# Evidence of Work

## Modeling Process

Our first model was a representation of our knowledge of the Solar System based on prior knowledge. We would later see that our prior knowledge of the Solar system was vastly inaccurate. In Model 2, we were told to use an accurate piece of relevancy to make the solar system proportional in distance. In Model 3, used another piece of proportionality to make a final image of the Solar System. We used size of planets with the distance between planets to make our final product.

Then came the second part of the project, we were given information on Planet X and told to find the gravity. What we did to solve this was put in all of the planets we previously knew into a graph where the independent variable was gravity and the dependent variable was mass of planet. We then made a line of best fit according to these points because we say an exponential relationship. The equation we formulated was m = (8.1393 * 10^(-47))(1500)^Ag. We were vastly wrong with this equation. We got a negative gravity which is unknown to the universe.

The final step of the project was to use the actual equations to solve and explain steps based on the Earth, Planet X, and Planet Y.

# Content

## Learning Targets

Gravitational force equation : F=G*m1*m2 /d^2

Modeling Earth’s interior and surface movement by describing the cycling of matter by thermal convection.

To be able to predict the orbit of an object in the solar system.

## Terms

Density : Degree of consistency measured by the quantity of mass per unit volume.

Crust : The outermost layer of Earth (the surface) composed of a variety of different substances, one including silicon. It is the thinnest layer of the Earth.

Mantle : The mantle sits right below Earth and is the thickest layer. The mantle is where convection occurs, and it is made up of rock that moves like a fluid.

Liquid Outer Core : The outer core is the second to last layer of the Earth. It is a magma-like liquid layer that surrounds the Inner Core and creates Earth's magnetic field.

Solid Inner Core : The Earth's innermost layer. It is primarily a solid ball made up of iron-nickel alloy and other elements.

Convection : The process of hot material rising from the interior of a planet, which rises because it is less dense than the cooler material around it. As it gets close to the surface, the material cools and descends back toward the center, which repeats.

Orbital Period : The time it takes to complete one full orbit/rotation around the sun (or another body of mass).

Orbital Velocity : Velocity sufficient to cause a natural or artificial satellite to remain in orbit (how fast a body of mass moves around another body of mass).

Rotation : The spin of a planet on its axis or center (internally).

Revolution : When an object circles an external object.

Universal Law of Gravitation : Every particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Inverse Square Law : The intensity of an effect such as illumination or gravitational force changes in inverse proportion to the square of the distance from the source.

Magnetic Field : A vector field that describes the magnetic influence of electrical currents and magnetized materials.

Radioactive Decay : The spontaneous transformation of an unstable atomic nucleus into a lighter one, in which radiation is released in the form of alpha particles, beta particles, gamma rays, and other particles.

Gravitational Constant : The constant in Newton's law of gravitation and Albert Einstein's general theory of relativity relating gravity to the masses and separation of particles. This constant is 6.67 x 10^(-11) Nm²/Kg².

# Reflection

The intergalactic planetary project really opened my eyes up to how big and unknown the galaxy/universe is. It makes me feel small and super unimportant to the universe. From model one to model five, I really learned a lot in a short period of time. I felt I showed heavy critical thinking. Our idea to find the line of best fit was unlike any other group. Though we were vastly wrong, it was good to try different ways to find aspects of Planet X.

Another "C" I felt I showed in this project was being a conscientious learner. We managed our time perfectly in doing 5 models with set goal dates that were completed as so. We also did self-reflection (this paragraph) and responsibility for learning (successfully adhering to the learning targets).

As a group, I felt we all worked really well although we could have worked less sloppily. Looking at these models now, I feel super sloppy.