DAY 7
Period 1, your agenda is here.
Period 5, your agenda is below the hash - - - - - marks. Scroll
down.
#Goals: SWBAT...
1. use conversion factors to change the dimensions of a number
2. create a graph using Google Sheets
3. Describe the similarities between distance and displacement
Period 1 Warm-Up: (8minutes)
-while attendance is being called, complete the following
Your homework was to finish the graphs in the "Data for Plotting Graphs" handout. If you haven't already posted a photo of your answers to problem #2 and your graph for problem #2, do so now. You have until 8:33, then it's late.
Define the following using mathematical/science definitions:
distance
displacement
Describe the similarities between distance and displacement by creating a Venn diagram
We will discus the warm up later today
Period 1 CLASSWORK
1. P1: Review Quiz (5min)
2. Data for Plotting Graphs (30 minutes)
- your homework was to finish the graphs.
- Use your data and the instructions provided in the handout to create graphs on Google Sheets. Your completed graphs are due on Google Sheets, shared to me via a link in the Classroom, by 9:20am today.
3. Distance vs. Displacement (20 min)
a. discuss your Venn diagrams
b. Nearpod --> nearpod.com - use your actual name so I can give you credit - code is: XDWPJ
Period 1 HOMEWORK:
Nearpod www.nearpod.com - use your actual name so I can give you credit - code is: XDWPJ
Distance vs. Displacement Video (LINK), questions, notes (LINK)
Practice problems. Chapter 1 (link to the textbook is in the left margin), pg 24-28: 33, 36, 37, 38a, 44,
46 (answer is either linear or inverse), 51, 59, 60, 67, 87
+ a few more problems
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Period 5 #Goals: SWBAT...
1. create a graph using Google Sheets
2. Describe the similarities between distance and displacement
Period 5 Warm-Up: (5minutes)
The temperature drops from 24*C to 10*C in twelve hours.
a. find the average temp change per hour
b. predict the temp in 2 more hours if the trend continues.
c. could you accurately predict the temp in 24 hours?
Period 5 CLASSWORK
1. HW Review
2. Data for Plotting Graphs (30 minutes)
- Use your data and the instructions provided in the handout to create graphs on Google Sheets. Your completed graphs are due on Google Sheets, shared to me via a link in the Classroom, by 9:10am today.
3. Distance vs. Displacement (20 min)
a. discuss your Venn diagrams
b. Nearpod --> www.nearpod.com - use your actual name so I can give you credit - code is: RNUDB
Period 5 HOMEWORK:
Practice problems. Chapter 1 (link to the textbook is in the left margin), pg 24-28: a few problems
Complete Nearpod
Next class: velocity vs. speed; vectors vs. scalars
Thursday, August 25th, 2016
#Goals:
1. Describe the advantages of a long interval and/or a short interval
2.
WARM-UP:
Imagine you work for the Dept of Transportation, and you're in a helicopter above a freeway:
1. What data would you need to find the speed of a vehicle traveling on the freeway in this photo?
2. EXPERIMENT DESIGN: You know the distance from the beginning of one line line (the dashes) to the beginning of the next line is 10m.
a. How could you use that bit of information to find the speed of a car?
b. What other info would you need?
c. Imagine you have the choice to either use a short distance interval from one line to the very next line, or a long interval from one line to another that is 10 lines away? What would be the advantage of using the long interval?
READING/NOTES:
Measurement and Significant Figures
Every measurement has a certain amount of guessing built into it. Scientists call this the uncertainty of the measurement. If you were trying to measure the volume of a cup of water, and your hand was shaking, your measurement might be close to the real volume of the cup, but might be uncertain by seven or eight drops of water.
The instruments we use for measurement have uncertainties built into them. Consider the following picture.
If you measure the piece of wood in the picture using ruler A you might say it is longer than 4 and less than 5. You could guess how far between and say the piece of wood is 4.9 long. If you make the same measurement using ruler B you would be able to say that the piece of wood is between 4.8 and 4.9 long. You could guess that the piece of wood is 4.85 long. Your guess with ruler B has an extra decimal place of accuracy. Which ruler gives a more precise measurement?
The number of decimal places in a measurement is called the number of significant digits. Significant digits include all the numbers that were definite and one number that is a guess. You will be expected to use all the instruments to the maximum precision when making measurements.
Independent and Dependent Variables
Science is the process of comparing things. Astrophysicists compare the light from distant stars to see what elements make them up. Mechanical engineers compare the position of a car to several different times to determine its velocity and acceleration. In each case the scientist is trying to determine if one variable influences the other.
The best way to compare most variables is to graph them. In the case of the car, the scientist is interested in how much the position of the car depends on the amount of time which has passed. The less time that passes as the car changes position, the faster the car is. In this case, the position is considered the dependent variable. The position is what we are measuring to see if it is affected by time. The time is considered the independent variable. We are going to look at several different times and see where the car is at those times. The best way to determine which variable is which is to ask the question, "Does _________ depend on ________?" Usually, one of the two ways to write the sentences make more sense.
Time
We will have several different methods for measuring time. One will involve using your eyes and taking individual points with your phone. Another will involve taking a video and using the playback to record data points.
Observations: Qualitative vs. Quantative
Qualitative
Deals with descriptions.
Data can be observed but not measured.
Colors, textures, smells, tastes, appearance, beauty, etc.
Qualitative → Quality
Quantative
Deals with numbers.
Data which can be measured.
Length, height, area, volume, weight, speed, time, temperature, humidity, sound levels, cost, members, ages, etc.
Quantitative → Quantity
Graphing and Best Fit Lines
When graphing variables, the independent variable is always plotted on the x-axis and the dependent variable on the y-axis. In physics, it is often useful to create an equation for the slope of the line based on the graph. For today's lab we will be expecting a straight line, so the equation should be of the form
y = kx + b
This means that the dependent variable, y, will be equal to a constant, k, multiplied by the independent variable, x, and added to another constant, b. If scientists can consistently derived these equations, they can use them to predict the behavior of the universe.
LAB: Exploring Objects in Motion
0. Split your groups in half and work in pairs/triplets. One lab report due per half group. Use two computers, one for each group half
1. Read the entire lab, so you know exactly what to do. Ask questions if you have them.
2. On your lab report (use your own lined paper or make a Google Doc at docs.google.com), complete all sections starting at Procedure and finishing with Conclude and Apply. Don't forget to label each section of your lab, number and answer each question, and fill in that data table :-)
3. Lab reports are due at the end of the period.
Homework: