Today for science, I built some elements. Elements are basic materials that can't be broken down any further. All other materials are comprised of elements, just like all elements are comprised of atoms. I have made models of what the atoms of the elements would look like. John Dlaton was a very important person in this discover, and he rightly claimed that all materials consist of atoms and that, in most materials, different types of atoms are bonded together. Each element's combination of molecules is different, and has a distinct shape. Below, I have built a model of some element's molecules.

Science Experiment-Rusting

For science a few days ago, I rusted some metal. It was almost exiting as the time I grew some weeds! ;D I took some steel wool, put it in a bowl, poured some water over it, then let it sit for a few days. Although the experiment was very simple, the conept behind oxidation is very complex. Early scientists believed that rust was actually the metal burning, just at a slow speed. He thought that the rust was the residue left behind when all of the "phlogiston" burned away. Now, we know that rust is actually the chemical reaction between iron particles and air. Below, I have uploaded some pictures of the rusted steel wool.

Science Experiment-Flying!

For science today, I built a model airplane. I used cardboard, glue, a fastener, a plastic propeller, and a rubber band. As you probably guessed from the materials, it was rubber-band powered. In 1899, Orville and Wilbur Wright started experimenting with flying machine. Four years after they started experimenting, they became the first humans to perform a controlled, powered flight. Today, the plane that I built was a simple toy, but it demonstrated some of the most important theories and laws in flight. I was able to get it to fly for several, feet, before it would nose-dive and destroy itself on the nearest hard surface.

The first step in building the plane was to assemble the fuselage. I folded the perforated piece of cardboard from my kit into a triangular tube. This would be the main part of my aircraft. After the fuselage dried, I worked on creating the rudder assembly. This consisted of three small pieces of cardboard. When these were all glued together and done drying, I glued them, along with the main wing, onto the fuselage. After I had let it dry, it was time to start flying!

The first flight attempt failed miserably. The plane would fly for about 3 feet, then abruptly nosedive into the ground. It did this several times, and once knocked the propeller out of it’s socket. I tried attaching several coins to the front of the plane, just behind the propeller. This dramatically improved the performance of it, and stabilized it’s flight. It would go much farther now, around 20 feet.

I’ve built thousands of paper and rubber-band airplanes. It never gets old, though. It’s always amazing how you can turn come cardboard, a propeller, and a rubber band into something that can fly. Below, I have some pictures of my plane on the ground, and some slightly photoshopped pictures of it in the air.

Stress Test-Science Experiment

For my Science project on Monday, I learned about different building materials. To do that, I build two slabs of plaster. One was just plaster, and the other had wire running through it, in a crisscross pattern. The wire would supposedly make the plaster much stronger, with the ability to flex without breaking. You can see a picture of reinforced concrete below.

You can see the iron bars lacing through the cement.

After I had made the two plaster blocks, I set them up like a bridge in between two containers. Next, I set a cup on top of the unreinforced plaster. I then filled it up with water, a cup at a time. Once I had filled the cup with 5 and 1/2 cups, the plaster shattered, making a huge mess. After I had cleaned that up, I put the reinforced plaster block over the same spot. The reinforced plaster took over 7 cups of water, and a several pound piece of slate before it finally broke. This experiment showed how the strength of a material can be greatly improved by lacing it with wire, or a similar material. This technique was invented by Joseph Monier, who origionally invented it to improve the strength of his garden beds and pipes.

You can see some videos and pictures of the experiment below.

Science Unit Summary

Summary of Ancient Scientist Unit Study

For my science unit this year, I have been learning about ancient scientists. I read background information about the scientist, do experiments related to their discoveries, and write about my findings in my blog. Below, I am going to give a short summary of what I have done so far.

I am doing experiments out of a science book called "Milestones in Science". The book groups scientists by their fields, and then chronologically within each one. So far, I have studied "Light, Colors, and Sound", "Heat, Steam, and Engines", "Magnetism and Electricity", and "Force". To start off with, I read a short description of the scientist in the manual. It includes their most famous achievements, when and where they were born, and how their achievements helped mankind. After I have read their summary, I learn more about the scientist from their biographies, or by reading about them in the one and only online encyclopedia. After I have read about them, I conduct and experiment based on their discoveries.

The experiment is always based on one of the scientist's own experiments, or one of the theories that they are famous for. The complexity of the experiment ranges anywhere from filling a cup with water (Newton's third law of motion) to building my very own Camera Obscura, (demonstrating some basic principles of light and how they can be used.) The experiment usually has several steps, and several different parts. Each section usually shows that the same principal/theory can influence many different areas. For example, when I learned about Isaac Newton, I did several experiments all proving his laws of motion. The average number of experiments per scientist is about three.

After I have researched the scientist, I write a blog entry, and make a timeline card. On my blog, I talk about the experiments I did that day, and what scientist I learned about. (You can view my blog at kaiindvik.blogspot.com) I tell what the experiments proved/disproved, and how the scientist made a contribution to humanity. I almost always take pictures of my experiments, and sometimes film a video of them in action. After the blog post is done, I make a timeline entry. I give information like when and where the scientist was born, and his most important achievements. The timeline cards are on display now.

MORE PHYSICS!!!

I continued on my physics unit today, and learned about Isaac Newton. He is the man credited with discovering the relation between mass and inertia, acceleration, and three laws of motion.

Today, I did three experiments, all related to his laws of motion. The first one explained that "The change in motion of a body is proportional to the strength and direction of the applied force", which is Newton's second law of motion.

First, I attached a bungee cord to a cup, and measured how long the bungee cord stretched.

It was 5 1/4 inches. Next, I added 25 ml of water. The bungee cord extended to 5 3/8 inches. I added 25 more m of water. The bungee cord extended to 5 1/2 inches. Finally, I added another 50 ml, totalling 100 ml of water. The bungee cord measured 6 inches, 3/4 inches longer then it started.

This simple experiment proves that the more force that is applied to an object, the greater the force of the reaction will be.

You can see some pictures of it below. (You can't really tell the difference between them, but when I measured it, there was definitely a change in the bungee cord.)

For my second experiment, I did one that showed friction in action, and how it interacts with other forces. Newton's first law of motion states "A body persists its state of rest or of uniform motion unless acted upon by an external unbalanced force." For the experiment I conducted today, I first took a coin and put it on a piece of paper. Next, I placed the paper over a cup so the coin was directly above the opening, but on top of the paper. If I pulled the paper slowly, the coin would move with it. However, if I jerked it quickly, then the coin would stay in place, and fall into the cup. I took a video of it, which I have posted below.

When I pull the paper slowly, the friction in between the coin and the paper is greater than the coin's inertia, which results in the coin moving along with the paper. However, when I pull the paper quickly, the force of me pulling the paper is greater than the force of the friction, and the coin stays where it was, dropping into the cup. This is proving Newton's first law of motion.

You can learn more about this here.

For my third and final experiment, I conducted a very interesting one. It involved Newton's third law of motion, which is "To every action there is an equal and opposite reaction."

There is an interesting invention, called Newton's Cradle, which demonstrate's this law. It works because the force of one ball striking the group is enough to move a ball equal to it's own weight. Also, the force of two balls is enough to move two balls, equal to their own weight, and so on and so forth.

I made a simple version of this, involving marbles and a box. You can see a video of a large Cradle below.