Finale
Hypothesis
A confident, testable statement is known as a.....
does NOT receive the IV
A control group is defined as
Exothermic
A cooling curve represents an ______________ process
Scientific Law
A description of observations/experiments without explaining WHY.
Temperature
A graph shows Energy on the y axis and Temperature on the x axis. What the independent variable?
solvent, (aq)
A solution containing the _____ water is noted in a chemical reaction using what symbol??
1500 oC
According the heating curve, the MP for Iron is...
Tentative
According to the tenents, the nature of science is....
163.8 cm^2
Alexis measures a piece of aluminum foil (density of aluminum is 2.7 g/cm^3) in attempts to accurately determine its thickness. She measures the edges of the foil to be 12.9cm and 12.7cm and its mass to be 0.71g. What is the area of the foil according to her calculations?
.00159 cm
Alexis measures a piece of aluminum foil (density of aluminum is 2.7 g/cm^3) in attempts to accurately determine its thickness. She measures the edges of the foil to be 12.9cm and 12.7cm and its mass to be 0.71g. What is the foil's thickness?
0.26 cm^3
Alexis measures a piece of aluminum foil (density of aluminum is 2.7 g/cm^3) in attempts to accurately determine its thickness. She measures the edges of the foil to be 12.9cm and 12.7cm and its mass to be 0.71g. What is the volume of the foil?
Liquid
Ammonia is a compound whose MP is -77.7 degrees C and whose BP is -33.4 degrees C. What state of matter is ammonia at -50 degrees C?
decreases, convection
As with air, the paraffin wax in lava lamps rises because its density _____ and we watch the heat flow as beautiful _____ currents.
False
Baseline data is gathered before an experiment for the control group only.
Accuracy
Comparison of the EV to the AV is the definition of..
Inductive
Copernicus' noted and recorded pieces of data regarding the location/movement of planets in the sky in relation to the sun over many years and build-up his Theory of Heliocentrism which eventually caused a paradigm shift. The creation of his theory represents __________ reasoning.
AV
David is trying to figure out the boiling point for ethanol. He does some research on the internet. Wikipedia indicates that ethanol boils at 78.1 degrees Celsius and pubchem.ncbi.nlm.nih.gov indicates that ethanol boils at 78.29 degrees Celsius. Both of these numbers represent a/an ...
pubchem.ncbi.nlm.nih.gov
David is trying to figure out the boiling point for ethanol. He does some research on the internet. Wikipedia indicates that ethanol boils at 78.1 degrees Celsius and pubchem.ncbi.nlm.nih.gov indicates that ethanol boils at 78.29 degrees Celsius. Which boiling point is formal?
False
Density depends on the amount of a sample
True
Energy and heat are measured with the same unit?
Element
Fluorine gas (F2) is a/an
Vapor, volatile
Gasoline, nail polish remover, and alcohol are liquids at room temperature that evaporate easily into _____ because they are _____.
symbolic
Graphing represents the ____________ corner of Sirhan's Triangle.
Pyrex
Heat safe glass is called...
Nuclear energy
Hydrogen and Helium on/in the sun represent...
EV < AV
If you forget to take the absolute value in determining %Error and have a negative value, that means that the
Heat
If you wanted to determine enthalpy by graphing data and determining slope, what variable would be plotted on the y axis?
Speed of light
In Einsteins equation E=mc^2, the "c" represents..
True
In order to test for nocebo/placebo effects, a fake or inert treatment (sugar/salt) must be given to the control group.
If exposed to SugarControl, then blood glucose will decrease
In our Experimental Design with Diabetes Data LAB, the hypotheses was ...
Qualitative
Indicating that the temperature of the room is warm is an example of a _____ measurement.
Potential
Intermolecular forces (IMFs) represent _________ energy
False
Invisible means unobservable
Volume
Joel is attempting to confirm the density of water. He is manipulating the volume of water and measuring the resulting mass. What is the independent variable?
mass
Joel is attempting to confirm the density of water. He is manipulating the volume of water and measuring the resulting mass. Which variable would be on the Y axis?
Qualitative
Julia did well on her Chemistry quiz. The statement represents a ____________ measurement.
Quantitative
Julia earned a 92.5% on her chemistry quiz. This statement represents a ________________ measurement.
True
Language and chemistry are similar as they both show that the only thing permanent is change.
Quantitative
Lavoisier pushed for science to be based on ___________ measurements.
Conclusion
Making a _______ is when you accept or reject your hypothesis
experimental pressure
Manometers are tools used to measure
Testing
Many words and processes are associated with science; however, at the heart of what makes science science and differentiates it from religion and philosophy is ...
Solutions
Metal ALLOYS such as steel, bronze, pewter are
Mixtures
Most of the substances surrounding us are....
National Fire Protection Agency
NFPA diamonds are on all MSDSs. NFPA stands for
False
Observing only occurs at the beginning of scientific thinking.
Radiation
Of the three types of heat transfer, which describes how heat moves from the sun to us on earth?
Precise but inaccurate
Often instruments are not both accurate AND precise, so if you have to choose just one combination, is it better to have and instrument that is..
Are building blocks
Paradigms are like elements in that they
Indirect methodology
Ryan calculates the diameter of BBs using a combination of measurements he made and formulas. His problem solving procedure represents a/an
His experiment is inconclusive
Sam conducted an experiment to see if teenagers (his friends) drinking orange juice in the morning would be less sleepy. He gave 10 of his friends 250mL of OJ yesterday before homeroom and then at lunch asked them to complete a survey on their sleepiness during the morning. His results: none of his friends indicated they were sleepy. What can Sam conclude?
problem/question
Scientific thinking begins with a _________ to be solved or answered
True
The NoS is based on creativity
precise
The amazing LAB group #4 is attempting to determine the density of water. Analysis of their graph and calculations provides following densities: 0.9777 g/mL, 0.9358 g/mL, 0.9358 g/mL, and 0.9593 g/mL. The density of water is known to be 0.9971 g/mL at 25 degrees Celsius (room temperature). Considering a percent difference of less than or equal to 5%, the group is...
Accurate
The amazing LAB group #4 is attempting to determine the density of water. Analysis of their graph and calculations provides following densities: 0.9777 g/mL, 0.9358 g/mL, 0.9358 g/mL, and 0.9593 g/mL. The density of water is known to be 0.9971 g/mL at 25 degrees Celsius (room temperature). Considering a percent error of less than or equal to 5%, the group is...
4.4%
The amazing LAB group #4 is attempting to determine the density of water. Analysis of their graph and calculations provides following densities: 0.9777 g/mL, 0.9358 g/mL, 0.9358 g/mL, and 0.9593 g/mL. The density of water is known to be 0.9971 g/mL at 25 degrees Celsius (room temperature). What is the %D?
4.5%
The amazing LAB group #4 is attempting to determine the density of water. Analysis of their graph and calculations provides following densities: 0.9777 g/mL, 0.9358 g/mL, 0.9358 g/mL, and 0.9593 g/mL. The density of water is known to be 0.9971 g/mL at 25 degrees Celsius (room temperature). What is the %E?
0.9971 g/mL
The amazing LAB group #4 is attempting to determine the density of water. Analysis of their graph and calculations provides following densities: 0.9777 g/mL, 0.9358 g/mL, 0.9358 g/mL, and 0.9593 g/mL. The density of water is known to be 0.9971 g/mL at 25 degrees Celsius (room temperature). What is the AV?
0.9522 g/mL
The amazing LAB group #4 is attempting to determine the density of water. Analysis of their graph and calculations provides following densities: 0.9777 g/mL, 0.9358 g/mL, 0.9358 g/mL, and 0.9593 g/mL. The density of water is known to be 0.9971 g/mL at 25 degrees Celsius (room temperature). What is the average EV for the group?
technology
The application of scientific knowledge for practical, industrial purposes; providing society with needed and desired tools defines ....
Sublimation
The bottom of the Y on a phase diagram, represents which curve?
True
The comic shows the definition of paradigm shift because the chick hatched from the egg and will have a radical change in how he/she perceives and thinks.
whether or not bonds are formed/broken
The difference between chemical and physical changes is mostly due to
An interaction has occurred between two substances (types of matter)
The difference between chemical and physical properties is whether or not
BC
The enthalpy of fusion is represented by which line
Proust
The law of definite proportions was proposed by...
chemical change: precipitate
The picture above shows the formation of a yellow solid when 2 clear liquids mix. What occurred in the beaker?
More than that
The pressure at the top of Mount everest is 33.7 kPa. Normal pressure is __________
Empirical evidence
The royal society's motto, "Nullius in Verba" (take nobody's work) indicates that they valued _________
False
The temperature of substance increases a lot when it is melting.
Specific heat capacity and density
The two physical properties involved in the workings of a lava lamp are
False
The word "prove" should be used instead of "support" to communicate the results of experiment or the development of new theories.
False
There are two elements named after two states of matter. They are elements 100 and 101.
Fusion
This graph shows how adding a solute to a solvent shifts curves on a phase diagram. The two leftmost curves are called
True
Tony records the temperatures of rooms on the second floor of MAHS and records the following results: 22.3oC, 23.6oC, 22oC, 23oC, 32.4oC, 22.7oC, 23.5oC His data shows an outlier.
Law of definite proportions
Two samples of a similar rock are found. Sample A has 5.0 g of Mg and 3.3 g of O. Sample B has 6.5 g Mg and 4.8 g O. In order to determine if the two samples are the same, the _____________ is used.
joules/gram
Units for enthalpy of fusion for water?
validity
Various PIs around the country question the procedure of a newly published study. The PIs are questioning the __________ of the study.
Material Safety Data Sheet
What does MSDS stand for?
degrees Celsius
What is the units for boiling point of alcohol?
Triatomic compound
What is true about the product?
Watts
What units for power of a light bulb?
False
When a chemical interaction results in effervescence, one can infer that the reaction was exothermic.
Deposition
When frost forms on a car windshield in the winter, it shows chemistry in action by allowing us to see (slowly overnight) the process of ____________.
DV v IV
When graphing, how should the title be written?
Invalid instruments & unreliable instruments
Which of the following are NOT sources of error in experiments as discussed in your notes and in class? (select all that apply)
Electromagnetic
Which of the following is NOT a form of Potential energy?
It is a synonym for energy
Which of the following is NOT true regarding POWER.
Is my number right?
Which of the following questions applies to accuracy?
Do I get the same result every time?
Which of the following questions applies to precision?
Do different people in different places at different times get the same results?
Which of the following questions applies to reliability?
Is the test testing what it's supposed to test?
Which of the following questions applies to validity?
all of these answers represent CHEMICAL ENERGY
Which of the following represents CHEMICAL ENERGY
Paradigms
______ are the framework for shaping our thinking and perceptions, thus are also the building blocks of thought
Scientific Theories
________ tend to weaken with the passage of time and advances in technology.
enthalpy required to melt
⚠Hfus
enthalpy required to boil
⚠Hvapn
boiling point elevation
⚠Tb
freezing point depression
⚠Tf
