46 True/False questions

three basic dimensions → kilogram

method error can be greatly reduced by _________ the method of taking measurements → standardizing

light → optics

motion and its causes, interactions between objets → 7

specific types of repetitive motions → electromagnetism

those digits in a measurement that are known with certainty plus the first digit that is uncertain → certain  uncertain

base unit of time → kilogram

electricity, magnetism, and light → electromagnetism

particles moving at any speed, including very high speeds → mechanics

the description of what kind of physical quantity is represented by a certain measurement is called ________ → dimension

______ _____ ______ estimates can also be used to estimate numbers in situations in which little information is given → orderofmagnitude

zeros in front of nonzeros are ________ → not significant (ex. 0.892 has 3 significant figures)

behavior of submicroscopic particles → mechanics, thermodynamics, vibrations and wave phenomena, optics, electromagnetism, relativity, quantum mechanics

heat and temperature → second

measurements of physical quantities must be expressed in units that match the ________ of that quantity → dimensions

zeros that are at the end of a number and also to the right of the decimal are _________ → significant (ex. 50.3 has 3 significant figures)

physical quantities that can be described as a combination of length, mass, and time (the three basic dimensions) → method error

to make expressions as simple as possible, physicists often use ______ to describe specific quantities in an equation → letters

measurements used in calculations should have the same _____ → not significant (ex. 0.892 has 3 significant figures)

how many SI base units are there? → 7

poor _______ involves errors that can often be corrected → accuracy

many of the models currently used in physics are ________ models → mathematical

a common convention used in science to indicate precision is known as ________ _________ → significant figures

physicists use the tools of mathematics to describe measures or pre directed relationships between _______ ________ in a situation → models

an experiment that tests only one factor at a time by using a comparison of a control group with an experimental group → controlled experiment

a pattern, plan, representation, or description designed to show the structure or working of an object, system, or concept → round the final answer to the first column from the left containing an estimated digit

significant figures rule for multiplication and division → round the final answer to the first column from the left containing an estimated digit

base unit of mass → second

a set of particles or interacting components considered to be a distinct physical entity for the purpose of study → system

significant figures rule for addition and subtraction → final answer has the same number of significant figures as the measurement have the smallest number of significant figures

zeros between other nonzero digits are ________ → not significant (ex. 0.892 has 3 significant figures)

base unit of length → meter

during an experiment if some measurements are taken using one method, and some are taken using another method ______ _______ will result → method error

the description of how much of a physical quantity is represented by a certain numerical measurement → dimension

an explanation that is based on prior scientific research or observations and that can be tested → hypothesis

7 major areas of physics → kilogram

physicists often use _______ to explain the most fundamental features of various phenomena → models

a numeric measure of confidence in a measurement or result is known as ________ → uncertainty

SI uses ________ to accommodate extremes → second

although each dimension is unique, a dimension can be measured using different ______ → precision

the degree of exactness of a measurement → precision

significant figures are the ones that we know for ______, as well as the first digit that is ________ → certain  uncertain

a description of how close a measurement is to the correct or accepted value of the quantity measured → accuracy

in scientific notation, the measurement is recorded to a power of 10, and all of the figures given are _________ → significant

in an experiment to test a hypothesis, you must change _____ _______ at a time to determine what influences the phenomenon you are observing → one variable

a lack of _______ is typically due to limitations of the measuring instrument and is not the result of human error or lack of calibration → precision