During science we did a pH test on the things we use (milk, lemon,etc.) to see how acidic or basic the liquid is. I learned that milk is a bit more base than acidic and I also learned that Lemon or any citrus is very high in acid. Knowing this for something to be neutral it has to be a 7 which would be pure water.
For Science we had to do a element's project to see what we learned about elements. I had Calcium and I learned that Calcium has 20 protons and electrons(it also has 4 rings) with 20 neutrons. I also learned it's discover was Humphry Davy.
The Periodic Table was a table made for scientists to help them identify things. I learned that to read a periodic table you read it by left to right, also its organized in groups and families. I also I learned that the periodic table was so big that they separated the bottom row and put it lower for space.
During science our class created a timeline of the events of the atom. I learned which scientists discovered certain parts of the atom and I also learned some of the scientists were proved wrong. To create this timeline we had to use our textbooks to figure out which events went first. But then our teacher taught us that Bohr said electrons can travel in certain paths.
In Science we did a example of a mixture. I learned that a mixture is not chemically combined since it is reversible. So our teacher did mixture of popcorn with skittles,Cheerios,and m'ms. Once she mixed them we each got a sample, and separated the mixture. Since we could separate the mixture this was a physical which not a chemical change.
During class our teacher wanted us to understand carbon dioxide better by doing a experiment with dry ice. I learned that dry ice skips the liquid stage and does from a solid directly to a liquid. We examined the dry ice by using our pencils to poke at it since dry ice is really cold that it can burn your skin. Then we added it in water and it bubbled up and turned into gas. This process was sublimation. I had a lot of fun and learned a whole bunch of new things.
In science we gathered into our groups and did 7 experiments together. The point of the lab is to figure out which experiments where a chemical (creates a new substance) change, a physical change(a substance that doesn't change), or both. Then explain why you chose that change. The first item our group came across was the tums. We were suppose to grind the tums and then define which change it was. Our group said it was a physical change since the tums were just grinned,there was no new substance, and that it can be reversed since all you need to do is melt the grinned tums together. The 2nd experiment was to pour one spoon of sugar into water and stir. Our group said that it was a physical change even though it cant be reversed since the sugar dissolved in the water. The 3rd experiment was to watch the ice. Our group said it was a physical change since the melted ice could change back into a solid ice by freezing it. The 4th experiment was to put steel wool into water and watched, we claimed it was a chemical change since the water's color changed and it started to rust. The 5th experiment was to combine baking soda and vinegar together, Our group said it was definitely a chemical change since the vinegar started to bubble and created a gas. The 6th experiment was to cut an apple into pieces and watch it turn brown. Our group claimed it was both physical change and chemical change since cutting the apple didn't change or create a new substance and it was a chemical change since the apple changed color. The last experiment that we did was to put clay on a candle and light it for 2 min. Our group said it was a physical change since you can freeze the melting wax and it will change back into a solid candle.
During science we did an seed experiment to see how germination works. So we chose 4 seeds (2 different kind) then put 2 of each seed into 2 bags. One of the bags had a wet paper towel and one had a dry paper towel. Then we made observations to see if the seeds changed after a few days. Our hypothesis was to see if water causes germination. So what we were looking for was to see a growth difference in the wet bag and the dry bag to see if water was required. The seeds in the wet bag had grown into a stem after a few days, but the seeds with no water had not changed at all. So our hypothesis was correct water is required for germination.
In science class we did an experiment with mixing colors. We went into our lab groups and got each an instruction paper. We then in our groups we had to measure and mix colors. It turns out they all went in rainbow order.After we measured the volume we then recorded it in a data table. The experiment was really fun even though we had a little trouble with trying to measure the exact measurement without going over the limit,overall it was really fun. The point of the experiment was to see if we can measure correctly. And I learned that if you measured wrong the color may change or wont have enough room for the other color to mix it with.
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