WGU C165 Integrated Physical Science Questions and Answers Already Passed

WGU C165 Integrated Physical Science Questions and Answers Already Passed physics the study of forces, energy, motion Chemistry study of atoms and molecules, their structures, and their interactions to form various substances. Earth Science Earth's structure and composition, as well as the processes that change Earth, such as volcanic and seismic activity. astronomy The study of the moon, stars, and other objects in space Science An organized way of gathering and analyzing evidence about the natural world. Precision a measure of how close a series of measurements are to one another SI is a scientific method of expressing the magnitudes or quantities of important natural phenomena. There are seven base units in the system, from which other units are derived. Universal for comparing data. physical science the sciences concerned with the study of inanimate natural objects, including physics, chemistry, astronomy, and related subjects. life science the study of living things controlled experiment An experiment in which only one variable is manipulated at a time. Or a condition that is being held constant independent variable what is being changed dependent variable what is being measured control In an experiment, the standard that is used for comparison Observational experiment or study studies attempt to understand cause-and-effect relationships. However, unlike experiments, the researcher is not able to control (1) how subjects are assigned to groups and/or (2) which treatments each group receives. ... Therefore, a sample survey is an example of an observational study. field study a research investigation carried out in a naturally occurring setting laboratory study Research done in a laboratory Physical Model A physical representation of an object. Prototypes and appearance models are physical models. conceptual model a verbal or graphical explanation for how a system works or is organized mathematical model one or more equations that represent the way a system or process works Hypothesis A testable prediction, often implied by a theory Theory A hypothesis that has been tested with a significant amount of data. Explains why something happened. Law A law in science is a generalized rule to explain a body of observations in the form of a verbal or mathematical statement. Scientific laws (also known as natural laws) imply a cause and effect between the observed elements and must always apply under the same conditions. Explains how it happened not why. Observation Information obtained through the senses. evidence proof Data Facts and statistics collected together for reference or analysis Big Bang Theory Cosmological model that explains the sudden development of the universe through expansion from a hot, dense state. plate tectonics A theory stating that the earth's surface is broken into plates that move. atomic theory a theory that states that all matter is composed of tiny particles called atoms. gram a metric unit of mass equal to one thousandth of a kilogram. meter The meter is the basic unit of length in the SI system of units. ... The previous definition of the meter was one ten-millionth of the distance from the geographic north pole to the equator, measured over the earth's surface in a circle running through Paris, France. second SI base unit for time Celsius Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100. Kelvin The SI base unit of temperature liter Basic unit of volume in the metric system Metric Prefixes Giga, Mega, Kilo, deci, centi, milli, micro, nano derived unit A unit defined by a combination of base units direct relationship a relationship in which one variable increases with an increase in another variable inverse relationship a relationship in which one variable decreases when another variable increases Speed The distance an object travels per unit of time Velocity Speed in a given direction Acceleration the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change distance The length of a path between two points Displacement Distance and direction of an object's change in position from the starting point. Balance force Equal forces acting on one object in opposite direction. These forces then give a 0 net force, causing the object to stay in place. unequal force unbalanced forces cause a change in motion; speed. and/or direction. When two forces act in the same direction on an object, the net force is. equal to the sum of the two forces. When two unequal forces act in opposite directions. net force The combination of all forces acting on an object Newton's First Law An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Mass the amount of matter in an object Inertia The tendency of an object to resist a change in motion Newton's Second Law Force equals mass times acceleration Newton's Third Law For every action there is an equ