Newton's Laws for Kids! http://www.projectshum.org/Gravity/weight.html
Planet Foss http://www.fossweb.com/planetfoss/PlanetaryScience/
Hi All,Planet Foss http://www.fossweb.com/planetfoss/PlanetaryScience/
Can you believe we are almost at the half-way point of the semester? This week Read Ch 5 on Projectile and Satellite Motion. Answer QUESTION 6 Does changing the amount of a material, change the density? (Be specific and give examples). We will also be looking at another Planetary Motion simulation at the Foss website http://www.fossweb.com/modules3-6/ModelsandDesigns/index.html and an activity.
Have a great week.
Dr. E
Tuesday
ReplyDeleteWe spent most of today’s class working on a lab project. In groups, we designed and built a car, aiming to have the fastest and safest one in class. Our group was optimistic in the beginning with our car, but after our first idea for wheels didn’t work, we struggled finding another way to build our car. We tried several more ideas, but not of them worked either. So in order to actually get a reading for our car, we borrowed the wheels from another group. Apparently, our car wasn’t very aerodynamic because even with the good wheels, we had the slowest time. Also with the amount of time we spent trying to find wheels, our car wasn’t very visually appealing. This lab reinforced the good decision I made in not becoming an engineer.
Thursday
We did another lab activity in class today, but this one dealt with falling bodies. We used a LabQuest and motion detector to find the time, speed, and velocity of a coffee filter and paper cupcake holder when we dropped them. Unlike our last activity, our group was pretty efficient during this lab. We found that the cupcake holder fell more quickly than the coffee filter. We attributed this to the lack of air resistance that the cupcake holder experienced when compared to the coffee filter. We also calculated falling time and falling distance to compare the two objects.
Does changing the amount of material change the density? Be specific and give examples.
It depends, if you add or subtract material, changing the mass and volume, the density would still be the same. However, if you add or subtract material while keeping the volume the same (making the material more or less compact) then the density would change. For example, if you had a marshmallow and added another marshmallow just so that they are next to each other the density would not change, but if you had two marshmallows and squished them together so that they are the same in volume as one marshmallow then the density would be different.
Emily Struck
ReplyDeleteWeek 7 Blog Post
Tuesday:
Tuesday, February 22, we began class by reviewing momentum and impulse. After our recap of last week’s material, we began to discuss the lab that we would be doing with our group members. The goal of the lab was to construct a fast, yet safe car that would protect a plastic egg from the effects of the inertia when the car crashes. The material we used to create our car consisted of a plastic tray (which served as the car itself), plastic lids, which we poked a whole through and slid on a straw to serve as wheels for our vehicle, and an insulated foam cup containing the egg safely in a loose bed of string, (with a piece of tape over the top to serve as the seatbelt for the egg). Although we thought our materials would work well for our car, the plastic lids which served as wheels were not easy to shift. To fix this error, we borrowed styrofoam balls from another group to take the place of our plastic lids. Once we fixed this, our car was well on its way to becoming a fast, yet safe car which protected the egg from the effects of inertia when the car crashed.
Thursday:
In today’s class period, we completed a lab dealing with falling objects. Our objective was to use a LabQuest and a Motion Detector to measure distance and velocity of a coffee filter and a cupcake holder. From our trials, we concluded that the cupcake holder was faster because it was smaller and had less air resistance than the coffee filter. We also calculated the positions and times of the two objects by subtracting the drop-point distance from the landing-point distance.
Does changing the amount of material change the density?
Depending on how you look at it, changing the amount of material can either change or not change the density. If you have one teddy graham, and you add another to it by sticking them together, the density will stay the same; however, if you put two teddy grahams together so that they equal the volume of one teddy graham, the density will change.
Class Activities
ReplyDeleteOn Tuesday we did a lab that dealt with designing an aerodynamic, attractive, and safe car, that would be tested on a ramp, with a ping pong ball inside. My group discovered that the car would only be fast if the wheels spun in a normal fashion. We took sucker sticks and attached to balls at either end. By putting small straws over the sticks, the "axle" spun like on a regular car. To make it safe we taped a styro-foam cup in the plastic container, which was the car body, and put the ball in the cup. Then covered the opening with two strips of tape for a "seat belt". Our car went down the ramp of 100 cm in 1.03 seconds, which made it one of the faster cars.
On Thursday, we did another lab involving falling bodies. In this lab we experimented dropping coffee filters and muffin cups from about 1/2 a meter off the floor. We used a motion detector and a LabQuest to graph the results and compare the movement between the two. We had some trouble loading the data after our tests, but from the graph showing all the runs we concluded that the single muffin cup fell the fastest.
Does changing the amount of material change the density?
We can look at this in two ways, if you were to simply add more material and change the mass and volume as well, the density would remain the same. However, if you added material without changing its volume the density would change. For example, when chewing a piece of gum if you added another piece and kept the size of the gum the same, the density would change.
Tuesday in class, we did a very fun lab in class building a car out of some random objects. The point of the lab was to make a car that was fast but still safe in protecting the plastic ball we were given. We first drew what the car should look like and then got our supplies to create it. We made the fastest car in the class. For wheels we used styrofoam balls that used straws as an axel. They turned very quickly. The wheels were attached to a plastic container and we protected our ball by covering it with a styrofoam cup and taped it in as a seatbelt. This car was extremely safe! The impact of stopping quickly had no effects on the egg.
ReplyDeleteThursday in class, we did a lab about falling bodies. In this lab, we meausered the distance and time of a large and small coffee filter falling through the air. We figured out that the larger one had more air resistance to it, so it took longer to get to the ground. We then graphed our results to figure out that the small coffee filter fell faster.
Changing the amount of material change the density?
The density could potentially stay the same if you add or take away mass or volume. If the volume stays the same but changed the amount of materials there it would change the density. It is interesting to see by changing something so small it can either change the density or not change the density.
Tuesday:
ReplyDeleteIn class we did a lab where we built a car that needed to be safe, attractive, and fast. We built the car out of straws, plastic container, string, and plastic wheels. We designed our car to be fast and safe and added stickers to make it attractive. Our car wasn't the fastest car but was very safe. The impact of the car hitting the trashcan didn't affect our "passenger" and proved that it was a safetly built car.
Thursday:
In class we did a lab about falling bodies. We set up the LabQuest with the motion detector to detect the motion of the fallin bodies. We found out that the coffee filter fell slower due to molecules in the air. It had more air resistance falling to the ground.
Changing the amount of material change the density?
It depends. If the material takes up the same amount of space as the original object then the density is the same. If the material is bigger than the original object then the density will change. Density is the measure of how much mass occupies a given space.
TUESDAY
ReplyDeleteIn class on Tuesday we did a lab where each group made a car made of random objects. The point of the lab was to make the car fast, safe, and attractive. The lab called for the students to build a car that would keep the raw egg intact when it hit the, "brick wall."(trash can) Our group began by drawing out what the car should look like and then our equipment manager went and got the supplies. Through trial and error we learned the correct way to place our wheels to ensure that that could turn quickly. Our group ended up making the fastest car in the class.
THURSDAY
In class on Thursday we did another lab that was called, "Falling Bodies." We used to LabQuest device and recorded how fast and how long two different sizes of coffee filters fell. We had some technical difficulties in the beginning, but finally figured out was wrong. The bigger coffee filter fell slower due to air resistance. We then graphed our results to see how the coffee filters compared graphically.
Does changing the amount of material affect the density?
A person can look at the answer to this question in two different ways, if you were to add more material, and change the mass and volume too, the density would remain the same. However, if you add material without changing its volume, the density would change. The definition of density is the measure of how much mass occupies any given space.
Tuesday:
ReplyDeleteIn class we did an activity building cars. We had to make a car out of normal household items that would hold a pingpong ball and have the highest velocity in the class. My group used a chip holder, straws, a paper plate,a coffee cup, sucker sticks, tape and decorater balls. We found that the decorater balls and the srtaws didn;t stay together very well so we added tape to the ends of the sucker sticks. We found that this helped alot and the car moved smoothly. We had a rough plan when we started to build, but most of our ideas were trial and error. When we calaberated the information with the class our car was the second fastest.
Thursday:
In class we did a lab dealing with falling bodies. We tested the velocity of coffee filters and cupcake holds falling. We had to test the two things staked three high, two high, and one at a time. We found that the more coffee filters or cupcake holders you add the faster it falls. The coffee filters fell slower than the cupcake holders because the surface area of the filters is larger. The air resistance played a large part in how fast the two fell. We used LabQuests to graph the information as we gathered it and then compared our findings. That is how we found out that the more filters you add the faster it will fall.
Question:
Changing the amount of material can change the density if the material is condensed. However you can add material, and only change the volume without changing the mass.
Tuesday
ReplyDeleteIn class on Tuesday, we did an activity to build cars. We had to make an attractive, fast, and safe car out of household items. My group used styrofoam balls held together by sucker sticks as the wheels and axles. We put the sucker sticks inside a straw and taped the straw to the plastic container we were given. We put the ping pong ball insaide the styrofoam cup and put the cup in the plastic container like a car seat. We then put a paper plate over the top for a roof. We gave our car a sunroof and decorated it with stickers to make it more attractive. Our car was the second fastest in the class and was very safe; the ping pong ball stayed in its "seat."
Thursday
On Thursday we did a lab about falling bodies. We tested the difference of velocities of one, two, and three coffee filters and one, two, and three cupcake holders. The more cupcake holders or coffee filters you have, the faster they fall, and the cupcake holders fall faster than the coffee filters because they have less surface area and therefore less air resistance.
Does changing the amount of a material change the density?
If you add more material to an object without changing the size of the object, the density will increase. However, if you increase the amount of material in an object proportionally to the increase of the object's size, the density will stay the same.
In Tuesday's class we had to design a car that was fast and safe. Our group couldn't get the wheels to work the best and after trying a couple of different items for the wheels we ended up borrowing wheels from another group just so we could run our car. Needless to say we didn't have a good design and it was not a very attractive vehicle at that. Our group car didn't have a very fast time, but it ended up running.
ReplyDeleteIn Thursday's class we did another project called falling bodies. We used a coffee filter and a paper cupcake holder to see which fell faster and we had to explain why. The cupcake holder fell faster due to less air resistance.
Does changing the amount of material change the density? If you add more material to an object you would be changing the size and the density would increase unless you proportionally add material to keep the density the same.
Tuesday
ReplyDeleteOn Tuesday our groups were asked to design cars that were safe, attractive, and fast. The passenger in the car was a ping-pong ball and our groups had to construct a car that could protect the ball after impact. To build the car we used a plastic container, some straws, a seat, and some padding for the body of the car. For the wheels our group used straws, pins, lids, and sucker sticks. Our car turned out pretty unattractive and wasn't all that fast.
Thursday
Thursdays lab was on falling bodies. The lab was done with a coffee filter and a cupcake hold and testing the velocity of those objects. We used motion detector and LabQuests to get the data of the velocity of the cupcake hold and coffee filter when they were dropped. We recorded our data after the lab and concluded that the cupcake hold drops faster.
Question: Does changing the amount of material change the density?
Only if the material is bigger than the original object is the density changed.
Tuesday:
ReplyDeleteOn Tuesday, we did a really fun lab involving making a car out of various materials. The car had to be fast while keeping a ping-pong ball safe on impact. Our group had a lot of fun with this lab. We ended up making our car with really long axles to keep stability and a balloon attached to the front and the back. The front balloon was supposed to kind of imitate an airbag and the back balloon provided thrust to make the car faster. We tied the ping-pong ball in the cut-out bottom of a cup to act as a seat and seat belt. Our car ended up traveling 100 centimeters in 1.8 seconds. The balloon in the front was kind of pointless because it moved before it hit the garbage can. However, the balloon in the back did make it go faster, just not fast enough to make it beat the other times in the class! This was a great lab to help students understand the effects of inertia.
Thursday:
On Thursday, we did a lab involving falling bodies. We dropped a coffee filter, a cupcake liner, and a textbook in front of a motion detector that graphed the velocity and position of the objects. After reviewing our data that we had collected, we discovered that the cupcake liner fell the fastest because it had the least amount of surface area and air resistance.
Question: Does changing the amount of material change the density?
The density changes only if the mass and volume does not change. If the mass and volume stay the same, the density will increase. Think of a hollow ball. If you fill the ball with water and the ball does not change shape or expand at all, the ball will become denser.
Tuesday
ReplyDeleteWe spent the majority of the class period designing cars that would not only look nice, but be safe and fast as well. The idea was to use a ping pong ball as a passenger and build the car out of straws, containers, and container tops as wheels. Our group did an a good job of keeping the ping-pong ball safe, however our car did not go very fast nor did it look very attractive.
Thursday
I was not in class Thursday because I was sick
Question
If you increase the material proportionally the density will stay the same. If you just add more material to change teh size the density will change
Tuesday
ReplyDeleteOn Tuesday we did a really fun project. WE had to make a car. It had to look nice, be fast, and also be safe. Our group came up with an idea to have a balloon of the front and one on the back. The one on the front was there to protect the car from hitting objects. The balloon on the back was there to increase the speed. We thought we would have a really good time compared to other groups, but we were in the slower half.
Thursday
On Thursday we worked with our groups again. This time we dropped two different "filters". One was a normal size coffee filter and the other was a cupcake liner. We had the Lab quests to monitor the data from the filters falling. The cupcake liner did fall faster. We believed this was so because it had less air resistance.
Does changing the amount of a material, change the density?
If a person would add material and keep the volume the same the density would change. If a person would add material and change the volume then the density would be the same(the same could be said if a person were to subtract material). If a person would take a toy car and fill it with sand and the car doesn't change shape then the car will become denser.
Tuesday-
ReplyDeleteWe had a lab where we were to make a car out of certain supplies that we were given and the cars were to go the fastest and be attractive. We made our car out of a plastic bowl and Styrofoam balls for wheels and a cup that held the 'egg' in place. Our group ended up having the fastest car in the class.
Does changing the amount of a material, change the density?
If you add more material and it becomes a different weight the density will change. It will make it go slower. If we would have added a bunch more padding to our car we made in class, our car would have gone slower down the platform.
Tuesday: We spent pretty much the whole class period doing an experiment that involved each of our groups to design a fast but safe "car" with given materials. We we each given a plastic container, straws, sticks, foam balls, pins, ping pong ball, etc...Our group designed the car with the foam balls as our wheels and used balloons infront of the car (acting like an airbag) and in the back of the car (which we released so make the speed of the car go faster). This project was really fun and a good way for our group to work together.
ReplyDeleteThursday: We worked with our same groups again on "falling bodies". The bodies were a cupcake holder and a coffee filter that were each dropped to test the velocity of each. We then used the lab quests to monitor the data from each of the "bodies" falling.
Does changing the same amount of material change the density? - if you change the amount of material, it can be more dense IF the material is condensed. Although, if you add more material to an object proportional to the objects size, density will stay the same.
On Tuesday, we did a great activity in groups. We got the opportunity to build a “car” out of objects found around the classroom and the goal of building the car was to focus on having a high speed with optimum safety. In our group, we had no plan. We just put things together as we went and judged whether or not that idea would work as a group. It almost resembled a puzzle by looking for things that fit together. I was pretty proud of our car and the fact that our ball, which was supposed to resemble a person, was safe during the test processes. Our car went 1 meter in 1.53 seconds, which was surprising because our wheels were awkwardly put together. All in this entire lab turned out to be successful!
ReplyDeleteOn Thursday I was not able to make class due to illness.
When looking at the material needed to change density, it gets a little confusing. To me, density is difficult to change. Volume plays a big role in density so changing the volume of an object would ultimately change its density.
Tuesday:
ReplyDeleteOn Tuesday we spent most of the the class period designing cars that would be attractive, fast, and safe. There were many objects to design our car out of. Our group used sucker sticks, straws, two plastic containers, one lid to to set the ping pong ball in, and plastic wheels. We then had a little slope that we let the car move down. The distance was 100 cenitmeters. Our car went 1.2 seconds in 100 cm. This lab was a lot of fun and very successful.
Thursday:
On thursday we did another lab. This lab was called "falling bodies." We used coffee filters and cupcake liner. We figured out that the cupcake liner dropped faster then the coffee filter because it did not take as much volume and there was less air resistance.
Question:Does changing the same amount of material change the density?
If the volume stays the same, then yes the density will change.
Tuesday
ReplyDeleteOn Tuesday we spent the class time doing a project. We were split up into our normal groups and had to make a car out of the materials that Dr.E had for us. My group used the Popsicle sticks to stick in to the balls. Then put the stick in to a straw so that the wheels or balls could turn. Since the project was to keep the person or the ping pong ball safe. My group decided to put a balloon on the front of our car to act as an airbag. Over the car was fast, safe, and beautiful. If your axles would not have been so long the car most likely would have been faster. That is something that we talked about changing after.
Thursday
On Thursday we did another project, this time it was about falling bodies. We used LabQuest and motion detector. Once we had it all set up we had to drop different objects to see with one had more air resistance and how fast they would fall. My group decided to drop a book like it said in the lab, even though it had been changed by the teacher. My group was then able to show how dropping something bigger makes a difference with the air resistance and the speed that it fell.
Does changing the amount of material change the density?
We can look at this in two ways, if you were to simply add more material and change the mass and volume as well, the density would remain the same. However, if you added material without changing its volume the density would change.
Tuesday:
ReplyDeleteOn Tuesday in class we built cars out of standard objects found around the classroom. The objective of the activity was to built a fast but safe car. Our group drew out a basic layout and included some characteristics that we knew our car needed to have. However, we did not know what our materials would be at this point so it was just a very basic layout. After recieving our materials, we just kind of tried different things and used what worked the best. Our car turned out to be very attractive and fairly fast, but I think it may have been a little bit too heavy to be the fastest car in the class.
Thursday: In class on Thursday we completed another lab. This lab had to deal with "falling bodies," an expression that describes the motion of a falling object. We used a LabQuest to detect the motion of a coffee filter as it dropped to the floor from a 50 cm height, as well as the motion of a cupcake liner. I did not really understand the concepts of this lab. Our results did not make much sense to me, but I was able to conclude that the filters fell at a constant velocity until they hit the floor, and then its velocity was zero. I was also able to decipher that the smaller cupcake liner fell more quickly than the larger coffee filter.
Does changing the amount of material in an object change its density?
If you add any material to an object, the density will stay the same as long as the ending amount is proportional to the initial amount. If you add an amount and the material and the the mass is condensed, then the density will change.
Tuesday: Today we began class reviewing. The majority of class we were given a task to create a car that was fast yet safe. We were given various materials to choose from. Our group used, photography film lids as wheels, connecting them to sucker sticks and slid a straw over the stick so that the wheel axel would roll. We then taped that to a plastic container (the body of the car) we then padded to car with paper towels and put a make-shift seat to hold the ping pong ball. Then we created a seatbelt with a string connected to car. Our car worked very well and our group worked well together to come up with a cohesive design. I personally believe our car was one of the most cohesive and realistic designs.
ReplyDeleteThursday: We did another lab activity. It was called falling bodies. The purpose of the lab was to see how gravitational resistance and weight related. We used a motion detector and labquest to record exact information. In the lab we dropped a coffee filter 50cm above the table and a cupcake cup from the same height. We discovered by looking at the recordings on the labquest that the cupcake cup fell faster than the coffee filter because there is less air resistance.
Does changing the amount of material in an object change its density? If the volume of the object changes then the density stays the same. It the volume stays the same then the density changes. For example if I were to fill my daughter squeky ball up with water, the volume of it does not change but the ball becomes denser.
On Tuesday in class our groups designed cars. It was a lot of fun. We had to make a car that was fast and safe but also look attractive. Our group used styrofoam balls for the wheels. We connected the balls so sucker sticks that were inside of straws so that the wheels would turn. We then use a plastic container and put a cup inside for a seat. We put the ping pong ball inside the cup. We then put a plate on stop for the roof and cut a sunroof in it. We decorated the car with spaceship stickers. Our car looked very good. It was the 2nd fastest in the class. It was also very safe because the ping pong ball stayed in the seat.
ReplyDeleteOn Thursday in class we did a lab called falling bodies. We used the labquest to detect motion of falling coffee filters and cupcake cups to see how gravitational resistance and weight related to each other. We dropped them from 50cm and found that the cupcake one had less air resistance because it was smaller so it fell faster. Though they both fell at a constant velocity until they hit the floor.
Does changing the amount of material in an object change its density?
If the mass and volume do not change, the density can change. If they both stay the same the density will increase. For example if you fill a hollow ball with water and the ball does not change shape or expand at all the ball will become denser.
Tuesday:
ReplyDeleteIn class on Tuesday, we did a group activity. We were to construct a car that was safe, durable, fast and attractive. For the body of the car, my group used a plastic container and for the wheels, we used platic lid covers. To make it safe, we used a little container and put it into the body of the car. Inside the little container is where our person (ping pong ball) sat. When we let our car roll down the ramp, it collided with the backstop and stayed together. Our person also stayed in the seat.
Thursday:
In class on Thursday, we did another group activity. We first dropped a coffee filter to the ground and then a cupcake holder, we then used a motion detector to record the data. The cupcake holder fell to the floor faster than the coffee filter because it was smaller.
Does changing the amount of material in an object change its density?
If you increase the amount of materials in the objects proportionaly, then the density will stay the same. However, if you increase the amount of materials in one object and not the other, the denisity will change.