Unit 1 How Scientists Work Flashcards
triple beam balance
a tool used to measure mass in grams
graduated cylinder
a tool used to measure volume of liquids in milliliters; usually a more accurate measurement
thermometer
a tool used to measure the temperature in degrees Celsius
meter stick
a tool used to measure distance or length in millimeters, centimeters, meters, or kilometers
spring scale
a tool used to measure force in Newtons
hand lens
a tool used to observe objects closely
hot plate
a tool used to add heat to materials
stopwatch
a tool used to measure time in seconds, minutes, hours, etc.
prism
a glass bar that separates white light into the colors of the rainbow; an example of how light can refract.
safety tools
lab apron, gloves, goggles, fire blanket, fire extinguisher, eye wash station
hypothesis
an educated guess; an idea that can be tested by an experiment or an observation
variable
any factor that can change in an experiment (one thing changes, everything else stays the same)
data
the pieces of information collected in an investigation
trial
a repeat of a test or observation; the more you do, the more you can trust the data that you collect
trial
a repeat of a test or observation; the more you do, the more you can trust the data that you collect
conclusion
tells what an investigation showed you; must be based on your observations and data you collected.
bar graph
shows the same kind of data for different things; used to compare data
line graph
shows how data changed as time passed; the shape tells you whether something increased, decreased, or stayed the same.
inference
an explanation that you figure out without actually observing something yourself
beaker
a tool used to measure the volume of liquids; not as accurate typically
experiment
a scientific investigation that tests a hypothesis
model
a picture, idea, or object that represents an object or process
observation
the act of careful watching and listening; the activity of paying close attention to someone or something in order to get information
procedure
the steps that you follow in an experiment
centimeter
unit of measurement for length (small)
gram
unit of measurement for mass (small)
milliliter
unit of measurement for volume (small)
terrarium
a glass or plastic box that is used for growing plants or keeping small animals indoorss
disposal
to throw something away
waft
a safe way to smell things by fanning air toward your nose
analyze
to study (something) closely & carefully; to learn the nature & relationship of the parts of (something) by a close & careful examination
classify
to arrange (people or things) into groups based on ways that they are alike; to sort
