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Midterm Review
What I need to know for Intro to Chem and Physics
63
Physics
10th Grade
01/17/2011

Additional Physics Flashcards

 


 

Cards

Term
KINETIC THEORY OF MATTER
Definition

1. All matter is made up of atoms and molecules that act like tiny particles

2. These tiny particles are always in motion

3. The higher the temperature of a substance, the faster the particles will move

4. At the same temperature, more massive particles will move slower than less massive particles

Term
Archimedes Principle
Definition
The buoyant force on an object in a fluid is an upward force = to the weight of the fluid the object displaces
Term
Bernoulli's Principle
Definition
As the speed of a fluid increases the pressure of that liquid decreases
Term
Pascal's Principle
Definition
A change in pressure at any point in an enclosed fluid will be transferred equally to all parts of the fluid
Term
What is Science?
Definition
The knowledge gained from observing, stuyding and experimenting to find the nature of things
Term
Life Science
Definition

The study of any living things

ex. Biology, Zoology, Ecology, and Botony

Term
How can earth and physical science affect eachother?
Definition
*The Sun's energy affects plants, and people

*How planets rotate

Term
Earth Science
Definition

The study of nonliving things

ex. weather, universe, planets and space

Term
Physical Science
Definition

The study of matter and energy

 

(branches into chemistry and physics)

Term
Chemistry
Definition
The study of the changes of substances and how they're made
Term
Physics
Definition
The study of energy and forces: the movement of substances (friction)
Term
How does Physics relate to Life Science?
Definition

Sports- made up by Physics

Changing of Substances=digestion

Term
How do Life Science, Earth Science, and Physical Science relate to one another?
Definition
You can't just study one branch, they all work together and intertwine
Term
Pure Science
Definition

Knowledge for the sake of it

(how? why? what?)

ex. knowing the phases of the moon

*trivial knowledge*

Term
Applied Science
Definition

aka. technology

The use of pure science to make our lives easier

 

ex. ipad- compact computer-holds more for less space

Term
How is science found?
Definition
*Discovered beceause of curiosity
-What is wrong here?
-Why does this happen?
-Why is this not working?
Term
Critical Thinking
Definition

Reasonable, reflective, responsiblel and skillful thinking that is focused on deciding what to believe or do

(thinking/reevaluating the situation)

Term
Scientific Method
Definition
Organized steps to solve a problem or answer a question
Term
Steps of the Scientific Method
Definition

1.Observe the situation, research and form a ?

2.Develop and form a hypothesis

3.Test the hypothesis(perform a controlled experiment

4.Analyze the data- What does it mean?

5.Draw conclusions

Term
Qualitative Observations
Definition

Observing quality (describe)

 

*think QUALITY*

Term
Quantitative Observation
Definition

Observing # or amount (measurement)

 

*Think QUANTITY*

Term
Scientific Theory
Definition
An explanation for some event based on observation, experimentation and reasoning (tells you why)
Term
Scientific Law
Definition

Describes how things work based on experiments and observations

(tells you how)

Term
Theory vs. Law
Definition

They BOTH

*allow predictions to be made

*have experiments that can be repeated

Term
Measurement
Definition
Has a # and a unit
Term
Metric System
Definition

System of units used worldwide so scientists can easily share data with eachother

*latin of the science world

Term
Base Unit
Definition

A standard for measurement, has a value that everyone knows

 

ex. meter- from doorknob to floor

Term

length- ?

mass- ?

time- ?

temperature-?

electric current-?

quantity-?

luminous intensity-?

Definition

length-meters (m)

mass- kilograms(kg)

time-seconds(s)

temperature-Kelvin(K)

electric current-ampere(A)

quantity-mole(mol)

luminous intensity-candela(cd)

Term
Derived Units
Definition
Combination of base units
Term
Analysis
Definition

*Understanding your data

*Besides understanding graphs, sometimes one must understand the measurements or calculations

Term
Accuracy
Definition

How close something is to a target or goal

 

(ex. archery)

Term
Precision
Definition
How close data is to a set of measurements
Term
Significant Figures
Definition

aka SigFigs

A way to tell how precise #s in a measurement are

Term
Rules for determining Significant Figures
Definition

1. all non-0 #s are significant (any #1-9)

2.0's at the end of a # will only count if theres a decimal point

3.0's in the beginning of a # never count

4.0's between non-0 #s always count

Term
Scientific Notation
Definition
An easier way to write a really large or really small #
Term
Matter
Definition
Anything that has a mass and takes up space
Term
Element
Definition

*a substance that can't be broken down, already in lowest form possible

*basis for all creation

*made up of only one type of atoms

Term
Atom
Definition
The smallest unit of an element that acts like that element
Term
Periodic Table (of Elements)
Definition

*Made up of 118 elements currently

*Each represented by a chemical symbol

Term
Chemical Symbol
Definition
1 or 2 letters that are used to represent the name of the element. First letter is uppercase, second is lowercase
Term
Compound
Definition
A substance made up of two or more different elements that are chemically combined
Term
Chemical Formula
Definition
Ratio of Atoms in a compound
Term
Molecule
Definition
The smallest part of a compound
Term
Pure Substance
Definition
A substance of matter that has a definite chemical & physical property (one substance only)
Term
Mixture
Definition
A combination of 2 or more pure substances that are not chemically combined with no set ratios or amounts
Term
Heterogeneous Mixture
Definition
CAN see the differences in the mixture
Term
Homogeneous Mixture
Definition

Substances are mixed equally, can't see any separation

 

aka solution

ex. iced tea, lemonade, air

Term
Suspension
Definition
When particles fall out/settle into the mixture
Term
Colloid
Definition

Particles are suspended but they can reflect light

 

ex. jello, pudding, mayo, smog/fog

Term
Physical property
Definition

Any characteristic or trait that describes the substance without changing the identity of the substance

(height,color,shape,mass,volume,

odor,texture,melting/boiling point, strength, hardness, ability to conduct electricty or heat or density)

Term
Density
Definition

How much matter is contained in a certain volume of a substance

-looking @ how tightly the atoms are packed together

-used to determine buoyancy

-derived unit

Term
To SOLVE Density!
Definition
Density= Mass/Volume
Term
Chemical Property
Definition
Describes how a substance reacts
Term
Liquid
Definition
Anything that flows or moves freely
Term
Pressure
Definition
The amount of force on a given area
Term
Buoyant Force
Definition
Upward forces that exert on matter placed in that fluid[image]
Term
To determine whether an object shall float or sink...
Definition

Buoyant Force > Weight of Object = Float

Buoyant Force < Weight of Object = Sink

Buoyant Force = Weight of Object = Object Suspended midliquid

Term
Shape and Buoyant Forces
Definition

Sphere-Less area for buoyant Force to act upon,float

Cyllinder-more force exerted on sides,sink

Term
Temperature
Definition
Average movement of the particles
Term
Thermal Energy
Definition

aka heat

total movement of all of the particles (needs to know mass)

Term
Venturi Effect
Definition
Fluids flow faster when moving through narrow surfaces
Term
Viscosity
Definition

Resistance of a fluid to flow

(ex. when a container of liquid is tilted to allow flow to begin, the flowing particles will transfer energy to the stationary particles)

Term
Viscosity Flowing w/ Liquids
Definition

High Viscosity- low flow, thick

Low Viscostiy- high flow, thin

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