Last Friday, we were walking to the STEM lab for our usual time with our class. We were really excited to see Ms. Sar, our STEM teacher, and she was really excited to see us. When we stopped at the door she gave us a pencil and told us where to sit and at what table. When we walked in she told us what we were going to work on so we got the paper that was on the table and we started filling it out with Ms. Sar’s directions.
The Next Steps
When Ms. Sar helped us we started talking about what we were going to do with the paper and what the next steps were going to be. She started talking about an egg that has been in vinegar for a week and told us how it represented a cell membrane. A cell membrane is the skin of a cell and how it only let’s certain materials in and certain materials out. Quickly we passed the egg around to see how the shell of the egg was defusing because the vinegar. After that we started working with our table groups and we were talking about what we were going to to do next.
A Quick Review
When we were talking to our table groups Ms.Sar brought our attention back to her and made a quick review about what a cell has. First we talked about a nucleus. A nucleus is like the brain of cell. Then we talked about a cytoplasm. We talked about how cytoplasm is a gel like substance. Then we moved on to a vacuole. A vacuole stores all the water, food, and waste. It can also tell the nucleus when to release all the water, food, and waste. We also learned about a cell membrane. A cell membrane is the skin of a cell and it helps keep the structure of a cell and only let’s certain materials in and certain materials out. A last part of a cell we learned about was the mitochondria. We learned about how the mitochondria breaks down food and turns it into energy or stores the energy.
Time To Start
After Ms. Sar reviewed about the cells she told us it was time to start the experiment but first she made us turn the back of the paper to see what we were going to do first, second, and third. Then she let us start on our experiment. First we had corn starch, water, iodine, and a bag. First, we had to put cornstarch and water in the bag and smash it together. Next we let the bag sit in the iodine for 10 minutes. While we did that we watched a BrainPop and it was talking about cells and the cell wall. We finished BrainPop and the 10 minutes had already passed so we checked on the bag and it had a purplish stripe on it. Ms.Sar asked why we thought it had purplish spots on it? We had to answer that question as a group. As soon as we knew it it was time for lunch and so we left for lunch. We can’t wait to go back next week so we can continue to learn about cells and how they are being affected by cancer just like in our classmate Jonathan’s body!