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summer homework
53
Science
11th Grade
08/05/2011

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Term
Organism
Definition

               

Any individual living thing                                                                                                                                              

                                     

Term
Species
Definition
Group of organisms so similar to eachother that they can breed and produce fertile offspring
Term
Exponential Growth
Definition
Dramatic increase in population over a short period of time
Term
Ecosystem
Definition
Collection of prganisms and nonliving things, such as climate, soil, water, and rocks in an area
Term
Producers/autotrophs
Definition
organism that obtains its energy from abiotic sources, such as sunlight or inorganic chemicals
Term
Consumers/Heterotrophs
Definition
Organism that obtains its energy and nutrients by consuming other ogranisms
Term

Detritivores

 

Definition
Organism that eats dead organic matter
Term
Adaption
Definition
inherited trait that is selected for over time because it allows oragnisms to better survive in their enviorment.
Term
Mutation
Definition
Change in the DNA sequence
Term
Biotic
Definition
Living things, such as plants , animals, fungi, and bacteria
Term
Abiotic
Definition
Nonliving factor in an ecosystem, such as moisture, tempature, wind, sunlight, soil, and minerals
Term
Gene
Definition
Spacific region of DNA that codes for a paticular protein
Term
Trait
Definition
Characteristic that is inherited
Term
Chromosome
Definition
Long continuous thread of DNA that consits of numerouse genes and regulatory information
Term
Gene Pool
Definition
Collection of alleles found in all of the individuals of a population
Term
Natural selection
Definition
mechanism by witch individuals that have inherited beneficial adaptions produce more offspring on average then do other individuals
Term
Biodiversity
Definition
Variety of life within an area
Term
Extinction
Definition
Emimination of a species from earth
Term
CO2
Definition
carbon dioxide
Term
CO
Definition
Carbonic oxide
Term
C6h12O6
Definition
Glucose
Term
Population
Definition
All of the individuals of a species that live in the same area
Term
Community
Definition
Collection of all the different populations that live in one area
Term
organic vs inorganic
Definition
• Inorganic compounds can form salts. Organic compounds can't. (not always true) • Organic compounds contain carbon. Inorganic compounds don't. “” • Inorganic compounds contain metal atoms. Organic compounds don't
Term
1st Law of Thermodynamics
Definition
Energy and matter are interchangable but cannot be created or destroyed. The total amount of energy in the whole universe remains constant, only changing from one form to another

Energy and matter are interchangable but cannot be created or destroyed. The total amount of energy in the whole universe remains constant, only changing from one form to another

Energy and matter are interchangable but cannot be created or destroyed. The total amount of energy in the whole universe remains constant, only changing from one form to another
Term
2nd Law of Thermodynamics
Definition
This law states that any system always tends to move toward its probable state of energy. For example, a spring watch will run until the potential energy in the spring is used up. If no new energy is input into it (in the form of winding the spring up) then it has returned to its most probable state, which is really not to run. The most misunderstood law.
Term
Decomposers
Definition
Detritivore that breaks down organic matter into simpler compounds, returning nutrients into an ecosystem
Term

Radioactive Decay

Alpha

Definition

The reason alpha decay occurs is because the nucleus has too many protons which cause excessive repulsion. there exists a nonzero probability of transmission. That is, an alpha particle (Helium nucleus) will tunnel out of the nucleus

Term

Radioactive Decay

Beta

Definition
occurs when the neutron to proton ratio is too great in the nucleus and causes instability. In basic beta decay, a neutron is turned into a proton and an electron. The electron is then emitted.
Term

Radioactive Decay

Gama

Definition
occurs because the nucleus is at too high an energy. The nucleus falls down to a lower energy state and, in the process, emits a high energy photon known as a gamma particle
Term
Half Life
Definition
 the period of time it takes for a substance undergoing decay to decrease by half
Term
Law of conservation of matter
Definition
matter cannot be created or destroyed in an isolated system
Term
Law of conservation of energy
Definition
that the total energy of an isolated system is constant despite internal changes
Term
Thermal Energy
Definition

The ultimate source of thermal energy available to mankind is the sun

heat is thermal energy in transfer

Thermal energy comes from the movement of atoms and molecules in matter. it is a from of kinetic energy produced from the random movements of thoes molecules. thermal energy of a system can be increased and decreased

Term
Kinetic Energy
Definition

Energy prossessed by an object due to itss motion or movement

Kinetic energy of an object is relative to other moveing and stationary objects in its immediate enviorment

it can be transferred from one moving object to another(example:collisions)

Term
Potiential Energy
Definition

The stored energy in an object or system because of its position or configuration

It is not relative to the enviorment of an object

it cannot be transferred

Term
Entrophy
Definition
Measure if unavailable energy: a measure if the energy in a system or process that is inavailable to do work.
Term
Convection Current
Definition
The transfer of heat the resilts from the movement of air from one location to another, usually as a result of a stream of air produced by thermal convection caused by differences in temperature
Term
Photosynthesis(reactants and products)
Definition

Using sunlight as a source of energy

In a chemical reaction, reactants are chemical compounds that are consumed of trasformed to make the products

REACTANTS: carbon dioxide and water

PRODUCTS: glucose anf oxeygen

Term
Cellular Respiration(Reactants and products)
Definition

Photosynthesis and cellular respiration are complementary reactions.

Cellular respiration is the process by witch most cells make energy

REACTANTS:Oxegyn and glucose

PRODUCTS: carbon dioxide and water

Term
Aerobic
Definition
(of an organisms or tissue) Requiring the presence of air or free oxegyn for life.
Term
Anaerobic
Definition
(of an organism or tissue) Living in the absence of air or free oxeygen.
Term
Plate Tectonics
Definition
A Theory of global tectonics in witch the lithosphere is divided into a number of crustal plates, each of witch moves on the plastic asthenophere more or less independemtly to collide with, slide under, or move past adjacent plates
Term
Weathering Chemical
Definition

Is the breaking down of rocks, soil and minerals, biota and waters. It happends with no movement

Chemical involves the direct effect of atmospheric chemicals or biologically produced chemicals in the break down

Term
Weathering Mechanical
Definition

Is the break down of Rocks,soil and minerals,biota and waters

It happens with no movement

Mechanical involves the breakdown or rocks and soil through direct contact with atmospheric conditions, such as heat, water , ice and pressure

Term
Minerals
Definition
A mineral is made up of one substance that under normal circumstances would form crystals. minerals are the building blocks of rock. the crystals may be too tiny to see, and if a mineral cooled to quickly glass might form instead of crystals "massive" forms of minerals are really just a bunch of tiny crystals all stuck together
Term
Rocks
Definition
Rocks are made up of minerals. Most rocks have several types of minerals in them, but some have only one type of mineral. for example sandstone is mostly quartz
Term
Climate vs weather
Definition
The difference between weather and climate is measure of time. weather is what conditions of the atmosphere are over a short period of time, and climate is how the atmosphere behaves over relatively long periods of time
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