notes quiz Flashcards
a reasonable explanation (testable)
hypothesis
a series steps that tests a hypothesis
experiment
what the scientist changes (can be time) ex: the juice given to the workers in simpson WS
independent variable
changes due to the independent variable ex: the productivity of the workers in the simpsons WS
dependent variable
a group that is held constant; the norm ex: the workers not given the juice in simspns
control group
info gathered during an experiment
data
summary of the scientists findings; refers back to the hypothesis
conclusion
a summary or description of general principal s found throughout science (summaries)
scientific laws
an established hypothesis proven to be true by multiple experiments by many scientists (explanations) **THEY ARE JUST AS TRUE AS LAWS
scientific theories
units of ten
metric system
measures length and uses meter stick =100 cm
meter
measures mass and uses a balance
gram
measures volume use graduated cylinder
liter
measures temperature use thermometer
celcius
1/100th or .01
centi
1/1000 or .001
milli
multiplication of 1000
kilo
how close to the true value you are
accuracy
how close your measurements are to each other
precision
reminder:
ALWAYS READ BETWEEN THE LINES!!! - your value is always 1 decimal further than the measuring tool shows
_____ is a derived measurement
density
D=m/v ex: 40.0g/20.0mL= 2.0 g/mL
distance equals mass divided by volume
higher density will _____
lower density will _____
sink; float
water has a density of ___ g/mL
1.0 g/mL anything or below will float, anything over or at 1.0 will sink
a group of related sciences that deal with the planet earth and its neighbors in space
earth science
science that examines earth, its composition and changes its undergone and undergoing
geology
the study of weather and climate
meteorology
study of water systems on earth
hydrology
the scientific study of the universe
astronomy
study of interactions between living and non living things in an environment
environmental science
all of water on earth (71%)
hydrosphere
thin blanket of air surrounding earth
atmosphere
region of earth where life is found- includes portions of other 3 spheres
biosphere
mostly solid portion of earth lying below atmosphere and hydrosphere
geosphere
our solar system is found on a spiral ___ in the ____ ___ galaxy
arm; milky way
earth is divided into 2 hemispheres: _____ and _____
north and south
the distance north and south from the equator measured in degrees (horizontal line)
latitude
the distance east and west of the prime meridian measured in degrees (vertical lines)
longitude
___ is always listed first
latitude
lines of latitude are …
69 degrees apart
prime meridian
imaginary vertical line that separates earth in two parts
equator
imaginary horizontal line that separates earth in 2 parts
