STEM round 5

Picture A
Picture B

“The teen playing tennis in Figure below is having fun. The other teen in the same figure is working hard studying for an exam. You can tell by their faces which teen is doing work — or can you? Would it surprise you to learn that the teen who is working is the one who is having fun playing tennis, while the teen who is studying isn’t doing any work at all? The reason why has to do with how work is defined in physics.” Ck – 12 (Chapter 16.1)

Well, It’s amazed me as much as it does to you. According to Google, work means an activity involving mental or physical effort done in order to achieve a purpose or result. However, In physic, according to Ck-12 Work means, work means the use of force to move an object. So the girl in the picture a is working and girl in picture b is not working because she does not apply any force. ( in physic)

STEM Round 4

In this round, we focus on motion and force. We are learning thing that we don’t really think about. One of my highlights is making a balloon-powered car. I teamed up with one of my classmates in order to make it. We built it with one bottle, two sticks, 4 water bottle caps, 1 or 2 straw, 1 balloon, glue gun, and a scissor. Here are steps by steps to make a balloon-powered car:

  1. First, lay the water down. Make a hole on the side of your water bottle, it should be big enough for a straw to go through.
  2. Then make another hole in the middle of the bottom of your water bottle, it also should be big enough for a straw to go through.
  3. Now leave that bottle with two holes away, then cut one plastic straw into two. *Make sure that those straw is going to be shorter than your sticks.
  4. Put the straws into each stick.
  5. Now glue the water bottle caps on the end of the sticks. Apply the same thing to the other three edges of the sticks.
  6. After, attach the two straw to the body of your car (water bottle) by using a glue gun. *Make sure that they are equal because you don’t want your car to be askew and end up with going in the wrong direction from what you want*
  7. Now put the balloon through the top hole to the bottom hole on the body of your car.
  8. Then glue the balloon to the end of the straw. * Make sure that you can blow through the straw to the balloon.
  9. Finally, test your balloon powered car. Now you have a balloon powered car.


With the help of a balloon powered car, it was really helpful for us to understand the content.

STEM Round 3

In the 3rd round, we are learning by doing experiments. Our facilitator, Da planed out the week like this, on Monday is the day that we start the new lesson, we also can list down some questions for Tuesday. On Tuesday we discuss our question that we have listed down. On Thursday we experiment to know more about the topics. On Friday we celebrate our knowledge, which is a quiz of the week. One of my favorite experiment is the black snake experiment. This experiment explained everything even though I was on trips for the rest of the week. We need 5 gram of banking soda, 20 gram of sugar, a bowl of sand, lighter fluid, lighter, bowl, and aluminate wrap. Here is the instruction:

  1. First, add 5 gram of banking soda to 20 gram.
  2. Then mix the banking soda and sugar until they mixed well.
  3. Wrap the bowl with aluminate wrap
  4. Place sand in the bowl
  5. Then pour lighter fluid into the bowl sand until the whole bowl of sand wet well.
  6. Put the mixture of soda and sugar in the middle of the sand bowl
  7. Light up the sand
  8. Let the black snake continue it journey

*note: If you want to extinguish the light, pour some water in.

I think it is marvelous and well explain the whole idea of the lesson. Hopefully, we can do more experiment like this.


STEM Round 2

Chemical bonding was the main focusing for this round. As we went along, we found out that there are three types of chemical bondings which are Covalent bonding, Ionic bonding, and metallic bonding. Covalent bonding is a type of bonding that nonmetal element shares electron to another nonmetal electron to be stable. For an example, Carbon dioxide. Ionic bonding is a bonding that metal element transfer their electron to nonmetal electron. Sodium Chloride is one of the examples. Sodium with 11 electrons and chloride with 17 electrons. In order to be stable Sodium need to lose one electron and Chloride need to gain one electron to be stable. Sodium donates one electron to Chloride then Sodium becomes positive and Chloride becomes negative after it gains one more electron. Metallic bonding is a force attraction between a positive metal ion and valence electron, it shares with an ion with other metal. Chemical bonding is so important, and if we don’t have chemical bonding we would not have different type of matters. I was really amazed to element world after learning chemical bonding because I did not know that they are able to share and transfer their electron to another element. Ohh! Kind element.

STEM Round 1

The third year at Liger, we don’t have STEM class every week, since this class needs to share with Multimedia/Technology. The theme that we focus in STEM class the first round was Physic. We started the first week with the introduction to physic and matter. It seemed so brand new thing to me. However, I was still excited to learn and explore more about it. I was reading and do a lot of research about the lesson to help me understand more about the topic. In the second week, we were digging farther about matter. We also started to learn more about atom, which one of the constituents that made matter. The only fun fact about me in STEM class, the more I learn, the more I wonder.