Za Great Comparison of Motion

At the very beginning of the motion unit. I honestly had no clue about motion at all. that was pretty much it. I knew motion involve moving and force, but that was about it. Now I know a lot though.

Now that you have completed the unit, what do you know about motion compared to when you started? How do things move?

Before I had learned about motion I thought that when something was moving, another object must be touching it or pushing it. Later on I had realized that in order for an an object to be in motion the reference point or a stationary object has to be changing distance from it. Objects that are moving, the reference point of that object must be changing. A reference point should be stationary in order to see if an object is in motion. However, suppose you're on a train, you are moving reference to the ground, not the train. So, therefore, you are not in motion.

Motion

Before I started learning about motion I knew very little about motion. For example I had a very general and not scientific definition of motion which was an object is in motion if it moves from one point to another. I also had know idea of definitions such as instantaneous speed or average speed. I also did not know much about the tectonic plates. I did not know the names of the plates that are found on our Earth. I had know idea about acceleration or how to calculate acceleration of a object. After learning about motion I knew that motion is when an object moves in any way from its reference point. I knew that a reference point was a object that was used as a reference to measure the motion of a object. I learned what instantaneous speed was (the speed of an object at a specific point of time.) what average speed was (the speed of a object throughout its whole journey.) I learned all bout the tectonic plates. I found out that acceleration is the change of an objects speed or direction, and I found out how to calculate acceleration (you subtract the initial speed of a object by its final speed then divided it by the time at which the acceleration took place.) I think overall I know way more about motion than I did before learning about it. 

- Ibrahim Ahmed

My Knowledge on Motion

At the beginning of the unit I had next to no prior knowledge on the motion unit overall. But as I began the unit the little knowledge I had about this subject began to come back to me, I began to remember how to find the average speed, what is speed.
But I also learned about topics like a reference point that you use to see if motion is happening or not. From the reference point came out the relative motion, which explains why somethings seem to be in motion but can also not be in motion, its all relative to what you use as a reference point. It also told me about the International system of Units that uses meters to measure distance so that all measurements stay equal when scientist trade notes and conclusions.From motion comes out acceleration, I learned how to figure out how fast the object accelerates, final speed minus the initial speed divided by the time, will get the acceleration. Acceleration is not only increasing speed but is also decreasing speed and changing direction. All three of these changes in speed are was of an object accelerating. Something moves because of acceleration and how it compares to the reference point, even the tiniest movement is motion. That is most of what I had learned in the Motion unit, it helped me get a grasped on what is to come in science.

When you think of it, when you think to reflect about motion your brain's cells are moving. trolololo

            When we first started the lesson, to be honest, I faced many difficulties as the teacher started explaining the first section of the chapter and I was kind of lost since I had never studied about motion and how objects move before. As a matter a fact, just before that, as our teacher Miss. Ahmad started explaining, she told us to write down what exactly is motion. I remember putting down:" Motion is the movement of an object. It is its traveling speed in the air". And now as I reread it, I realize how much I have learned form this chapter and that now, I am able to expand and add on to this simple basic answer that served as a foundation. I learned a lot of things about this subject not only through the intense explanation of Miss. Ahmad but also through many assessments, questions activities and a mind map. The mind map especially assisted my learning as it was a new but effective tool that helped me visually analyze the information and store it adequately and swiftly in my brain.

 

            Anyways, if I had to think of motion as center branch, it would definitely be attached to four other sub branches that encompass everything that we learned in the 3 sections of this chapter. Those branches would be measured in, compared to, described by, and happens when. The first branch would explain how motion is measured in the International System of Units (SI) that is used by scientists all over the world. It comes from the French phrase "Systeme Internationale" and this system describes all quantities such as length, mass, time… The second branch would clarify how to determine if an object is in motion or not, and how this object has to change position (distance or direction) compared to a reference point that is used for comparison. This reference point can either be stationary (tree…) or moving (moving car…). However it is always better to have a stationary reference point rather than a moving one because a moving reference point might trick you into thinking that you are moving when actually you aren't. And depending on this reference point the object is moving or not. For example if there is a book on  table and the reference point is the table the book isn't moving but if the reference point is the sun it is moving because Earth is moving around the sun and the distance between them differs every second. The third branch would explain how motion is described by acceleration. And in science, acceleration (the rate at which velocity changes) is an increase in speed, decrease in speed or change in direction. Acceleration can also be found by dividing the final speed minus the initial speed over time where time is always squared in the answer and it can be graphed in a speed versus time or distance versus time graph. And finally the last branch explains when motion occurs, that is when there is a change in velocity. Velocity is composed of direction which is crucial in some cases (airplanes…) and also speed which is distance over time. And in science, there are two kinds of speed: instantaneous which is measured by a speed graph and average speed which is found by dividing the total distance by the total time. And speed can also be graphed in a distance versus time graph where the slope of this graph represents the rate of change in speed and can be found by calculating the rise over the run. If the slope is a straight line, there is a constant speed and depending on its steepness, we can know if the object is moving slower or faster. And finally we also learned how the Earth's plates move very slowly causing the Earth's landmasses to change over time 9it has changed a lot actually from 250 million years ago). This happens due to the rising of hot materials heating up from the Earth's core's extremely boiling temperature. This rise of hot material pushes the cooler materials at the top layer aside which eventually sink down; this rising and seeking of material create small vibrations within the Earth's crust which then leads to moving plates. And to add on to this as well as link this acquired knowledge to a modern situation (Nepali earthquake), we also learned how this is also linked to earthquakes and how when two plates move in opposite directions, pressure builds up until a fault happen and this huge energy accumulated over a long time transforms into the form of vibrations and shakes which create a devastating earthquake

 

            To conclude I want to say that in general, I have learned a lot in this lesson considering the fact that I knew nothing at the start and I have also gained a lot of knowledge in physics on motion. I would also like to thank Miss. Ahmad for her hard work and for all the time she used to make sure that we all understand every bit of this easy but long lesson that required determination and perseverance and I am very excited to learn about force that ties in with motion.

Joseph Moussa

(37 days left)

Motion Reflection

At the beginning of this unit on motion, I knew very little information and could not comprehend and clearly understand what motion really is. Then we did projects and analysis's along with reading text from the books which helped me clarify any queries I had about motion.

To me, motion can only be occurring if you have a reference point that is either stationary or moving. A reference point is an object or place that can be used to determine whether an object's distance from another is changing. You would be able to determine if an object is in motion by picking a reference point that is stationary or moving, like the sun. For example, compare a pen on your desk in motion to your bed. This means that the pen is not in motion as the pen itself, is stationary and so is the bed. However, if you would refer the pen to the sun, the pen would be in motion as the sun in rotating and the distance  between the pen and sun varies.        

While studying about motion, we also learned about speed, velocity, and acceleration. Speed calculates the distance traveled per unit of time while the speed given in direction is the velocity. Acceleration is related to velocity because it is the rate at which velocity changes. An object can accelerate in three different ways: changing direction, increasing speed and decreasing speed. To take in all of this information with not too many doubts and questions, we had created Mind Maps which were easy to study from as they were color codes which allowed me to group information that related to each other, so it would be easier when it came to the chapter test.

-Sayuri Moodley

Motion

Before we started the unit about motion and, barely knew what it was and how I would be able to describe what motion is. But now I feel very confident about it, and I believe I can thoroughly explain what motion is and when an object is in motion.

I learned that an object is in motion when its distance from another object is changing. To determine whether or not an object is in motion, you usually use a reference point. A reference point is a place or object used for comparison to determine if something is in motion. Stationary objects make good reference points. If a reference point is not stationary then it would be very hard to determine if an object is in motion. There is also such thing as relative motion and that is when you can state that whether or not an object is moving depends on the reference point that you choose. I also learned that scientists all over the world use the same measuring system, that way communication is much more easier and clearer. The system of measurement is called the International System of Units or, in french Systeme International (SI). SI units are used to describe the distance an object moves. The (SI) unit of length is the meter. But that's not it, I learned all about speed, how to calculate it, same goes to acceleration. Graphing motion is also something that I now know how to do. In this unit we were also taught about Earth's plates, the Theory of Plate Tectonics, and plates movement and why they move.

-Lina Abdelgabar