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Physical Science Final
review
43
Science
9th Grade
01/19/2012

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Cards

Term
Steps for naming an ionic compound
Definition
1. say metal
2. remove suffix from non metal
3. add "ide" to new suffix
4. Say together
Term
Steps for naming a covalent compound
Definition
1. 1st element with prefix
2. Add "ide" as new suffix, with prefix
Term
Number Prefixes
Definition
1. mono
2. di
3. tri
4. tetra
5. penta
6. hexa
7. septa
8. octa
9. nona
10. deca
Term
how much is 1 mole of a substance
Definition
6.02 * 10^23
Term
Symbol for Alpha particle
Definition
He2+
Term
Symbol for Beta Radiation
Definition
e-1
Term
Symbol for Neutron Emission
Definition
n
Term
Elements above this atomic number are naturally radioactive
Definition
83- Bismuth
Term
Elements above this atomic number are naturally radioactive
Definition
83- Bismuth
Term
What can happen to a lone neutron?
Definition
it splits into a proton and electron
Term
What is transmutation
Definition
the changing of an element due to radioactive emissions
Term
What is Fission
Definition
When a radioactive substance decays and the amount of the product is less than the amount of the reactants
Term
What is fusion
Definition
When a radioactive substance decays and the amount of the product is more than the starting amount
Term
What is a critical mass
Definition
the amount of a radioactive substance needed to produce a chain reaction
Term
What is the equation for energy
Definition
energy=(mass)*(speed of light)^2
Term
What is it called when a substance has exactly no KE
Definition
absolute zero
Term
What is the equation for converting Celsius to Kelvin
Definition
Celsius+273=kelvin
Term
What is the First Law of Thermodynamics
Definition
Whenever heat flows into or out of a system, the gain or loss of thermal energy equals the amount of heat transferred
Term
What are the three types of heat transfer and how do they differ?
Definition
conduction-objects make contact
convection- circular motion of hot and cold in a fluid
radioaction- electro magnetic energy
Term
What is the second law of thermodynamics
Definition
Heat always transfers from hotter objects to cooler objects unless acted upon by another force
Term
What is the 3rd Law of Thermodynamics
Definition
No system can reach absolute zero
Term
What is the difference between a motor and a generator?
Definition
motor- converts electricity to movement (fan turning)
generator-converts movement (fan turning) to electricity
Term
What is the equation for calculating heat energy of a substance
Definition
Heat energy= kg*specific heat*change in temperature
Term
What is specific heat?
Definition
The property of a substance that shows how much energy is required to change 1 kg of that substance by 1 degree
Term
What unit is heat energy measured in
Definition
jules
Term
What is the major difference between a mechanical and electromagnetic wave?
Definition
mechanical- requires medium to travel through
electromagnetic- can go through vacuums
Term
Example of mechanical wave
Definition
sound
Term
Example of electromagnetic wave
Definition
light
Term
Two types of mechanical waves and their differences
Definition
Transverse- the wave moves perpendicular to the direction of the energy (spring)
Longitudinal- the wave moves parrallel with the direction of the energy
Term
What is rarefaction and compression
Definition
occurs in longitudinal waves, rarefaction is the rarity of a wave due to stretching and compression is the squeezing together of part of a wave
Term
What is a wave
Definition
energy
Term
what is amplitude
Definition
the distance from a mid point to crest of a wave
Term
What is a wavelength
Definition
the distance from one wave crest to another
Term
What is the equation for frequency and its unit?
Definition
Frequency= 1/period
Term
What is the equation for wave speed
Definition
frequency * wavelength
Term
What is the period
Definition
the time it takes to complete a vibration
Term
What is the frequency of sound
Definition
pitch
Term
Equation for period of a wave
Definition
frequency * wavelength
Term
Why does the same pitch on different instruments not sound the same?
Definition
Every central pitch resonates background pitches in multiples of two, every instrument has different intensitys of these multiples
Term
What are nodes?
Definition
the point where crests and troughs cancel each other out/ cross over on a wavelength
Term
Why do we see lightning before we hear thunder?
Definition
Velocity of light is significantly greater than the velocity of sound
Term
Two types of interference?
Definition
constructive- crest to crest/trough to trough
destructive- crest to trough
Term
Why are tsunamis so small in deep water and then jack up in shallow water?
Definition
because in deep water the amplitude of the crest is tiny because the wave length is so long, but then the shallow water causes the wave to move upwards and increases the amplitude
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