Aiden

** Entry #1--Electronics and Computers **
==An analog signal is a smooth signal and the electrical signal increase and decrease slowly. A digital signal is an unsmooth transition. A digital signal is a quick jump between signals and is represented with number but only the numbers 1 and 0. An example of an analog signal is a manual clock, the hands move smoother and a digital signal is like a digital clock the numbers jump from one to another. The difference between the analog signal and the digital signal is the analog signal changes smoothly and the digital signal changes in a jump or a step. A semiconductor is better at conducting electricity than nonmetals but it is worse at conducting electricity than metals. Semiconductors are put together to form or change the amount of electric current that flows in a circuit. A semiconductor can increase or decrease the flow of electric current in a circuit. A diode is a semiconductor tube in which the current can only pass through in one direction. A diode is used to control the flow of electrons in a circuit so they can only flow in one direction. A transistor is used to amplify the flow of a current. An integrated circuit is when there is a complex circuit on one chip that contains bunches of diodes and transistors. ==

==When traveling to Mars to search for life electronic devices are some of the most important things when traveling to Mars. Now, pretend that you are in a spaceship and air from outside starts leaking inside the ship. Without communications you would be stuck and you could not repot to base back on Earth and let them know of the problem and they would not know. Unless you know how to stop the leak you would be stuck. Without electronic devices we never would have made any of the space discovers that we have made today. We would have no pictures and we would only have the people who lived to tell it. These people probably would have died if there were no electronic devices. Thus meaning there was no way of recording data. Also, imagine if you were trying to get to Mars we would have had no idea where to go. The people at base would be following the route on a map but that is not very helpful if you do not know where the spaceship is or what lies ahead you could be travelling for a much longer time and being lost in space does not sound like very much fun. From what you can see above there would be very little chance of making it to Mars and back without any electronic devices. ==

Ms. Mc - good general overiew of electronics and how we might use electronic devices on a mission to search for life on Mars. You could have included specific electronic devices that we would use to explore Mars' surface (i.e., the rovers, lasers, thermometers, etc.). Please be sure to read over your entries and check for spelling/grammar errors before posting. I recommend writing them in Word and checking these things before you copy and paste onto the Wiki. 8.5/10

4/5/2011 Entry #2-- History of Rockets

[[image:ael_chineserocket.png width="150" height="98" caption="Figure 1: Chinese Arrow Rocket"]]
==Rockets have formed the world as we know it today; we have ventured out of our atmospheres into other planets atmospheres. This has provided us with outstanding information which also leads us to more discoveries. The first rocket like device dates back 100 B.C. with the Ancient Greek inventor Alexandria. Alexandria's invention aeolipile which is a steam propelled device. Also, the Chinese had made gunpowder propelled rockets. The Chinese used these rockets for religious ceremonies not for warfare. These rockets where bamboo tubes filled with gunpowder and then thrown into a fire. The Chinese stared to experiment with these rockets they attached them to their arrows and soon found out that the arrows could launch the arrows farther. This is how the first rocket was born…. ==


== == ==As you can see we have come a long way in since the Greek steam propelled device to the Chinese rockets. Subsequently the Goddard's rocket was born. Robert H. Goddard stared to test different kinds of fuels (solid and liquid) and found out that a liquid fuel works much better than a solid fuel propelled rocket. Next, the Russian and Germans started using and testing liquid and solid propellants and once again the liquid propellants surpassed the solid propellants. Once again you can see that rockets will never stop. We will push them to places no one has every explored before. == Ms. Mc - Good summary of the history of rocketry. When discussing history, it always is a good idea to include dates so your reader knows when certain events occurred. Please be sure to include a figure # and title for your drawings/photos. 13.5/15

4/4/2011 Entry #3--Scratch Project Instructions to run simulation: media type="custom" key="8956122"
 * Make sure your sound is on.
 * Click on green flag to start.
 * Click the red circle to stop. (Note: once you press this button the simulation does not start from were you stopped it.)

4/13/2011 Entry #4--Labeling The Parts On The Rocket And Their Uses

The nose cone on the rocket aerodynamic so the rocket can fly farther faster. The body tube is the main structural part of the rocket; it is like the body or frame for a car. The recovery system is used to get the rocket safely to the ground. The recovery wadding is to protect the recovery system from hot ejection gases. The launch lugh is used to guide the rocket launch pad straight. The fins keeps the rocket flying straight. The motor mount holds the motor in the rocket. The rocket motor propellers the rocket.

//Ms. Mc: Good labels and definitions. Please read over your entries for grammar and spelling errors before posting (-1). Also don't forget to put a line between your entries with the blude line button to the left of the link button at the top of the page when you are in edit mode. I did it for you this time. 19/20 //

4/13/2011 Entry #5-- Launch Analysis

The purpose of this experiment was to see if the mass of the rocket affects the apogee of the rocket. The forces that were acting on the rocket when it was on the launch pad were gravity acting down and the force of the launch pad was pushing upward; these forces were even which was the reason the rocket was sitting still on the launch pad. When the rocket lifted off the launch pad the thrust from the rocket’s engine overcame the small force of gravity and the even smaller force of air resistance. Once the rocket reached powered flight the thrust was over powering the forces of gravity and air resistance. When the rocket was coasting gravity and air resistance were working against the rocket, the rocket was still moving upward because of its inertia from takeoff. When the rocket reached apogee the only force acting on the rocket would be gravity. It was hypothesized that if the rocket is too heavy then it will not fly this will happen because the rocket is too heavy. If the rocket is too light then is will wobble out of control. If the rocket is just the right weight then it will fly the maximum distance and height.

Group 7 had the lightest rocket with a mass of 41.5g and Group 4 had the heaviest rocket weighting at 46.9g. Group 4 had the lowest apogee with 62m and Group 2 had the highest apogee with 119m.This is an inverse relationship because when the mass of the rocket is greater the apogee is lower and when the mass of the rocket is lower the apogee is higher. Here it can be seen that when one piece of data goes up the other piece of data goes down, and when one goes down the other goes up, which makes this an inverse relationship. There is 1 outlier in this set of data with Group 7’s rocket it was the lightest but the apogee was higher Group 4’s rocket which was the heaviest rocket. This was stated in the hypothesis, that if the rocket is too heavy or to light it will not fly. This means that this hypothesis is confirmed because the two lowest flying rockets were Group 7 with a mass of 41.5g and an apogee of 69m and Group 4 with a mass of 46.9g and an apogee of 62m.

Entry #6-- Crash Course in Astronomy
==A quark is an fundamental elementary particle. People discovered that high-energy collisions could divide protons and neutrons but not electrons. When these protons and neutrons are split smaller particles where found theses were quarks.== Our moon came to revolve around Earth when a planet about the size of mars collided with Earth. When this collision occurred most of the mass stayed with earth. Then the moon started to revolve around us.

Ms. Mc: Need to have a little more detail in your responses (-1). You were to identify the types of quarks as well. Good pictures and captions. Feel free to start with #1 for each entry if you like. Please separate your entries with a line. 9/10

 5/9/2011

== The robot should drive forward then turn right. The robot should again drive forward and then does a point turn to the left. Then drive backwards and once it gets to the end of the course make 2 complete circles. Once the robot has completed the circles it should display a smile and make a clapping sound. This challenge could possible be used by a rover on mars to navigate difficult terrain. == == ==

Block 1: a movement block that tells the robot to activate servomotors B and C so it moves forward for 4 rotations at 75% power and then brakes. Block 2: a movement block that tells the robot to activate servomotors B and C so it moves backwards at a left turn 180 degrees at 75% power and then brakes. Block 3: a movement block that tells the robot to activate servomotors B and C so it moves forward for 2 rotations at 75% power and then brakes. Block 4: a movement block that tells the robot to activate servomotors B and C so it moves backwards at a right turn 180 degrees at 75% power and then brakes. Block 5: a movement block that tells the robot to activate servomotors B and C so it moves backward for 1 rotation at 75% power and then brakes. Block 6: a movement block that tells the robot to activate servomotors B and C so it moves backwards at a left turn for 4 rotations and then brakes. Block 7: a display block that displays Smile 01 at X12 and Y8 Block 8: a sound block that plays ! Applause at 75% volume Block 1: The robot moves forward. Block 2: The robot makes a 90 o turn. Block 3: The robot moves forward. Block 4: The robot makes a backward 90 o turn. Block 5: The robot moves backward. Block 6: The robot makes a backward left turn. Block 7: The robot shows a smile. Block 8: The robot plays an applause.