# PHYS 200 Unit 1: The Nature of Science and Physics

### Description

Athabasca University PHYS 200 Unit 1
Flashcards by Adriana Vincelli-Joma, updated more than 1 year ago
 Created by Adriana Vincelli-Joma over 1 year ago
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## Resource summary

 Question Answer Theory -explains patterns in nature -supported by scientific evidence -verified by various groups of researchers Law -describes generalized pattern in nature -supported by scientific evidence and repeated experiments SI (Systeme International) units international system of units that scientists agreed to use Units for time -second -minute (60 sec) -hour (60 min, 3600 sec) Unit for length -millimeter -centimeter (10 mm) -meter (100 cm, 1000 mm) -kilometer (1 x 10^6 mm, 1 x 10^5 cm, 1000 m) Unit for mass -gram -kilogram (1000 g) accuracy degree to which measured value agrees with correct value precision degree to which repeated measurements agree with each other uncertainty quantitative measure of how much measured values deviate from standard or expected value %unc (unc A)/A x 100% significant figures express precision of measuring tool used to measure value method of significant figures last digit written down in measurement is first digit with some uncertainty sig fig in calculations -sig figs in final answer cannot exceed sig figs in least precise measurement

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