taking it in step by step by just observing. I feel so natural like I don’t have to push myself so hard, but I get it more than I usually does. One more thing that I noticed myself in STEM class is that we just changed group and times so I feel like after the changing things happen I feel like I got to understand STEM better and also I feel like I like STEM now. Acid and base is the started of me where I started to like STEM even though to some people like me before I think that STEM is a really long process and there are so many things and vocabulary to learn,but when you got to understand it and when you learned it in different ways you will feel like you are not learning by just sitting class and read or listen to your teacher, but it about the discussing in team and using it in everyday life. One tip that I always did to remember about STEM things is that I keep it in real life. I try to look at the real-life example and also trying to making jokes or sentences or speaking with my friends about it so that it will always be in my head and I won’t forget it after we learned. For acid and base experiment this is what we did and what had happened:

Acid and Base test

Students will put into three groups for this experiment.

Material:

Cups

Red carbage solution as an indicator

  1. Lemon juice 2. Vinegar 3. Sprite  4. Water
  2. Toothpaste and water solution 6. Baking soda and water solution  7. Bleach.

Step 1

Add 20 ml of each solution to an each cup

This is what they turned to be

Pour indicator solution to each solution cup

Vinegar =pink

Baking soda and water solution=green

water=light purple

sprite=pink

Lemon juice=pink 

Bleach=still

Toothpaste and water solution=purple ( Take note of the color change in every cups )

For more information about the experiment here is my lab report

First, we grab each of the material and poured those things above step by step then we mixed it with the indicator cup by cup.

For lemon juice, Vinegar, Sprite it turns in to pink because those are acidic. For water and toothpaste, they turned into purple or light purple because they are the neutral which is 7, not an acid or a base. For bleach and baking soda are a base because for the baking soda it turned into green while bleach doesn’t even change color at all. When we take Lemon juice cup ( already mixed with indicator) and Pour it in the bleach cup the reaction still the same which it turned to the bleach colors like we didn’t add anything. Then we take baking soda and water solution and pour it in the vinegar and It was a really high reaction because the bubble was coming up nearly to the top of the cup, and it turns in to purple which it turned into neutral. The last thing we did was we take Sprite and pour slowly into the toothpaste solution and it becomes pink which is the acid.

 

This is the first time I even have done anything like this. I always wanted to do it because I like to see what going to change. This is actually fun, but before the fun coming I was a mess. In our team, we messed it up about 3-4 times because we didn’t read the instruction properly, but that the lesson I learned at the same time with the Acid and base. I was really stressful actually when we messed up things got more and more complicated to me while when we have done it we feel it is an easy experiment we just have to do it exactly as step by step from the instruction. This is the one that we get right for the first time and also Alli (our teacher)is with us all the time for this one. I really feel sorry to her because we messed up a lot and if I was her I will be really annoying because we have done the same mistakes over and over, but that called experiment if we didn’t get it wrong we won’t remember it in the future. For me after these mistakes, I won’t forget about this lesson and also the experiences I have for today.

Here are some of the acid scale and reactions:

 

(credits: Shutterstock )

Stem

  We have learned a lot of new things in stem especially, we learned about the periodic table and  Chemical Bonding. In class, we also did experiment too. Chemical bonding is a lot to understand. Ionic bonds, covalent bonds metallic bonds these are the things that we learned.  Those bonding if I haven’t learned I will never know that it can affect that much. Element share electrons in condition to be stable. Ionic bonding is when element gives away the electron to another element. Covalent bonding is when element share electrons together.  

 This is called the periodic table.

This is the covalent bonding.

And this is called the Ionic bonding.

STEM

For this round in stem essential, I had learned a lot of things that I never knew before. The most things that we talked a lot in class is about physical science and we also learned about atom which there are a lot of things in the atom that I never know before and from this lesson I got to know many facts and new thing too. Atom is inside of everything around you and I think that I have learned about it so that a great thing to learn because of it everywhere and you have to know about it. It is not that really hard to learn in STEM class, but it is just that I have to take most of my time doing extra work by myself in this class when I am free because STEM can be easy if you understand and read and practice more with them. Everything right now is using STEN in order for us to change Cambodia we have to learn all of this basic first so we can get to the bigger step in the future.