Welcome back to the unofficial second half of the year! I call it unofficial since the second quarter really doesn't end until the 20th of this month. Also, we are entering the time of the school year where there is a longer stretch without a significant break. However, this year's spring break will come earlier (end of March) and will last a bit longer.
Wednesday the 20th is also the second early release day of the year. I will have more information on that as we get closer to that day.
We began with a change in the schedule. As I had mentioned earlier, the district's big push this year is literacy since it truly is the foundation for all learning. In my class, the first 30 minutes of Monday, Wednesday, and Friday will be devoted to literacy. This will be on a normal week. On weeks where students are not in session on any of those days, they will be made up on a Tuesday or Thursday.
Today we began the second part of the energy unit and our focus has shifted to light. We cover three of its main properties. There are more than three but the three we are covering involves the way light energy behaves after is encounters an object.
Light emanates outward from its source in all directions. It travels in a straight path indefinitely unless it encounters an obstruction. When it does that, at least three things can happen depending on the object's composition:
We also went into greater detail about each property. Below are the notes though they can also be downloaded here.
Light can be reflected, refracted, and absorbed
Reflection – light bounces back with the same amount of energy that first hits the surface such as a mirror. Images appear to look backwards.
The Law of Reflection – light reflects at the exact same angle it came from.
Refraction – light changes direction or bent. It causes objects to look bent, broken ,larger, or smaller (telescope and microscope)
Diffraction – light is split into its seven separate colors by passing through a prism
Spectrum – the seven colors that make up white light (red, orange, yellow, green, blue, indigo, violet)
Absorption – all of the energy of light is captured and transferred to the matter that captures it
White is the color that best reflects light. When something is white, it means that all of the colors are reflected back
Black is the color of absorption. When something is black, it means that all of the colors have been absorbed
A shadow is simply the result of light being blocked and absorbed
Light spreads out from its source in all directions and travels in a straight path unless it is interrupted
I also demonstrated some of the concepts covered: