Variables and Scientific Method
Unit Conversions
Dimensional Analysis
Graphing
Scientific Notation
100
Fill in the blank:
The scientific method is a _____ process that scientists use to answer questions and solve problems
Fluid
100
Using the mnemonic device provided in class, give me the prefixes in order
BE EXACT IN YOUR DELIVERY OF YOUR ANSWER!!!!
Mega...
Kilo
Hecto
Deka
Unit Base
Deci
Centi
Milli...
Unexpectedly/Mysteriously
100
The following example gives you the start to a dimensional analysis problem. The goal is to turn yards into feet. Where will the yards go in the next ratio to make sure we correctly set up our problem?
35 yd ft
Next ratio: 1 yd/3ft
Bottom of the fraction bar (in the demoninator)
100
What are three absolutely necessary and crucial parts of any graph
Titles
Labels
Scales
Keys
100
What sign would the exponent have for the following number, and how many decimal jumps would be necessary?
0.00073
Negative Exponent
4 jumps
200
This variable is the variable that is measured in the experiment.
Dependent variable
200
32 m into cm
3200 cm
200
40,400 mm into ft
Round to the nearest whole number
133 ft
200
In the graph below, answer both of these questions:
- What is one way the setup of this graph could be improved?
- According to the infograph, what age group drinks the most energy drinks?
1.) No labels OR provide more info on type of energy drink
2.) 10-18 Year Olds
200
What's the purpose of using scientific notation?
To condense really long numbers into a more readable format. This practice saves space on papers and time when relaying results from a study.
300
List the steps of the scientific method in order
Observe, Hypothesize, Experiment, Collect/Analyze Data, Conclude
300
15,000 ms into das
1.5 das
300
72 mi/hr into km/hr
Round to the nearest whole number
116 km/hr
300
From the graph below, state the independent variable and the dependent variable
Independent= Country
Dependent= Percent of people owning phone
300
Convert 8.24x106 into extended notation
8,240,000
400
A botanist (someone who studies plants) wants to study the effects of different liquids on plant growth.
For the experiment, the botanist decides to feed the plants water, pineapple juice, and Dr. Pepper. The botanist gives the same amount of each liquid to 3 different plants and measures their height after 2 weeks.
Identify the independent variable, dependent variable, and controlled variable in this experiment.
Independent= Type of Liquid
Dependent= Height of Plant
Control= Amount of Liquid
400
0.881 ML to L
881,000 L
400
11.25 L into fluid ounces
NEEDED RATIO NOT ON THE BOARD:
1 cup= 8 fluid ounces
Round to the nearest whole number
381 fl oz
400
For the following four scenarios, which type of graph would be the best to use to present the data?
- How much of a worker's paycheck was spent on groceries, how much was spent on gas, how much was spent on entertainment, how much was spent on utilities, etc.
- The amount of rainfall each month for a year
- The number of A's, B's, C's, D's, and F's on Mr. Cline's recent weekly quiz
- The ethnicity breakdown in PSHS
1.) Pie
2.) Line
3.) Bar
4.) Pie
400
Convert 0.000000000000000000000000000000000000000001 into scientific notation
1x10-42
1.00x10-42
500
Explain why it is important for scientists to have controlled variables AND provide an example of an experiment where not having a controlled variable would affect the experiment.
Controlled variables are necessary because changing more than one variable at a time makes it difficult to figure out which variable affected the results.
Example experiments will vary.
500
915 µg into kg
Then turn this number into scientific notation
0.000000915
9.15x10-7
500
45 mi/hr into m/s
Round to the hundredths place
20.16 m/s
500
The graph below shows the change in gun ownership from the years of 2000-2020.
Choose two of the spikes in gun ownership and attempt to give a THOROUGH explanation of why these spikes can be seen.
1st Spike= Obama election...a president's policies on gun ownership can determine the amount of guns bought
2nd Spike= Sandy Hook Shooting...parents and guardians fear for the safety of their children mixed with patriotism
3rd Spike= Coronavirus...general population spends a lot more time at home and wants to ensure safety.
500
Count the number of spheres hanging from Mr. Cline's ceiling. Convert this number into scientific notation.
78
7.8x101