Marble Motion

Today in science class we did a lab to see dose the mass of a marble affect how it moves. One question n that we had was when given a force what happens to it motion. We tested this lab by taking different kind of balls to see how they move when force is applied. When we applied we used straw and blew through them to make force. First we used the light weight balls to see how they move most of them just came across the table easily and didn't make any curves because they were going quick. Then we came to the bigger balls. The tennis ball was too heavy and we couldn’t move it. The Styrofoam balls were big but they didn’t much density so they were easy to my. So the mass of the marble dose affect its movement because the more mass the more force has to be applied. I would like for us to see which marble will accelerate the fastest when going down a ramp.

From Feet to Fanthoms

This week we have been learning about the measurement system. We did a lab to see if the old metric system was correct so we used there measurement system. The Guiding question is what is the importance of having an International measuring system? How accurate are old measurements using body parts? My hypothesis is it is not that accurate because body part grow at different times so some time u may be huge or to small so it isn't accurate. So for the lab we had to measure different objects with their system. The materials we used were:
• Partner
• Objects in the classroom (whiteboard, desk, hallway, SPACE book, Peep, Crayon box)
• List of ways to measure:
Pace: legs outstretched =1 yard approximately or 1 meter
Egyptian cubit= elbow to tip of the middle finger= 18 inches or 45 cm
Fathom = middle finger to middle finger across the body = 6 feet, 180 cm, 1.8m
Palm = across the palm of the hand = 3 inches or 8 cm
Hand including thumb = 4 inches or 10 cm
Span = from tip of thumb to tip of little finger= 3 palms or 9 inches or 24 cm
English yard = from fingertip of arm to nose = 36 inches or about 1 meter
Foot = 12 “or 30 cm approximately
Fingernail = tip of pinky =1/2 inch = 1 cm.
• Meter stick or measuring tape
• Calculator
The process that we had to do is:
1. Make a data table in your notebook with 7 columns and 7 rows. (See below).
2. Choose one of the six objects or distances you will measure.
3. Determine what form of measurement you will make with the first object. (For example: Length of the 6th grade hallway with paces, book with palm or hand, fingernail for crayon box, etc…)
4. Measure it with the determined form of measurement 3 times, and then find the average.
5. Measure it with the meter stick/or measuring tape and find the actual measurement. (IMPORTANT!!!!! BE SURE THAT THE UNITS OF MEASUREMENT STAY THE SAME, either inches or centimeters or yards or feet or meters and the average needs to be in the same units)
6. Repeat the same for each of the five objects that are left and measure it with a different type of measurement, 3 times, find the average and again the actual measurement.
7. Compare class data results. Find the average of these results.

Data analysis: When i analyzed my data i saw that the measurements weren't that far apart so it wasn't that accurate but it could still be used.

Concusion: The old metric system was not really accurate but useful since if you don't have a ruler at hand you can use it. The importance of having a international measurement system is important because we can use the same one and understand it. Well my hypothesis was correct. The smaller object were easier to measure since it didn't take much time. I prefer to use the modern method since it easier and less demanding but if i didn't have a ruler i would prefer the old system.

Further inquire: I don't have any question a i think i did everything correct. Next time i would like to measure more object