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01 Introduction PS

Prentice Hall Explorer - Chapter 1

QuestionAnswer
Science This is a way of learning about the natural world by gathering information.
Observing This means using one or more senses to gather information.
Qualitative Descriptions These descriptions are descriptions that dont involve numbers or measurements.
Quantitative Observation. This observation is an observation made with numbers or measurements.
Inferring This is explaining an observation based on reasoning from what you already know. EX: ( six people see a fight and they all report a slightly different viewpoint).
Predicting This means making a forecast of what will happen in the future based on past experience or evidence.
Chemistry This is the study of the properties of matter and how matter changes.
Physics This is the study of matter and energy and how they interact.
Scientific Inquiry This refers to the different ways scientists study the natural world.
Hypothesis This is a possible answer to a scientific question or explanation.
Manipulated Variable This variable is the variable that is changed on purpose during an experiment.( It's what you are testing.)
Responding Variable This variable is the variable that is expected to change because of the manipulated variable. You will measure it during the experiment.
Controlled Experiment This experiment is where all variables are kept the same except for one.( The manipulated variable). ex: soil,water,type of plant.
Data These are facts, figures and other evidence gathered through observation.
Communicating This is sharing ideas and conclusions with others through writing and speaking.
Scientific Law This is a statment that describes what scientists expect to happen every time under a particular set of conditions. It is no longer tested.
Scientific Theory This is a well tested explanation for a wide range of observations or experimental results. It is still tested and subject to change. The world is flat.
Technology This is a way of changing the natural world to meet human needs or solve problems.
Engineer This is a person who is trained to use both technological and scientific knowledge to solve practical problems.
Brainstorming This is a process in which group members freely suggest any creative solutions that come to mind.
Constraint This is any factor that limits or restricts a design. Can't test everyone so we test a sample.
Trade Off This is an exchange in which one benefit is given up in order to obtain an other.
Prototype This is a working model that is used to test a design that an engineer comes up with.
Trouble shoot This is the name given to when you analyze a design problem and find a way to fix it.
System This includes a goal,input,process,output, and sometimes feedback.
Variable This is the name given to anything that can cause a change during an experiment.
precision Refers to how close a group of measurements are to each other.
accuracy Refers to how close a measurement is to the true or accepted value.
estimate Scientist must sometime rely on ___ when they cannot obtain the exact number.
random Measurements that are neither precise or accurate are said to be __.
significant figures In a measurement , they include all of the digits that have been measured exactly, plus one digit whose value has been estimated.
two I am certain of 5 in the ones column but am estimating 3 in the tenths column so my ___ has one exact figure and one estimated one for a total of 2 significant figures which is 5.3