What I Learned In School This Year
By: Onyx Deutsch
I am in sixth grade this year and these are some of the things I’ve learned:
This year I learned better how to add, subtract, multiply and divide fractions.
If you are adding or subtracting you find the LCD ( least common denominator) which is where you find the smallest number that both denominators go into evenly.
Adding: First you have to find the LCD then you add the numerators of both fractions and if the denominators are the same then you leave it as it is.
Subtracting: once again you find the LCD then you subtract the numerators and leave the denominators the same.
Multiplying: I think this is the easiest one of them all. All you do is multiply the numerators and the denominators by the other one.
Dividing: what you do to use the reciprocal on the second fraction and then multiply straight across.
Reciprocal: all you do is switch the denominator to the numerator.
Improper: you find how many times the denominator goes into the numerator. How many times it goes into the numerator is the whole number in the mixed number. And what is left over is the numerator and your first number is the denominator.
We learned about the pony express and how they wanted skinny small boys to ride across part of america to deliver mail. They would ride for one hour on one horse then switch to another horse and keep riding.then that boy would switch and give the mail to another boy.
Eli Whitney invented the cotton gin. What it did was it separated the cotton from the seeds. This really helped slaves because they didn’t have to do it by hand. But when he showed people his invention everyone easily copied his idea and so he did not make any money.
When Thomas Jefferson bought the Louisiana purchase from France he sent out two explorers ( and 90 men) to explore their new territory. On the way they met many tribes and in one a girl said she would lead them. Her name was Sacagewea and when she was leading them through the new territory she was carrying a baby on her back.
We learned about how robots are being used to milk cows so people do not have to milk them by hand. On some the cows walk in when they are ready. They had tags in their ears so when they walk in the computer detects their tags and prepare to milk them. And the computer strains and bottles the milk.
We also learned about microwaves and how they use a magnetron to produce microwaves that cook food on minutes. Microwaves are are very short radio waves and if they were to escape the oven it could be fatal to people. That is why the microwave does not work unless the door is tightly sealed. There is a fine layer of mesh between the pieces of glass that blocks most of the microwaves. Microwaves only heat the food they do not heat plastic or glass. But if you were to put a spoon in the microwave it would spark. The difference between a microwave oven and a conventional oven is the air in a regular oven gets hot and dry and so the food gets crispy and dry like breads and pastries do. But in a microwave oven the air does not get hot so food does not get crispy.
I hope you have enjoyed reading some of what I have learned!