question

Ohms Law:

answer

Opposition to the flow of current.

question

Pharynx

answer

further filters the air and aids in protections against infection

question

Phenotype

answer

genes that express themselves in physical characteristics ex: eye color

question

Genotype

answer

genetic make up, including both dominant and recessive alleles.

question

Allies

answer

a gene which consists of hereditary factors

question

The Nervous system

answer

Controls the functions of the body and receives stimuli from the environment

question

Spinal Cord

answer

major connecting system between the brain and network of nerves. Carries impulse between all organs and the brains is also the control center for many simple reflexs.

question

Epiglottis

answer

Closes when swallowing to prevent food from going down the airway into the Trachea

question

Ecology

answer

Study of the interrelationship between organisms and their psychical surrounding. Ecologist employ a similar set of terminology

question

Biosphere

answer

Zone of planet earth where life naturally occure including land, water, and air extending from the deep crust to the lower atmosphere.

question

Biome

answer

Major life zone of interrelted species bound together by similar climate, vegetation and animal life

question

Medulla (Brain stem)

answer

connection between the brain and the spinal cord. Controls involuntary actions (Breathing, swallowing, beating of heart).

question

Cerebrum

answer

the major part of the brain. Thought to be the center of intelligence, responsible for hearing, seeing thinking, etc

question

Ecosystem

answer

a system made up of a community of animals, plants, and other organisms as well as non-living aspects of its enviornment

question

Community

answer

the collection of all ecologically connected species in an area

question

population

answer

a group of organisms of the same species living in the same region

question

Producers (autotrophs)

answer

make their own food vi photosynthesis

question

Decomposers (bacteria/fungi) aka saprotrophs

answer

break down organic matter release minerals back into the soil

question

Scavengers (vertebrates, vultures, jaklas)

answer

consuming refuse/decaying organic matter ex: carrion/decaying fish

question

Consumer AKA heterotrophas

answer

animals that consumer other organisms to survive

question

Primary Consumer (herbivores)

answer

eat plants

question

Secondary Consumers (carnivores/ omnivores)

answer

eat primary consumers ex: wplves, lions, sharks

question

Tetiary Consumers (top carnivores)

answer

capable of eating secondary conumers

question

Geology

answer

is the science that deals with the history and composition of the earth and its life, especially as recorded in rocks

question

Central nervous system

answer

contains all the other neurons found throughout the brain / spinal cord

question

Cerbellum

answer

a big cluster of nerves tissue that forms the basis for the brain. Concerned with muscular coordination and the coordination of impulses sent out from the cerebrum

question

Gene

answer

unit of inheritance

question

Pathway of the Heart

answer

1. Superior Vena Cava 2. Pulmonary Artery 3. Right Atrium 4. Right Ventricle 5. Pulmonary arteries 6. Pulmonary Veins 7. Left Atrium 8. Left Ventricle 9. Aorta

question

The autonomic nervous system

answer

regulates involuntary action in the heart, stomach and intestines

question

heart

answer

4. Chambered pump with two collection chambers called atria and two pumping chambers called ventricles

question

Circulatory system

answer

transport nutrients throughout the body and get rids of waste

question

Right atrium

answer

recevies deoxygenated blood from the vena cava

question

Broncnioles/Alvelus

answer

1.When the bronchi further subdivide into smaller tubes 2. Each Bronchiole ends in a small sac. The oxygen from the it enters into blood stream of a capillaries.

question

Diaphragm

answer

system of muscles that allow the lungs to expand/contract drawing ir in and out

question

Trachea

answer

further cleans air. Tranchea branches into left/right bronchi are two tubes that lead to the lungs

question

Right Ventricle

answer

pumps blood through the lungs through the pulmonary artery

question

Pulmonary Vien

answer

where oxygented blood returns and than travles to the left atrium than to the left ventricle, aroato, arties, body

question

Valves

answer

help the blood from flowing backwards into the heart

question

Arteriotes

answer

Smaller arteries, which supply blood to the tissue via the capillaries

question

Arteries

answer

carry blood from the heart ti the tissues of the body. Thick wallled, conduction oxygenated lood at high blood pressure

question

Viens

answer

Carry blood back to the heart from the capillaries. Thin-walled, conduct vlood at low pressure, contain many valves to prevent back flow. No pulse. Dark red deoxygentated blood

question

Capillaries

answer

thin wall vessels, very small in diameter. Permit exchange of materials between the blood and the bodys cell (diffusion)

question

Red blood cell

answer

oxygen carrying cell

question

White blood cells

answer

fight infection by destroying foreign organisms

question

platelets

answer

cell fragments that allow blood to clot. All blood cells created in bone marrow, located in the center of bone.

question

The digestive system

answer

responsible for breaking down foods into material the body ca use for energy and body building

question

Digestive tract

answer

essentically a ong nd winding tube that begins at the mouth and ends at the anus

question

Digestion Process

answer

1. Mouth (teeth. tonuge = mechanical digestion, Saliva = being to break down startch) 2. Esophagus: pushed food into the stomach 3. Stomach : food is mixed with gastic acids and pesping, helps breakdown Protein 4. Small intestine 5. Large intestine 6. Kidney 7. Rectrum 8. Anus 9. Urthera

question

Small intestine

answer

bulk of digestion takes place. Fid us broken down by enzymes (produced in the walls of the small intestine, pacreas, and liver)

question

Lipase

answer

changes fat to glycerol and fatty acis

question

Pancreatic amylase

answer

breaks down complex carbohydrtes into simple sugars

question

Trypsin

answer

converts polypeptides into amino acids

question

Large intestine

answer

waste/minerals in the waste matter are absorbed back into the body

question

Kidney

answer

chemichal waste such as excess salts, minerals, waters, are filtered from the blood by the kidney and secreted into the urine

question

Water

answer

for survival

question

Carbohydrates

answer

metabolism

question

fats

answer

provide energy for metabloism

question

vitamins

answer

psysocilogical process ex: bone hardness, healthy gums

question

Fiber

answer

provides bulk, allows large intestine to carry away waste matter

question

Protein

answer

body maintence, growth, repair

question

Arthrophads have..

answer

exoskeltons (external skeleton) ex: insects, spiders

question

Verterbrate have

answer

endroskeletons (internal skeletons) ex: man

question

Bones function

answer

main support of the body, protect vital organs, produce blod cells, store minerals ex: calcium

question

ligaments are..

answer

the connecting bones to bones joints ex: elbow, knee, finger

question

Respiratory system

answer

the process by which blodd cells absorbs oxygen and eliminates carbon dixoide and water vapor

question

Nasal Cavity

answer

filters, moistens and warms the air

question

epiglotties

answer

closes when swallowing to prevent food from going down the airway into the Trachea

question

Spinal Cord

answer

major connecting center between the brain and network of nerves. Carries impulse between all organs and the brain and is also the control center for many simple reflexes.

question

Nervous System

answer

controls the functions of the body and receives stimuli from the environment

question

Alles

answer

...

question

One thousand meters is a...

answer

kilometer

question

One one-hundreth of a meter is called a..

answer

centimeter

question

Fahrenheit =

answer

9/5Celsius + 32

question

Celsius =

answer

5/9(f-32)

question

Element

answer

a substance that cannot be separated into different substances by ordinary chemical methods.

question

Atom

answer

The smallest component of an elment that still retains the properties of the element

question

Proton

answer

A subatomic particle found in the atmos nucleus tht carrues a positive electice charge

question

Neutron

answer

A subatomic particle found in the atoms nucleus that carries a positive electric charge

question

Electron

answer

A subatomic particle that orbits the nucleus of an atom. An electron carries a negative charge and has a miniscule mass. An atom has thw same number of negative electrons around the nucleus as the number of positive protons in the nucleus

question

Molecule

answer

The smallest particle of an element of compound that can exist in the free state and still retain the characteristiccs of the element or compound. The molecules of elemens consist of one atom or tow or more similar atoms; the molecules of compounds consist of two or more different atoms.

question

Conduction

answer

Is the simplest method of heat transfer. It is accomplished by direct contract. Metals are generally goo conductors of heat. Wood styrofoam and plastic are poor conductors of heat which make them good insulators

question

Convection

answer

is the transfer of heat unevenly in a liquid or gas, lowering the densisty of the heated liquid or gas, which causes it to rise and the cooler liquid or gas to fall. The resuliting circulatory movement is termed convection.

question

Radiation

answer

occurs when electromagnetic waves transmit heat. The heat we get from the sun is called radiation

question

atomic number is..

answer

the number of protons in the nucleus and the number of electrons orbiting its shell

question

Protons have a ___ charge

answer

positive

question

Neutrons have a ___ charge

answer

neutral

question

Electrons have a ____ charge and

answer

negative; are in motions around the nucleus

question

Shells

answer

the various orbits that the electons occupy around the nucleys

question

Conductor

answer

is an element that freely conducts electricity

question

Insulator

answer

Does not conduct electricty at all

question

Semiconductor

answer

is neither a good conductor nor insulator , but hs s ome remarkable properites that make it very useful for making electronic compnents

question

Electron Flow Theory

answer

electrons flow away from areas of excess negative charge, to those with deficiency of negtive charge

question

Voltage

answer

Electrical pressure

question

Current

answer

The rate of flow of electrons through a conductor, it is measure in ampes which is one coulomb. One coulomb id the amount of a chare in 6.25 X 10 ^18 `

question

Direct Current

answer

means that current only flows one way in a conductor

question

Altering Current

answer

when the current flowing in a conductor changes direction many times in a second

question

Resistance

answer

Opposition to the flow of current.

question

F =

answer

9/5C+32 9/5 = 1.8

question

C =

answer

5/9 F + 32 = 5/9 = .5555

question

Volume

answer

the measurement of three-dimensional space

question

Mass

answer

as the ammount of matter that something has

question

Weight

answer

as the force exerted on an objects mass by gravity

question

Velocity

answer

the rate at which an object changes position displacemnt of any object / time

question

Force

answer

is the push or pull that forces an object to change its speed or direction, Unit of force is called a newton

question

Work

answer

as the force exerted on an object times the distance moved in the direction of the force. Work = Force X Distance

question

Momentum

answer

the tendency of an object to continue moving the same direction momentum = mass X velocity

question

Acceleration

answer

rate of change of veloicty acceleration = change in velocity / change in time

question

Energy

answer

Capapcity to do work

question

Potential energy

answer

energy storied in an object as a result of its position shape or state

question

Kinetic energy

answer

the energy possessed by a moving object

question

Engine

answer

generates power to drive the vechicles wheels and varrious accessories

question

Cooling system

answer

removes excess heat from the engine

question

Lubrication system

answer

circulates motor oil though the engine to reduce friction and make the engine run smoothly

question

Fuel system

answer

ensure that correct amounts of air and fuel are aviable for efficient combustiin in the engine

question

Ignition system

answer

generates and time the spark that initiates combustion

question

Exhaust system

answer

forms a "pipeline" for watse gases to be removed from the engine and then to be dissipated to the open atmosphere

question

Emission Contorl System

answer

helps limit toxic vechicle emissions

question

Electrical system

answer

includes starting, charging, light and acessosry systems

question

Computer system

answer

Contorls all aspects of vechicle operations, including engine, dirve train, brakes, and suspensions

question

Drive Train

answer

transmits power from the engie to the vecicles drive wheels

question

Suspension and stering

answer

Controls the vehicles ride quality and handling

question

Brake system

answer

stops the vehicle safely and predictably

question

The Engine most used in automobiles are known as..

answer

internal combustion engines

question

Internal Combustion Engine

answer

Fuel is burned internally and the resulting heat is used directly to power an engine. They can be fueled with gasoline, diesel fuel, other petroleum as propane or natural gas. It needsa air fuel and heat source that can be used to ignite the air-fuel mixture

question

Engine Block (Component of the internal combustion engine)

answer

forms the frameowrk for the engine cylinders and reciprocating assembly

question

Piston ((Component of the internal combustion engine)

answer

a cylindrically shaped object with a solid crown (top) that moves up and down in the engine cylinders. Hot gases from the combustion of the air-fuel mixture pust

question

Cylinder (Component of the internal combustion engine)

answer

forms a guide for the piston to move in ; allows the piston to move up and down as the engine completes its cycle

question

Piston rings (Component of the internal combustion engine)

answer

seal the piston to the cylinder and prevent combustion gases from leaking past. Oil rings prevent oil from the engine crankcase from making its way into the combustion chamber

question

Wrist Pin(Component of the internal combustion engine)

answer

connects the piston to the connecting rode and forms a pivot point for the small end of the connecting rod to move on

question

Connecting Rod(Component of the internal combustion engine)

answer

Conects the piston/wrist pin assebmbly to the engines crankshaft. The large end of the eonnecting rod attaches to the crankshaft on the connecting rod journal

question

Crankshaft(Component of the internal combustion engine)

answer

Convets the linear (straight line) motion of the piston into rotray motion, which can then be used to power vechicle or drive an accesory

question

Cylinder Head (Component of the internal combustion engine)

answer

Located above the piston, it housed the combustion chambers, the intake and exhause valves and the intake and exhaust ports

question

Combustion Chamber (Component of the internal combustion engine)

answer

located in the cylinder head directly about the piston, it is where the actual combustion of the air-fuel mixture takes place

question

Intake Valve(Component of the internal combustion engine)

answer

allows air-fuel mixture to be drawn into the combustion chambers. When closed it mus seal the combustion chambers from the intake port

question

Exhaust valves(Component of the internal combustion engine)

answer

allows waste gases to be removed from the combustion chambers. When closed it must seal the combustion chamber from the exhuast port

question

Camshaft

answer

Responsile for the opening and closeing of the engines intake and exhaust valves. The camshaft turns at one-half speec of the engines crankshaft

question

Troposphere

answer

lowest level of the atmosphere, where all weather takes pace. It is the regon of rising and falling pckets of air.

question

Stratosphere

answer

airflow is mostly horizontal. The thin ozone layer in the upper stratosphere has a high concentration of ozone, a particularly reactive form of oxygen. This layer is primarily responsbile for absorbing the ultraviolet radiation from the sun. Temperature is about - 60 C

question

Mesosphere

answer

above the stratosphere is the mesophere, which extends to about 90 kilo abut the Earth. The temperature starts to drop again, to as low as - 90 C. This is where we see "falling stars" meteors that fall to the Earth and burn up the atmosphere

question

Thermosphere

answer

temperature continues to increase with the altitude, with recorded temperatures reaching as high as 2,000 C as its upper limits which extends to several thousan kilmeters above the Earth

question

Warm Front

answer

When a warm air mass overtakes a cold air mass As the warm air advances it rides ove the cold air ahead of it, which is heavier. As the warm air rises the water vapor in it condences into clouds that can produce rain snow leet or freezing rain - often all four

question

Cold Front

answer

When a cold air mass overtakes a warm ar mass. Most cold fronts are precceded by a line of precpiptation as they roar across an area. Can produce very little or no precipitation as they move.

question

Stationary Front

answer

Sometimes two air masses meet and neither is displaced. Instead the two fronts push against each other in a stalement. Stationary fronts often cause cloudy, wet weather that can last a week or more

question

Stratus Clouds

answer

low-hanging, broad, flat clouse that blanket the sky. The lowest of low clouds. Can cause fog. Dark stratus clouds indicate that rain will soon occure

question

Cumulus Clouds

answer

are massive clouds that are puffy like popcorns with relatively flat bottoms and rounded tops. When dark you can expect heavy rain

question

Cirrus

answer

This wispy clouds that occure much higher in the atomsphere at elevations of 20,000 fett or more

question

Internal combustion engines convert..

answer

chemical energy i the air-fuel mixture into heat energy and thi heat energy is then converted into mechcnical energy

question

A four-stroke cycle engine...

answer

requires two complete revolution of the crankshaft to complete one cycle of events

question

It takes ____ strokes of the piston to complete one cycle of events

answer

four

question

Four Stroke cycle beings with the

answer

intake Stroke

question

Cylinder Arrangement

answer

Automotive engines can be bulit in a number of different configurations

question

Most common number of cylinders in automobile enegines are

answer

four, six, and eight

question

Inline design

answer

the simplest cylinder arrangement, all of the engines cylinders are lied up in a row. Inline fource cylinder engines are very popular in front - wheel dive cars with transverse (sideways) mounted engines. Most often found in small - to medium - sized vehicles

question

Horizontally opposed or flat desing

answer

has all of the cylinders lying on the horizontal plane, with half of the cylinders facing away from the other hald and the crankshaft located between them.

question

Camshaft location

answer

The camshaft is responsible for the pening and closing of the engines valves, and it is driven by the crankshaft through a timing chain or timing belt. `

question

Firing Order

answer

The order that the cylinders fire

question

A common firing order for four-cylinder engines is

answer

1-3-4-2

question

Firing order of a V-8 engines is

answer

1-8-4-3-6-5-7-2

question

Disel engines are simple because

answer

they do not incorporate a sparl-ignition system also that a disel engine and most gasoline engines is that diesels inject their fuel directly into the combustion chamber

question

Stoichimometric

answer

The ideal ratio of air to fuel, it is the responsibility of the engines fuel system to maintain that balance

question

Air-Fuel Ratio

answer

a comparison of the weight of the air relative to the weight of the fuel that has been mixed with it. Is ideal air-Fuel ratio is 14.7: 1

question

Atomized

answer

When fuel is mixed with air by the fuel system, The fuel is directed into the air stream that is entering the engine

question

Lean Mixtures

answer

When too much ait and not enough fuel would be described. Burn relatively slowly because there is greater space between the fuel molecules and it takes more tim for a flame to jump from particle to particles. Burn much hotter and thus can cause serious engine damage. Ration 17: 2

question

Radiator

answer

responsible for transferring heat from the collant to the outside air

question

Radiator cap

answer

Responsible for maintaining pressure in the system and allowing coolant to transfer between the collant reservoir and the radiator.

question

Coolant recovery bottle

answer

forms a reservoir for coolant to flow in and out of the cooling system as the engine increase and decreases in tempeature

question

Air-cooling

answer

Where air is circulated over cooling fins on the outside of the engine to remove excess heat

question

Water-Cooling

answer

used a liquid cooland to pick up excess heat and then rejects that heat through a radiator

question

Water-pump

answer

responsible for moving coolant through the cooling system in order to transfer and control heat

question

Water Jacket

answer

Hollow sections in the engine bloack and cylinder head that allow coolant to be transferred through them.

question

Thermostat

answer

Controls enging temperature by allowing coolant to flow into the radiator when the coolant temperature rises above a certain level

question

Bypass tube

answer

Allows coolant to flow back into the water pump from the cylinder head when the thermostat is closed

question

Radiator hoses

answer

Flexible hoses that allow hot coolant to flow between the engine and the vehicles radiator

question

Ignition timing

answer

is the time in the combustion cycle that a spark is generated at the spark plug

question

Lubrication system

answer

Most critical system in terms of engine operation. Without this the internal parts of the engine would develop enough friction to stop the engine completely

question

Fuel system

answer

responsbile for mainting the correct air-fuel mixtrue for efficient engine operation.

question

Ignition System

answer

Most critical vehicle system, without it combustion cannot take place so the engine will not run. The ignition system must generate high-voltage sparks at the correct time in order to make the engine run smoothly and efficiently

question

Radal tire

answer

Is known for its stable footprint and low rolling resistance

question

Brake system

answer

of all the systems on a car, the most important may well be the nrake sustem, it is one thing to not be able to go, it is another thing again to not be able to stop

question

Antilock Brakes

answer

prevent wheel lock under hard braking condition, this gives more control to the driver in slippery conditions and allows the vehicle to stopmore predictably

question

Open-end Wrench

answer

made for speed, easy to slide the wrench on an off a fastener such as a cap screw,

question

Box-end Wrench

answer

loosen tight fasteners, it is a good idea to use a box-end wrench. The box wraps completely around the head of a bolt and therefore meakes greater surface contact

question

Combination Wrench

answer

Has an open-end and box-rnf bulit into opposite end of a wrench. Boh ends are made to fit the same zie fastener, but the technician can loosen the bolt with the box end and then finish removing the bolt more quickly using the open end `

question

Sockets

answer

An alternative to using wrenches to loosen fasteners. Come in 6 and 12 point designs.

question

6 point Sockets

answer

a stronger design and is usually the mechanics first choice in the smaller socket drives sizes.

question

12 point sockets

answer

definitely the most popular in large drive size such as 3/4 inches and above

question

Ratchet

answer

the most commone drive took for sockets, turns the fastener in only one direction as the handles is moved back and forth through a narrow arc. They are reversible so they can be set to tighten or lossen a fastener

question

Air impact wrench

answer

can remove fasteners quickly by applying tremendouse amounts of torque using a hammering actions that vibrates fasteners loose. only impact sockets should be used with an air impact wrench

question

Screwdriver

answer

used so fasteners can often be removed and installed

question

Flat tiip

answer

oldest screwdrivers

question

Ball-peen hammer

answer

Most often used by metal workers and mechanics. Designed with a regular striking face lise most hammers, but also has a rounded end that can be used for sharping metal and making gaskets

question

Rubber mallet

answer

mechanics use this to prevent damage to the parts they are striking. Not made for maxium impact, they are designed to instal delicate parts such as hub caps and prevent damage to their surface

question

Wooden Mallet

answer

Used by a carpenter to achieve the same effect as a rubber mallet.

question

Sledge Hammer

answer

requires the use of a sledge hammer. This long handle hammer with a large steel head that typically requires both hands to operate

question

Chisel

answer

normally has a long edge and is used for cutting, where as a punch is narrow and us used for driving small fasteners and marking layout marks

question

Drift

answer

is used for striking an object where it is important that the hammer itself not come in direct contact with the work

question

Cold Chisel

answer

The most common chisel, has a straight, sharp edge for cutting off bolt heads or separating two pieces of an assembly. Cold Chisels get dull from time to time and must be resharpened on a bench grinder.

question

Pin Punches

answer

are straight cylindrical shape, and are used for driving roll pins. Made to drive pins out of holes and to follow the pin through the hole as it forces it out

question

Center Punches

answer

are used to make small indentations that serve as starting marks for drilling operations. Making a small indentation with a center punch can help the drill bit stay on target long enough to get a hole started.

question

Drifts

answer

often made from soft metals such as mild steel brass and even aluminum

question

Crosscut saw

answer

cut across the grain of wood.

question

Rip saw

answer

made to cut with the grain of the wood and whose teeth are shaped like chisels.

question

Coping saw

answer

Used to make fine. curving cuts. Uses a thin flexible blade that is held tight on a wide frame. The blade can be rotated in the frame for further flexibility making it easier to make difficult cuts on larger pieces of material.

question

back saw

answer

is also made from thin material but has a rigid strip of steel on its top edge for reinforcement.

question

Hacksaw

answer

used for cutting metals such as steel aluminum or copper. the blades are replaceable and it is important to choose the right blade for the material that is going to be cut.

question

Drilling

answer

done to make small holes in wood or metal

question

Boring

answer

When large holes are made in the wood

question

Drill Bits

answer

used for drilling holes

question

Right-Hand Drill Bits

answer

cut by rotating clockwise direction

question

Left-Hand Drill Bit

answer

made to cut in the opposite direction

question

Hole Saws

answer

used for boring large holes. not adjustable so each one is only capable of drilling one size f a hole

question

Variable Speed Drills

answer

desgined to operate over a range of speeds that can be determined by the position of the trigger

question

Lineman Pliers

answer

used for cutting and bending heavy gauge wire

question

Diagonal Cutter

answer

Pliers that made exclusively for cutting

question

Needle Nose pliers

answer

used for holding small objects in tight places.

question

Locking Pliers

answer

will lock tightly in place for holding or clamping objects together

question

Soldering

answer

a process that joins metals by bonding a metal alloy to their srufaces Low temperatures

question

Fasteners

answer

Most man-made assemblies are held together by this

question

Nuts

answer

Thread onto bolt or machine screws to clamp assemblies together. They Will have either a square head or hexagonal head, and can be locked into position using several methods.

question

Wing Nuts

answer

are used when it is necessary to disassemble a components by hand. The two "wings" are attached to the nut make it easy to tighten and loosen without the air of hand tools.

question

Welding

answer

used when joining metals. High temperatures

question

Castellated nut

answer

uses a cotter pin to lock it into place, which must pass through a hole in the bolt or stud that the unt its threaded on.

question

Lock nuts

answer

nylon insert incorporated into its threads that provides enough interference to prevent the nut from loosening

question

Consecutive numbers

answer

numbers that follow one after another in order, without any skipping

question

Factor

answer

A positive interget that divides evenly into a given number with no remainder

question

add fractions

answer

common denominator add up the numeratoes

question

Multiply fractions

answer

Multiply the numerators and multiply the denominators

question

DivideFractions

answer

invert the second fractions and multiply.

question

Compare Fractions

answer

Multiply the numerator of the first fraction by the denominator of the second fraction to get a second product

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