Shared Flashcard Set

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Second semester final review
Review cards
51
Science
9th Grade
05/28/2013

Additional Science Flashcards

 


 

Cards

Term
what are the three main types of clouds
Definition
Stratus, Cumulus and, Cirrus
Term
What kinds of weather does each type of cloud predict or bring
Definition

Cummulus is fair weather

 Stratus brings overcast weather and drizzle

Cirrus is fair weather and points in wind direction

Term
`What is the relationship between air temp, dew point and humidity?
Definition
Relative humidity changes when temperatures change. Because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air.
Term
Clouds will appear when the air temperature is equal to
Definition
Dew point
Term
Compare and contrast the terms climate and weather
Definition

Weather is the current temperature

Climate is the typical temperature for a certain place over a period of time

Term
What variables define climate of a region
Definition
How how the summers are and how cool the winters are and for how long each season is.
Term
Describe the water cycle
Definition
The cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration
Term
What is a front? What two factors make a front
Definition
Alternate bands of warmer and colder air move around the planet in parallel, at different latitudes. When air from one of these bands pushes into an adjoining one, the wavy interface between the two air masses is called a front
Term
Tell the difference between a cold air mass and a warm air mass. What type of weather and clouds does each bring
Definition
Classifying this air mass can be done in terms of temperature and humidity.If you take temperature,then it can be classified as a warm air mass or cold air mass.In terms of humidity,they can be called as continental or maritime air masses.
If a colder air mass actively displaces a warmer air mass at the surface, then it is called as a cold front.That means cold fronts bring cold air into warm areas.In such a condition,the warm air is forced to move upwards resulting in the formation of a low pressure area or depression.
Term
What does an isobar and isotherm measure
Definition
Isobars and isotherms are lines on weather maps which represent patterns of pressure and temperature
Term
Explain the differences between the terms continental, maritime, polar and tropical. What types of air masses do these make and where do they originate from
Definition
The Difference of CT and MT Continental Tropical air mass is more hot and dry, and forms over water. Maritime Tropical is more warm and moist and forms over land.
Term
How is thunder and lightning formed
Definition
Lightning is a flash of light created by electric discharge. It is extremely bright for a brief moment in time even at great distances Thunder is created by a rapid expansion of air.
Term
What characterisitics are needed to form a thunderstorm
Definition
 moisture, unstable air and lift. You need moisture to form clouds and rain. You need unstable air that is relatively warm and can rise rapidly. Finally, you need lift. This can form from fronts, sea breezes or mountains.
Term
When do most thunderstorms, tornadoes or, hurricanes form
Definition
During the season in which each of these has the best temperatures and pressure for each storm to occur
Term
How do hurricanes form and how are they categorized
Definition

Hurricanes form when easterly and westerly winds meet over tropical oceans, such as the Pacific and Atlantic

theyre categorized by the wind speed and how much destruction they can cause from 1-5

Term
What are the basic ingredients for a hurricane to form
Definition
Having two opposing winds colliding to form one very fast wave
Term
How are tornadoes formed and categorized
Definition
The first thing that has to happen is that you have to have two different patches of air moving toward each other from opposite directions, with a warm one on the bottom and a cool one on the top. The next thing that happens is that the warm air rises. (You may have learned about hot air rising in school.) After the warm air goes up, the cool air comes down to take its place. So now the warm and cool patches of air are moving side to side and up and down. So they make a spinning patch of air along the ground. Theyre categorized by wind speed and the damage they do
Term
What type of air masses are needed for a tornado to form
Definition
Cold and warm
Term
Which direction does wind tend to turn in the northern and southern hemisphere
Definition
To the right
Term
what characteristics are needed to cause a blizzard
Definition
Cold air (below freezing) is needed to make snow.2. Moisture is needed to form clouds and precipitation. 3. Warm, rising air is needed to form clouds and cause precipitation. 
Term
Where does most of our energy come from
Definition
Petroleum
Term
Explain what happens to the earth when excess fossil fuels are burned
Definition
The fumes are put into the ozone layer and tear holes in it allowed more harmful U-V rays in and heating up our earth to an unhealthy temperature
Term
Compare and contrast kinetic vs potential energy
Definition
Kinetic is energy that is in use currently or in motion. Such as a ball that has been thrown. Potential is energy that is being stored for use later such as a ball being rolled off a table before it falls.
Term
List and describe the 5 main types of energy
Definition
 Mechanical, thermal energy, nuclear energy, chemical energy and electromagnetic energy.
Term
How can energy be transfered from source to source
Definition
un, source of solar energy. It transfers thermal (heat) and light energy to plants, humans and animals.
Term
What is nuclear fission and what does it create?
Definition
A nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy. It creates nuclear power
Term
what is the law of conservation of matter
Definition
 a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system.
Term
What is the differerence between renewable and nonrenewable resources
Definition
Renewable is a resource that will never be gone nonrenewable is once its been used it can never be used again.
Term
How does combustion occur
Definition
Generally organic molecules are heated up until they become vapor. The vapor rises to the flash point and ignites or combines chemically with oxygen. That exothermic reaction raises the temperature which causes more organic compounds to vaporize. That increases the size of the flame and heat. The smoke is the vapor. Fire is the ionized gas or plasma. 
Term
What are the types, formation and sources of fossil fuels
Definition
  1. crude oil, 
  2. natural gas and 
  3. coal.  
  4. Plants and animals that have been sunk into the soil can be used as a recource. Deep in the earth. 
Term
Types of alternative energy sources
Definition

Wind power

solar power

geothermal power

water power

 

Term
A set of electric trains are powered by a 20 V battery. What is the resistence of the trains if they draw 10 A of current?
Definition
2
Term
Draw a parallel and series circuit with the following symbols: 2 light bulbs, one switch, and 2 dry cells.
Definition
[image]
Term
Conductor
Definition
A material or object that conducts heat
Term
Neutron
Definition
Center and basis of an atom with a neutral charge
Term
Voltage
Definition
How many volts a current has in it
Term
Ohm
Definition
The SI unit of electrical resistance, expressing the resistance in a circuit transmitting a current of one ampere when subjected to a potential difference of one volt
Term
Current
Definition
A flow of electricity which results from the ordered directional movement of electrically charged particles
Term
Rift valley
Definition
A large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface between nearly parallel faults or fault systems
Term
Epicenter
Definition
  1. The point on the earth's surface vertically above the focus of an earthquake
     
Term
Dew point
Definition
The atmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form
Term
Stratus
Definition
Cloud forming a continuous horizontal gray sheet, often with rain or snow
Term
Cirrus
Definition
Cloud forming wispy filamentous tufted streaks (“mare's tails”) at high altitude, usually 16,500–45,000 feet (5–13 km)
Term
Nonrenewable
Definition
A non-renewable resource is a natural resource which cannot be produced, grown, generated, or used on a scale which can sustain its consumption rate
Term
Joules
Definition
The SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves one meter in the direction of action of the force, equivalent to one 3600th of a watt-hour
Term
Insulator
Definition

A substance that does not readily allow the passage of heat or sound

- cotton is a poor insulator

Term
Proton
Definition
A stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign
Term
Coulomb
Definition
The SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere
Term
Volt
Definition
The SI unit of electromotive force, the difference of potential that would drive one ampere of current against one ohm resistance
Term
Static
Definition
(of an electric charge) Having gathered on or in an object that cannot conduct a current
Term
Asthenosphere
Definition
The upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur
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