Variables & Methods of Science
Explain the difference between accuracy and precision.
Accuracy: how close a measurement is to its "true" or "perfect" value.
Precision: how well-grouped or consistent multiple measurements are to each other.
What piece of personal protective equipment is mandatory if we are doing a physical lab?
Lab Goggles
What is the formula for density?
density = mass รท volume
How many centimeters are there on a meter stick?
100 cm
What is Mr. Landes' first name?
Grant
What is the main motivation for scientific research most of the time?
MONEY
What are the two types of glassware? Name an example of each.
Volumetric (graduated cylinders, volumetric flasks, volumetric pipettes, etc.) and Non-Volumetric (beakers, Erlenmeyer flasks, test-tubes, etc.)
Convert 7.8 * 10^9 back to standard notation (must walk through answer on whiteboard)
7,800,000,000
(a.k.a. 7.8 billion)
What 2 temperature units are primarily used in Chemistry?
Celsius and Kelvin
What breed is Mr. Landes' beloved dog, Maeve?
Black Lab or Black Lab mix
Explain the difference between the 3 types of variables.
Independent: the variable that scientists directly manipulate/change.
Dependent: the variable that changes as a result of what we did to the independent variable.
Control: the variable(s) that we keep constant so that our results are not unintentionally altered.
What must be done before measuring mass on a digital scale?
You must zero/tare the scale.
What are the three things that can occur based on an object's density when placed into a liquid (i.e. what happens when the object is more dense, less dense, or equal in density to the liquid)?
Higher density = sink
Lower density = float
Same density = suspended in the liquid
Convert 1200 mL to kL. Must show work on the whiteboard using the fence method.
0.0012 kL
If Mr. Landes is going to drink an energy drink, it almost always has to be _________.
Sugar-free, zero-sugar, or low sugar
Jessica tells James that he is acting like a bad boyfriend because he is a Scorpio. She is referencing astrology, which is an example of what type of "science"?
Pseudoscience
What piece of equipment should be used to move hot glassware (such as beakers or flasks)?
tongs or rubber grabbers
If I have a 10-gram sample of Iron and a 1-kilogram sample of Iron, how do their densities compare?
They have the same density regardless of the amount because they are the same substance.
How do derived units differ from base SI units?
Derived units are some combination of multiple SI units (ex: m/s, m^3, kg/L, etc.)
How many countries has Mr. Landes been to outside of the US? (double points if you can name all of them)
5 (UK, Ireland, Netherlands, Germany, & Belgium).
What makes observations different from inferences?
We make observations during experiments based on what we see, smell, feel, hear, etc., whereas we make inferences after the experiment based on the data that we gathered in an attempt to explain why something happened.
Besides a fire extinguisher, what can you use to put out a fire in Chemistry lab?
The Fire Blanket (Located next to Mr. Landes' desk)
What is -0.00006007 in scientific notation? (Must walk through your answer on the whiteboard)
-6.007 * 10^-5
Convert 32 hours into centiseconds. Must show work on the whiteboard with the fence method.
1.152 * 10^7 or 11,520,000
If Mr. Landes was to live in another country besides the US, where would he want to live? (hint: there are 2 possible answers. One is in Europe, the other is in Asia. Double Points if you can name both).
Poland or Japan