chapter 1
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Chapter 1. The World of Physical Science. What is Science?. __________ is a process of gathering knowledge about the natural world. Can you give some examples of sciences?. Science. Life. Earth and Space. Physical. What is Physical Science?. - PowerPoint PPT PresentationTRANSCRIPT
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Chapter 1The World of Physical Science
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What is Science?» __________ is a process of gathering knowledge about
the natural world. » Can you give some examples of sciences?
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Science
Life Earth and Space Physical
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What is Physical Science?» Physical science is the study of _______ and ________.
˃ Matter is made up of atoms and has both a _________________. ˃ ________ is the ability to do work.
» The branches of physical science˃ __________˃ __________
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Chemistry » Chemistry is the study of all forms of matter, including
____________________________ ____________» Chemistry looks at the ___________and __________ of
matter.
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Physics» __________ looks at energy and how that energy affects
matter. » Motion, force, gravity, electricity, light, and heat are
parts of physics.
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What are the “steps” of the Scientific Method?
» The scientific method are the ways in which scientists answer questions and solve problems.
1. 2. 3.4.5.6.7.
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Steps of the Scientific Method1) Observation
˃ __________________________________˃ ______________ – color, odor, taste, etc.˃ ______________ – measurements.˃ Instruments used:
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Steps of the Scientific Method2) Ask a question
3) Hypothesis˃ An explanation that is based on prior scientific research or
observations and can be tested. ˃ If – then statement.
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Steps of the Scientific Method
4) Testing the Hypothesis – Experiment˃ A ______________ compares the results from a control group
with the results from the experimental groups. The groups are exactly the same except for one factor. That factor is the ____________.
˃ ______________ is the variable you change.+ Ex. Time
˃ _______________ changes in response to the independent variable.
+ Ex. Distance
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Steps of the Scientific Method » 5) Collect, Record, and Analyze Data
˃ __________ is the information gathered through your experiment.
˃ All information needs to be recorded in a notebook, in a data table or other recording devices.
˃ ____________ material makes analyzing the data easier.
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Steps of the Scientific Method
6) At the end of the investigation, you ________________________˃ Accept or reject ˃ Change your hypothesis and retest.
7) Communicate results˃ How can you do that?
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Theory vs. Law» A _________ is an
explanation for many hypotheses and observations.
» ________________» Can predict future results.» Can not be proven 100%» Examples
˃ ˃
» A _____ is a summary of many experimental results and observations.
» Laws are ___________ and do not change.
» Examples ˃ Newton’s Laws˃ Conservation of Mass
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Measurements» Length
˃
» Volume˃
» Mass˃
» Temperature˃
» Density˃
» Time˃
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Prefix Symbol Factor of Base Unit
kilo-
hecto-
deka-
BASE
deci-
centi-
milli-
Metric Measurements Prefixes
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Metric Conversions» K H D __ d c m
˃ 1378 millimeters = ________ dekameters
˃ 45 centimeters = ________ decimeters
˃ 4 liters = ________ hectoliters
˃ 5 kilograms = ________ grams
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Scientific Notation» A way to express very small or very large numbers» Example:
˃ 12345 = 1.2345 x 104
˃ 0.00456 = 4.56 x 10-3
__________ – must be between 1 and 9
_________
____________ – the # of times the decimal was moved
(+) to the left
(-) to the right
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Scientific Notation» 56934=
» 1280 =
» 0.0345 =
» 0.0000037 =
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Scientific Notation» 2.347 x 10-3 =
» 8.98736 x 104 =
» 3.48763 x 10-4 =
» 5.7654 x 105 =
Reverse it!
(+) right
(-) left