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Sciece Chapter 1

Chapter 1
STUDY
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Scientific methods
are organized ways to answer questions and solve problems
hypothesis
is a possible answer to your questions
evidence
observations and facts gained from experiments
2-dimensional
describe objects that have length and width but not height
3-dimmensional
describe objects that have length, width and height
inference
is a conclusion drawn from data and observations
procedure
is a step by step instructions on how to perform a test
investigation
is a careful way of looking for something
inquiry
process of asking questions and searching for answers
tool
is an object or device used to perform a task
Scientist
first study what other scientist have already learned about the answers to thier questions.
observations are made
with senses and tools
Research study references
encylopedias books, magazines or journals, Interent and more.
Telescope
to help you see objects that are far away
thermometer
to measure temperature
computer
to anaylsis data
microscopes
use several lenses to make objects appear much larger
safety
Read activity carefully,clean work area,
scientific methods include
experiments, observations, survey, and sampling
variables
things that change
independent variable
is the thing that you changed
dependent variable
the thing you must measure or observe
controlled variable
the things you keep the same
models
are objects or ideas that represent other things
procedure
keep records , organize your data, presenting data(bar or line graph)
bar grqph
uses rectangular bars to compare data
line graph
connect points of data on a graph with straight lines
line graphs
are used to show patterns of data over time.
reasonable answer
should not favor one opinion over another unless its supported by evidence.
Technolgy
is the knoledge, process, and products that solve problems and make life easier
science and technology
solve problems with health, transportation, construction, communication.
technology
helps sciencist and others extend their senses(hearing, seeing, touch)