Working with density
What is density? Some people say that density is whether something sinks or floats. This is not true. What really determines if something is going to sink or float is if the object is more or less dense than the water. Just because something is hollow does not mean it will float. Boats are hollow. You might say, “Oh, the boat had a big hole in it and that was why the boat sank.” This is not true. The water came in through that hole and filled up the boat. The boat became denser and denser until it sank. Below are the densities of water, a marble, and an aircraft carrier.
We had a challenge assigned by King Arthur. Somebody stole his solid gold crown. It was brought back by one of his knights. But four other knights brought back identical crowns. Our job was to discover who brought the right crown, which the right crown was, and why. Here is the link to the letter to which I have written him explaining the details. But we needed to find the density of each crown to determine which one was gold.
Then we were talking about elements, the such on the periodic table.
Elements are substances that are made up of only one type of atom. If the element is not on the periodic table, it is not an element. Elements are the building blocks of all matter. The periodic table lists ALL of the elements. The atomic number of an element is the number of protons the atom has. The element symbol had one uppercase letter, sometimes one other lowercase letter, and ZERO numbers. The atomic mass of the atom is the number of protons plus the number of neutrons in an atoms. Ions (aye-ons) are atoms that have LOST or GAINED electrons. If they lose electrons, they are positive (cations,because cats have paws!🐾), and if they have gained electrons, they are anions, negative ions. The charge is the protons minus the electrons.
S&EP:SP5: Working with math
This week, we had to use math to find the densities of the crowns and other objects we were discussing. We used simple division, but still, we used it.
XCC: Scale, Proportion, and Quantity
Math is affected by this. If you do not do the math correctly, you will not have the right answer. If you do not have the right answer, then you could have bad results. If you were launching a rocket, and you got the proportions wrong, you would fail miserably.
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