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The final project
science flashcards
114
Science
9th Grade
06/22/2013

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Term
what is the scientific method?
Definition
A series of steps to solve or approach a problem
Term
What are the steps to the scientific method?
Definition
Observation
Question
Research
Experiment
conclusion
Term
Observation
Definition
Recognizing the problem
Term
Question
Definition
Ask a question that is related to the experiment
Term
Research
Definition
Finding more information than you know to advance you experiment
Term
Experiment
Definition
Testing the question in a series of repeating steps
Term
Conclusion
Definition
The ending result of the experiment in which you answer your question
Term
What is a controlled experiment?
Definition
A controlled experiment is a experiment when you have something constant going on to see change
Term
Independent variable
Definition
The one factor in the experiment that is being changed
Term
Dependent variable
Definition
The factor in the experiment that is being measured
Term
What causes the seasons to change?
Definition
The earth rotating on Its 23.5° axis
Term
What is solstice and equinox?
Definition
Solstice is the point when both poles are not facing the sun equinox is the half way point between the solstice
Term
Autumal
Definition
September21
Term
Vernal
Definition
March 21
Term
What is aphelieon and perihelion?
Definition
Aphelieon is when the earth is far from sun -summer
Perihilieon is when the earth is close to the sun-winter
Term
What shape is the solar system?
Definition
Elipse
Term
Speed
Definition
How fast an object moves
Term
Velocity
Definition
How fast an object moves in a certain direction
Term
Rotation
Definition
The earth spinning on its 23.5° axis usually take a day
Term
Revolution
Definition
The earths journey around the so usually takes a year
Term
Acceleration
Definition
Change in velocity and in time
Term
Inertia
Definition
The risistance to change in motion. Objects with bigger made have more inertia than small ones
Term
Parallax
Definition
The apparent position of a background when Viewed from different points of view
Term
Astronomical unita
Definition
Average distance between the earth and the sun
Term
Light year
Definition
The measurement of distance it takes light to travel in a year
Term
Redshift
Definition
Red- wave length of light
Shift- gallixy moving away from earth
Term
Big hang theory
Definition
States that the earth began 13.7billion years ago
Term
What was Aristotles theory?
Definition
Aristotle's theory states that our universe is a geocentric form
Term
What was Hubbles theory?
Definition
Hubble's theory stated that the universe was expanding
Term
What was Galileos theory?
Definition
Galileo's theory stated that any object of any size or weight would fall at the same rate
Term
Geocentric
Definition
The theory stating that Earth is the center of our universe
Term
Heliocentric
Definition
The theory stating that the sun is the center of our universe
Term
What was Hawking theory?
Definition
The big bang theory
Term
How to convert 3.1x10^7 into scientific notation?
Definition
move the decimal over 7 times to equal 31,000,000
Term
What are all the SI metric units?
Definition
Kilometer,Hectometers,Dekameter,Base units,Decimeter,centimeter,millimeter
Term
What is an exanpleof physical change?
Definition
Freezing water
Term
What is a example of chemical change?
Definition
Dissolving salt
Term
What is a mixure?
Definition
A combination of pure substances physically changed
Term
What is a pure substance?
Definition
Matter that had fixed composition and definite propeerties
Term
What are the famnilies on the periodic table?
Definition
Alkali metals,alkali earth metals,transition metals,halogens,metalloids,nobble gases
Term
What are componds?
Definition
Pure substances that are put together to make a element
Term
What is needed for a eclipes to happen?
Definition
Sun,moon,earth,umbra,penumbra
Term
How will the sun change as it ahead?
Definition
It will get dull
Term
How old is the universe?
Definition
13.7billion years ago
Term
Newton's 1st law
Definition
An object at rest will stay at reat unless acted on by an unbalanced force and an object in motion will stay in motion unless acted on by an unbalanced force
Term
Newton's 2nd law
Definition
The acceleration of an object is directly propotional to the net force acting upon it
Term
Newton's 3rd law
Definition
For every action there is an equal but opposite reaction
Term
Matter
Definition
Any thing that had made or volume or takes up space there are 5 states
Term
Heterogenous
Definition
A mixure that you can see different particals of the substances
Term
Homogeneous
Definition
A mixure that you can't see the different partical
Term
Solute
Definition
In a solution the substance that dissolves
Term
Solvent
Definition
In a solution the substance in which the solute dissolves
Term
Solution
Definition
A homogeneous mixure throughout which two or moe substances are uniformly. Deersed
Term
What are the parts of solution?
Definition
Solvent and solute
Term
What are 3 ways to dissolve a solute?
Definition
Change the temperature,change the surface area, and the pressure
Term
What two things are elements on the periodic tanker aranged by?
Definition
Fammilies Android groups
Term
How many galaxies are there in our universe?
Definition
About one hundred billion
Term
Friction
Definition
A force that opposes motion between two surfaces that are in contact
Term
Melting point
Definition
The temperature and pressure at which a solid becomes a liquid
Term
liquid
Definition
Term
Freezing point
Definition
The temperature and pressure at which a liquid becomes a solid
Term
Non metal
Definition
An element that conducts hear and electricity poorly and that does not form positive ions in an elecrolytic solution
Term
Boiling point
Definition
The temperature and pressure in which a liquid becomes a gas
Term
Metal
Definition
An element that is shinny and that conducts heat and electricity well
Term
Solid
Definition
firm,hard, and tightly packed
Term
liquid
Definition
flowing like water
Term
Gas
Definition
freely flowing like air
Term
net force
Definition
total amount of force
Term
Super nova
Definition
An explosion in the stars that is the reason why gravity came into existence
Term
Suspension
Definition
A temporary unablety
Term
density
Definition
d=m/v compactness
Term
Pulsar
Definition
the theory that a neutron star is rapidly rotating
Term
Elliptical
Definition
form of ellipse
Term
Evaporation
Definition
when a liquid becomes a gas
Term
retrograde
Definition
moving backwards
Term
Atom
Definition
tiny little partical that makes up elements
Term
molecule
Definition
the smallest physical unit in an element or compound
Term
red giant
Definition
large star with lots of volume but small surface area
Term
metalloid
Definition
An object that has some metal characteristics and some non metal characteristics
Term
Electrons
Definition
A particle found in an atom with a negative charge
Term
Protons
Definition
A particle found in an atom with a positive charge
Term
Neutrons
Definition
A particle found in an atom with a neutral charge
Term
Mendeleev
Definition
Creator of the periodic table
Term
Newton
Definition
Creator of newtons 3 laws of motion
Term
Ions
Definition
An atom that has gained or lost an electron
Term
Atomic number
Definition
The number of proton in an atom
Term
Mass number
Definition
The sum of a number of protons and neutron
Term
Periods
Definition
A horizontal row of elements on the periodic table
Term
What is the speed of an object at rest?
Definition
0m/s
Term
What is it called if the slope on a graph is negitive?
Definition
Deacceleration
Term
Slope
Definition
Rise over run
Term
Democritius
Definition
Had an atomic theory but did not have any evidence
Term
Dalton
Definition
Atoms cannot be seperated
Term
Cathode
Definition
A negitive charge
Term
Anode
Definition
A positive charge
Term
Thompson
Definition
Theory that atoms are not visible and have a negitive charge
Term
Rutherford
Definition
Theory that most of the atoms mass is in the center
Term
Bohr
Definition
Theory that electrons went in a path around the nucleus inside the atom
Term
Orbital
Definition
A path outside of the nucleus where the electrons are located
Term
Groups
Definition
The vertical colums on the periodic table
Term
Periodic table
Definition
A list of all the known elements
Term
Alkali metals
Definition
Extremely reactive not found in nature and are silver and shiny
Term
Alkaline earth metals
Definition
Lightly reactive silver
Term
Transition metals
Definition
Good conductor and are shiny range of reactivity
Term
Lanthanides and actinides
Definition
Transition metals are located at the bottom of the periodic table
Term
Valence electrons
Definition
Electrons found in the outer most shell of the molecule
Term
Aalkali metals
Definition
Soft shiny very reactive elements
Term
Alkali earth metals
Definition
Hard shiny less reactive than alkali metals
Term
Noble gas
Definition
Unreactive gas foormed elements
Term
Noble gas
Definition
Unreactive gas foormed elements
Term
Halogen
Definition
Most reactive gases
Term
Ionic bond
Definition
Whenn one ion takes or borrows some electrons from another. Ion
Term
Ionic bond
Definition
When one ion takes or borrows some electrons from another ion
Term
Polar bond
Definition
When 3 ions combine aat the ppoles of the element
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