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AS AND A LEVEL MARINE SCIENCE
AS AND A LEVEL MARINE SCIENCE NOTES AND FLASHCARDS
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02/17/2021

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Term
Atom
Definition
smallest particle an element can be divided into and still be the same substance
Term
Compound
Definition
Substance containing two or more elements chemically bonded together.
Term
Molecule
Definition
Group of atoms covalently bonded together
Term
Element
Definition

A substance that cannot be chemically broken down into a simpler substance.

Term
Atomic movement
Definition

- kinetic particle theory: the theory of how particles such as atoms and molecules move in relation and the amount of energy within the system.

- the KPT describes all matter as a collection of particles that are in constant,random motion. this is what gives solids,liquids, and gasses.

Term
Atoms are made up of _ , _ , and _.
Definition
protons, neutrons, and electrons
Term
water vapour
Definition
gaseous phase/state of water; produced when liquid water evaporates or boils.
Term
proton
Definition
positively charged subatomic particle contained within the nucleus of an atom.
Term
neutron
Definition
a neutral subatomic particle contained within the nucleus of an atom.
Term
electron
Definition
a negatively charged subatomic particle that orbits the nucleus of a atom.
Term
protons, neutrons, and electrons are arranged within atoms to provide _ and _
Definition
stability and structure
Term
at the center of the atom is the _
Definition
nucleus
Term
nucleus
Definition

- positively charged central core of an atom made of protons and neutrons.

 

Term
electrons within structure of a nucleus
Definition

- electrons move around nucleus in orbits called shells.

- shells vary in size and distance depending on ow many electrons are present.

- the first shell nearest to the nucleus holds 2 electrons.its the only shell present in both hydrogen and helium.

- the next 2 shells hold up to 8 electrons.

- atoms are the most stable when outer shell of electrons is full.

Term
bonding properties of atoms
Definition

-when individual atoms come together from different substances, they form bonds.

 

Term
H20
Definition

-a water molecule is 2 hydrogen atoms bonded together with 1 oxygen atom.

-water molecules always have a ratio of 2(H)1(O)

Term
properties of compounds
Definition

- can be very different from those of the elements they are made of.

example: hydrogen and oxygen are both gasses at room temperature & require verry low temps. and high pressures to become liquid.

-when combined in a 2(H)1(O) ratio,water can be formed.

Term
new characteristics a new compound develops through bonding are called___
Definition
emergent properties.
Term
the type of bond formed between the atoms of a compound will___
Definition
play a part in the emergent properties of the compound.
Term
the 3 major categories of bonds are:
Definition

 - covalent bonds

- ionic bonds

- hydrogen bonds

Term
kinetic particle theory
Definition
the theory of how particles such as atoms and molecules move in relation to each other and the amount of energy within the sysytem.
Term
shells
Definition
each of a set of orbitals around the nucleus of an atom that can be occupied by electrons.
Term
atomic number
Definition
the number of protons contained in the nucleus of an atom.
Term
bond
Definition
a strong force of attraction holding atoms together in a substance.
Term
emergent properties
Definition
characteristics that are present within a compound or molecule of two or more different elements that those elements do not possess on their own.
Term
covalent bond
Definition
chemical bond that involves the sharing of electrons between pairs of atoms.
Term
ionic bond
Definition
chemical bond that involves the attraction between two oppositely charged ions
Term
hydrogen bond
Definition
a weak bond between two molecules due to the electrostatic attraction between a hydrogen atom in one molecule and an atom of oxygen,nitrogen or fluorine in the other molecule.
Term
ion
Definition
an atom or molecule that has lost or gained one or more electrons creating an electrical charge.
Term
polar
Definition
when opposite sides of a molecule have contrasting (partial) electric charge.
Term
solvent
Definition
a substance which is able to dissolve other substances.
Term
density
Definition
a measure of the mass of a defined volume of water.
Term
specific heat capacity
Definition
the heat required to raise the temperature of the unit mass of a given substance by one degree celcius
Term
solute
Definition
a solid that dissolves in a solvent
Term
solution
Definition
a mixture of a solute dissolved in a solvent
Term
solubility
Definition
the ability of a solute to dissolve within a solvent ( such as water )
Term
dissolution
Definition
the process of being dissolved
Term
salinity
Definition
a measure of the quantity of dissolved solids in ocean water, represented by parts per thousand (ppt) or
Term
precipitation
Definition
water that falls from the atmosphere to the earths surface as rain, sleet, snow or hail.
Term
run-off
Definition
the flow of water from land caused by precipitation
Term
evaporation
Definition
a change in state from liquid to gas below the boiling point of a substance
Term
hypersaline
Definition
when a body of water has a salinity level greater than 40 ppt
Term
halocline
Definition
a layer of water below the mixed surface layer where a rapid change in salinity can be measure as depth increases
Term
thermocline
Definition
a layer between two layers of water with different temperatures
Term
pH
Definition
a numeric value expressing the acidity or alkalinity of a solution on a logarithmic scale
Term
acidic
Definition
having a pH below 7
Term
alkaline
Definition
having a pH above 7
Term
neutral
Definition
having a pH that equals 7
Term
pH scale
Definition
a logarithmic scale that measure the ratio of hydrogen ions to hydroxide ions.
Term
turbulence
Definition
irregular changes in the speed and direction of fluid movement
Term
dissolved oxygen (DO)
Definition
concentration of oxygen dissolved in a solution
Term
phytoplankton
Definition
microscopic photosynthetic organisms that live in the upper sunlit layers of water
Term
oxygen minimum layer
Definition
the layer within the ocean where the concentration of dissolved oxygen is at its lowest,typically found below the photic zone between 100m and 1000m deep
Term
water column
Definition
a vertical section of water from the surface to the bottom; useful concept when discussing changes in the abiotic factors within the body of water
Term
gradient
Definition
the rate of change in the y-axis value as the x-axis value increases.
Term
thermal insulator
Definition
a substance which reduces the rate of transfer of thermal energy
Term
pycnocline
Definition
a layer of water between two layers of water with different densities
Term
estuary
Definition
a partially enclosed,tidal,coastal body of water where fresh water from a river meets the saltwater of the ocean
Term
littoral zone
Definition
the benthic,or bottom,zone between the highest and lowest spring tide water marks on a shoreline;also referred to as the intertidal zone.
Term
earthquake
Definition
a sudden release of energy inside the earth that creates seismic waves;usually caused by movement of tectonic plates or volcanic activity
Term
crust
Definition
the outermost layer of rock on earth
Term
mantle
Definition
a region of molten rock within the interior of the earth, between the core and the crust.
Term
core
Definition
the dense, central region within earth.
Term
seismic
Definition
having to do with vibrations of the earths crust; earthquakes
Term
oceanic crust
Definition
the dense,basaltic layer of crust that makes up the bottom of the ocean basins
Term
continental crust
Definition
the thicker, less dense crust that makes up the foundation of the continents
Term
continental drift
Definition
a theory supporting the possibility that continents are able to move over earths surface
Term
plate tectonics
Definition
the process where large sections (plates) of the earths crust are in constant movement over the fluid mantle,causing earthquakes and volcanoes at the borders between plates
Term
lithosphere
Definition
the outermost layer of the earths crust
Term
mid-ocean ridge
Definition
a mountain range with a central valley on an ocean floor at the boundary between two diverging tectonic plates,where new crust forms from upwelling magma
Term
paleomagnetic stripes
Definition
the pattern of magnetic stripes on the ocean floor due to reversals in the earths magnetic field and seafloor spreading
Term
polarity
Definition
having two opposite states of being on either end (such as the north and south pole,or pos and neg end of a magnet)
Term
divergent boundary
Definition
where two tectonic plates are moving away from each other
Term
convection current
Definition
the movement of fluids or air based on density differences caused by differing temperature
Term
convergent boundary
Definition
when two or more tectonic plates come together
Term
subduction
Definition
the process where one lithospheric plate slides below another at a convergent plate boundary
Term
trench
Definition
a long, narrow and deep depression on the ocean floor with relatively steep sides; caused by convergent plate boundaries
Term
volcano
Definition
a mountain or hill with a crater or vent through which lava,rock fragments,hot vapour and gas are being forced from the earths crust
Term
tsunami
Definition
a seismic sea wave created by an underwater earthquake or volcanic event;not noticeable in the open ocean but building to great heights in shallow water
Term
hydrothermal vent
Definition
an area where cold ocean water that has seeped into the earths crust is superheated by underlying magma and forced through vents in the ocean floor
Term
transform boundary
Definition
when two plates are moving in an antiparallel direction,creating friction between them
Term
abyssal plain
Definition
a flat, sandy region of the ocean floor found between trenches and the continental rise
Term
weathering
Definition
the weathering down or breaking of rocks through physical,chemical or organic means
Term
erosion
Definition
a natural process where material is worn away from the earths surface and transported elsewhere
Term
sedimentation
Definition
the deposition of suspended particles from water
Term
deposition
Definition
a geological process where sediments, soil and rocks are added to a landform or land mass
Term
delta
Definition
a low-lying triangular area at the mouth of a river formed by the deposition of sediments
Term
morphology
Definition
the study of the forms of things
Term
turbidity
Definition
the level of transparency loss water has due to the presence of suspended particles in the water;the higher the turbidity, the harder it is to see through the water
Term
tide
Definition
the periodic rise and fall of the surface of the ocean resulting from the gravitational pull of the moon and sun
Term
semi-diurnal
Definition
occurring twice daily
Term
diurnal
Definition
occurring daily
Term
tidal range
Definition
the difference in height between the high-tide mark and the low-tide mark over the course of a day; also called the tidal amplitude.
Term
tidal surge
Definition
the coastal flooding of an abnormally high seawater level associated with low pressure weather systems; also called a storm surge
Term

spring tide

 

Definition
a tide that occurs when the sun and moon are aligned, causing the largest tidal range
Term
neap tide
Definition
a tide that occurs when the moon and sun are at right angles from each other, causing the smallest tidal range.
Term
current
Definition
a continuous physical movement of water caused by wind or density
Term
current
Definition
a continuous physical movement of water caused by wind or density
Term
coriolis effect
Definition
a force that results from the earth's rotation that causes objects or particles in motion to deflect to the right in the northern hemisphere and to the left in the southern hemisphere
Term
thermohaline circulation
Definition
large-scale ocean circulation caused by density differences due to temperature and salinity changes in the world's ocean
Term
global ocean conveyor belt
Definition
constantly moving systems of deep ocean water driven by thermohaline circulation
Term
downwelling
Definition
the downward movement of water in the sea due to density differences
Term
upwelling
Definition
the movement of cold, nutrient-rich water from deep in the ocean to the surface
Term
EL Niño
Definition
a warm current that develops off the coast of Ecuador around December, which can cause widespread death within local food chains
Term
La Niña
Definition
a cold current that develops off the coast of Ecuador and spreads across the pacific, reducing sea-surface temperatures for extended periods of time
Term
Humboldt current
Definition
a cold-water current with low salinity levels that flows north along the western coast of South America; also called the peru current
Term
chlorophyll
Definition
a pigment found in plants and algae that is used to absorb sunlight for photosynthesis
Term
photosynthesis ( photosynthetic, photosynthesise)
Definition
the process of using light energy to synthesise glucose from carbon dioxide and water to produce chemical energy
Term
carbohydrate
Definition
organic compounds occurring in living tissues that contain carbon, hydrogen, and oxygen ( for ex. starch, cellulose, and sugars); carbohydrates can be broken down in the process of respiration to release energy
Term
consumer
Definition
an animal that feeds on other organisms to gain energy from food
Term
algal bloom
Definition
a rapid increase in poulation of algae
Term
community
Definition
all the different populations interacting in one habitat at the same time
Term
mutualism ( mutualistic )
Definition
a relationship between two different organisms where both organisms benefit
Term
predation
Definition
a relationship between two organisms where a predator hunts, kills and eats a prey animal
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