Chemistry > QUESTIONS & ANSWERS > UT Online High School Chemistry A Final Exam Thorough Review 2022 with complete solution (All)

UT Online High School Chemistry A Final Exam Thorough Review 2022 with complete solution

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UT Online High School Chemistry A Final Exam Thorough Review 2022 with complete solution Accuracy >>>>how close a measurement is to the true value dependent variable >>>>changes in response to the independent variable (what you measure in an experiment and what's affected during the experiment) Hypothesis >>>>a proposed explanation for an observation Independent variable >>>>(often denoted by x) doesn't depend on something else Scientific notation >>>>how scientists handle large or small numbers Significant Figure >>>>all the nonzero digits of a number and the zeros that are included between them or that are final zeros and signify accuracy SL unit for mass >>>>based on meter, kilogram, second, ampere, kelvin, and mole w/ set of prefixes to indicate multiplication or division by a power of ten Theory >>>>well-supported explanation that's been repeatedly tested Aristotle >>>>laid the foundation for science (constructed an explanation for his observations of falling objects)(only made logical assumptions from observations) Galileo >>>>tested his theories (T/F) Science cannot prove anything 100% >>>>(true) science cannot prove anything 100% Science >>>>Process that follows rules/procedures to answer questions about the natural world How many new experiments does it take to disprove a theory? >>>>It takes one new experiment to disprove a theory The scientific method is an ___ process >>>>The scientific method is an ONGOING (or fluid) process Scientific Method Steps >>>>Observe, hypothesis, test hypothesis, make conclusion, report result precision >>>>How close two measurements are to each otherWrite 7.7847 * 10^4 in standard notation w/ 2 sig figs >>>>78,000 Write 7.4 * 10^-2 in standard notation w/ 2 sig figs >>>>0.074 Physical properties >>>>associated w/ characteristics of molecules that can be tested w/out changing the chemical make-up of compounds (magnetism, boiling point, melting point, color, taste) (T/F) Decomposition is considered a physical change >>>>False, decomposition is a chemical change because molecules are changing Chemical change >>>>Chemical reaction, chemical makeup is changed Physical change >>>>When a substance's physical form is changed

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