Module 2 Flashcards
Anything that has mass and takes up volume & examples
Matter
ex. water, air, wood, metal, air in a balloon, human body, stone
The study of matter and its changes.
Chemistry
What refers to the simple components that make up the material?
Composition
What refers to both the composition and arrangement of those simpler substances?
Structure
Give examples of what composition vs structure is.
A deck, canoe, baseball. All are composed of wood, but they are structured differently to serve different functions
What are the fundamental units of matter?
atoms
How are atoms represented?
colored sphered, a one or two lettered symbol, or a combination of the two.
a tentative explanation of observations that acts as a guide for gathering and checking information
OR
a possible explanation for something we observe, used to guide further investigation and testing.
hypothesis
______ of science summarize a vast number of experimental observations, and describe or predict some facet of the natural world.
OR
rules that sum up many experiments and help explain or predict how things in nature work.
law
If such a hypothesis turns out to be capable of explaining a large body of experimental data, it can reach the status of a _____
OR
If a hypothesis can explain a lot of data, it can become a ________
law
well-substantiated, comprehensive, testable explanations of particular aspects of nature are?
OR
strong, proven explanations of certain parts of nature that can be tested are?
scientific theories
are accepted because they provide satisfactory explanations, but they can be modified if new data become available.
theories
The path of discovery that leads from question and observation to law or hypothesis to theory, combined with experimental verification of the hypothesis and any necessary modification of the theory is?
OR
The process of moving from a question and observation to a hypothesis, then testing it through experiments, and updating the theory based on the results is?
scientific method
Curiosity and observation can lead to the formation of a
hypothesis
If data obtained during experimentation supports a hypothesis, the hypothesis can become a
theory
If the data discounts the hypothesis, what may be done?
The hypothesis may be revised or changed.
A summary of numerous experimental observations is called a ____
law
what is the term for close a measurement is to the value or the target
or
how close you are to the correct/accepted value?
accuracy
refers to how consistent or repeatable your measurements are, regardless of whether they are close to the true value. If your shots are all landing in the same spot, but not necessarily near the bullseye, they are precise but not accurate.
What is the term for how consistent or repeatable your measurements are, regardless of whether they are close to the true value
Precision
Examples of precision and accuracy:
Your shots hit the bullseye every time
accurate & precise
Examples of precision and accuracy:
Your shots all land in the same spot, but that spot is far from the bullseye
Precise but not accurate
Examples of precision and accuracy:
Your shots hit the bullseye once in awhile, but they spread out across the target
accurate, but not precise
Examples of precision and accuracy:
Your shots are scattered all over the target, far from the bullseye
Neither accurate nor precise
What term refers to the digits in a number that are important for showing its precision. These include non-zero digits, any zero digits, any zeros between them, and any trailing zeros in a decimal number
significant figures
What term is a number with a unit/system attached
measurement
what is the amount of matter in something?
its mass
What is the amount of space an object, liquid, or gas takes up
Volume
SI unit of length
meter (m)
SI unit of mass
kilogram (kg)
SI unit of time
second (s)
SI unit of electric current
ampere
SI unit of thermodynamic temperature
Kelvin ( K )
SI unit of amount of substance
mole (mol)
SI unit of luminous intensity
candela (cd)
