the two main branches of science are
natural and social sciences
what is not a branch of biology
geology
the main branches of natural science are
life, physical and earth science
technology can best be defined as
applied science
pure science is best defined as
continuing search for new knowledge
what do scientists who do pure science do
they do experiments to find out about the world
a scientific theory is an explanation that
has been tested by many observations
for a scientific theory to be valid, it must be allow you to
perform experiments
a scientific model is a
representation of a real event or object
scientific theories can be changed or replaced when
new discoveries are made
a series of logical steps is folowed in order to solve a problem is called the
scientific method
scientists use computer models to study complicated events and to
make predictions
the first step in the scientific method is usually
forming a hypothesis
scientists test a hypothesis by
doing experiments
what does it mean to say that "no experiment is a failure
all experiments involve manipulating variables
which instrument has been used to detect the oldest, most distant objects in the solar system
radio telescope
what question cannot be answered by an experiment
did a comet impact and kill the dinosaurs
the si unit for measuring temperature is the
kelvin
what is the prefix in si units for 1 million
mega
what is the si prefix for one onehundreth
micro
a (distance) is needed to understand the number value of measurement
false- unit
the scientific community worldwide uses (english syatem) units
false-international system
distance is measured in units of (length)
true
a method of using conversion factors and unit cancelling to solve a unit conversin problem is called (significant digits)
false- dimmensional analysis
(accuracy) refers to the smallest interval that can be measured
false- resolution
(percision) describes how reproducible repeated measurements are
true
if th edifference between results is much larger than th estimated error the results are called(significantly different)
true
the volume of an object is the (space) taken up by the object
true
your body would have the same (weight) if you were on earth, the moon and jupiter
false- mass
the mass of an old penny is about 3.3 (kilograms)
false- grams
the relationship between mass and volume of an object is its (weight)
false- density
the (density) of a material is the same no matter what the size or shape of the material
true
a (graph) is a visual representation of data
true
in an (inverse) relationship one variable decreases when another variable increases
true
the information you collect in an experiment in order to answer a qeustion is called (evidence)
true
(natural law) is the process of learning that starts with asking questions and proceeds by seeking the answer to the questions
false- inquiry
the water temperature of a pond measured with a thermometer would be considered (objecive) scientific evidence
true
to (deduce) an answer means to figure out an answer by using logical thinking
true
(inquiry) is the process of leraning by asking questions
true
scientific theories are (always) being tested by experiments
true
(objective) evidence describes only what actualy happened as exactly as possible
true
if scientific evidence disproves a scientific theory than the theory must be (strong)
true
a (variable) is a prediction that can be tested with an experiment
false- hypothesis
(control) variables are those that are changed in an experiment
false- experimental
the unit of length that most neatly matches the width of your finger is the
centimeter
what is the order of units from smallest to largest
milli, centi, meter, kilo
what two parts does a measurement have
value and unit
hwy are si units used so often in science
si units are more accurate than english system units
the mass of a large paper clip is about the same as
1 gram
the converting factor for changing 1 unit of length to another in metric sysem is a multiple of
10
what is not a unit of distance
newton
what is the unit of time most often used by scientists
seconds
what is an example of a quantity of time
1 year
how many centimeters are in a stick 3 meters long
300cm
how many seconds are in 3 days
259,200 seconds
what best represents a moment in time
a movie that runs 122 minutes
how many econgds are in a stopwatch during 4hours, 3 minutes and 10 sec
14,590 seconds
dimmensional analysis is used to
convert nits
what is the value of a factor ratio
1
when you convert a measurement from si to lengths what changes
errors
laines schooldy measured 6h 15min. how many minutes longer was it
375min