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EXAM REVISION (Chemistry (Provided Resources (Chemistry syllabus),…
EXAM REVISION
Chemistry
Equations
Methods
Valencies
Atoms, Molecules and Mixtures
Metals and Minerals
Periodic table
Provided Resources
Chemistry syllabus
Biology
Taxonomy
Fungi
Have cell walls of
CHITIN
Reproduce with
SPORES
SAPROTROPHS
- get nutrients from dead or decaying organic matter
Are either
MULTICELLULAR
or
SINGLE CELLULAR
external digestion - secretes
ENZYMES
to digest food, and then absorb the smaller molecules.
Most are
SAPROTROPHS
, some are
PARASITES
Mushrooms are their
FRUITING BODIES
Grow a
MYCELIUM
which is a network of
HYPHAE
Single celled Fungi are called
YEAST
and reproduce asexually by
BUDDING
Animalia
Are
MULTICELLUR
No cell wall
HETEROTROPHS
- depend on consuming other organisms
Internal digestion
More extensive movement
Nervous system
Storage carbohydrate -
GLYCOGEN
Protoctista
EUKARYOTES
that don't fit into the other Eukaryotic kingdoms
Unlike other kingdoms, they don't all evolve from one relatively recent, common ancestor
Viruses
We refer to
VIRUS PARTICLES
not virus cells
PARASITES
LIFECYCLE
A virus particle gains entry to an organism, such as via infected semen or blood in the case
of HIV or through droplets containing the ‘flu virus when someone sneezes.
The virus particle binds to the cell surface membrane of a host cell. The proteins that stick out from surface of the virus particle often help the virus to make contact with the correct cell that it will infect. This is why one type of virus will often infect only one or a few specific species, or even specific cell types within that organism.
The virus penetrates the
HOST CELL
and the genetic material is released into the host cell
cytoplasm.
The genetic material is used by the host cell to manufacture new virus proteins – in effect the host cell’s machinery has been hijacked by the virus. More copies of the virus genetic material are made by the host cell.
New virus particles are assembled in the cytoplasm – thousands of them which are often tightly packed within the cell.
The host cell bursts open, releasing the newly-made virus particles which can then go on to infect further cells. Some viruses bud off from the host cell, taking some of the host cell’s surface membrane with them.
Prokaryotes
Have no
TRUE NUCLEUS
Have no membrane-bound organelles
Plants
Are
MULTICELLULAR
AUTOTROPHS
- get nutrients from photosynthesis
Have a cell wall of
CELLULOSE
Store energy in the form of
STARCH
Bacteria
Features
(Some) have a
CAPSULE
which is a layer of protective slime round the cell
(Some) have a
FLAGELLUM
to move in a random direction
Have a
CYSTOPLASM
, containing mostly water where most important chemical reactions take place
Have a cell wall of
PEPTIDOGLYCAN
Have
PLASMIDS
, a small, extra loop of DNA
Have a
CELL MEMBRANE
made of lipids. It is selectively/partially permeable
DNA
in a circular loop
Aseptic Technique
Label everything clearly
Keep Petri dishes closed
Sterilise all equipment and work surfaces
Work near a Bunsen flame to create an updraft preventing airborne bacteria contamination
Wear safety glasses
Wash hands before and after
Keep bacteria at 30°C to prevent spread of human pathogens
Bacterial Growth
A suitable temperature
Water
Nutrients
Mineral Ions
Oxygen (if respire aerobically)
Microscopy
Image size = magnification x object size (I=MO)
1m = 1000 mm
1mm = 1000 um (micrometres)
Plant reproduction
Plant leaf
Layers
Waxy cuticle - keeps water in
Upper epidermis - provides protection
Palisade layer - sight of most photosynthesis
Spongy mesophyll - allows the evaporation and exchange of gases
Lower epidermis spotted with stomata - allow exchange of gases at periodical times of the day
Lower epidermis
Xylem and Phloem
XYLEM
- Transports
WATER
and
MINERAL IONS
. These are on the
INSIDE
PHLOEM
- Transports
DISSOLVED AMINO ACIDS
and
SUGARS
like
SUCROSE
Reproduction
Asexual Reproduction
Pollination
types of pollination
Self Pollination
Cross pollination
Pollen is transferred from one plant to another plant of the same species
Insect Pollinated
STAMENS
within flower so insects must make contact
STIGMA
enclosed within flower so that insect must make contact
STIGMA
must be sticky so pollen grains attach from insects
PETALS
must be large and brightly coloured to attract insects.
NECTARIES
are present as a reward for insects
Larger pollen grains are sticky to stick to insect bodies.
Wind Pollinated
STAMENS
exposed so wind can blow pollen away
No need for petals
The stamens/stigma have
LARGE SURFACE AREA
, in order that the pollen is picked up by the wind easier
Parts of the plant
Male
Anther
Filaments
Petals
Sepals
Female
Pistil
Where many
CARPELS
(female structures) are fused together
Style
The tube that connects the stigma with the ovary
Ovule
Female gametes are held in this area
Ovary
This is where the ovules are kept and protected until it is time to germinate.
Stigma
Where the pollen is caught.
Germination
Seed
Seed contains a plant embryo and a food store
They have a low water content - 5-15% Water so they can stay
dormant
Food store is in the endosperm or cotyledons
Some seeds have only one cotyledon, so they are monocotyledons
Some have two, so they are duocotyledons
The Fruit leaving the flower is called
DISPERSAL
Triggers
Germinating.
KEY DEFINITIONS AND IDEAS
OSMOSIS: THE NET MOVEMENT OF WATER PARTICLES FROM AN AREA OF HIGH WATER POTENTIAL TO AN AREA OF LOW WATER POTENTIAL DOWN A WATER POTENTIAL GRADIENT ACROSS A SEMI-PERMEABLE MEMBRANE.
DIFFUSION
: The net movement of particles from a region of high concentration to a region of low concentration down a concentration gradient.
Physics
Electricity
http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa/electricity/
Static Electricity
Charge Carriers
Movement by friction
Opposites Attract
Like states attract
Current Electricity
Current
#
Only Moves around a complete circuit
Only moves from negative to positive terminals on a battery
But Conventional current runs the other way, from negative to positive
#
Is the same at all points on a circuit which does not have junctions
On circuits with junctions the sum of the 2 split lines adds up to the original current
Is measured in Amps, which are coulombs of charge per second. 1 coulombs is 6.242×10^16 electrons
Circuit Diagrams
Must be drawn with rulers
Must be neat
Must include battery voltage if applicable
All components which must face a certain way must be based on conventional current
Therefore the arrow on a diode must point from negative to positive
Voltage
Goes from positive to negative
This is conventional current again.
It is actually wrong but must be followed for accurate circuit diagrams
So if there was a 5v potential difference 1 terminal of the battery (positive) would be viewed as 5V, and one as 0V, but it is really moving from negative to positive
V=IR
1V means that per coulon of charge that goes around the
Is measured in volts: 1V means that per coulomb of charge 1 joule of energy goes through the circuit
Voltage is always the same per circuit loop
Power = Current*Voltage
Light
Forces
Use Logic
Density, Pressure, Mass...
Pressure
Pressure = F/A
Mass
Mass is not weight
Density
Density = Mass/Size
Springs
MFLs
Spanish
German
Verbs
Future tense
The Future Tense takes the verb
WERDEN
as an auxiliary.
Ich werde
Du wirst
Er wird
Wir werden
Ihr werdet
sie/Sie werden
The Verb goes to the end of the sentence in the infinitve:
Ich werde zur Schule gehen
Perfect Tense
Regular verbs:
The verb to have + Past participle
Past participle takes the infinitive, takes off the 'en' and adds 't' and then adds 'ge' before it:
Machen - macht - gemacht
Ich habe gemacht
Verbs of motion:
'sein' followed by participle
(also includes verbs of change of state)
Verb Vocab
Present
IRREGULAR VERBS
SIMPLE PAST
Sein:
Ich war
Du warst
er war
wir waren
ihr wart
Sie/sie waren
Haben:
Ich hatte
du hattest
er hatte
wir hatten
Ihr hattet
Sie/sie hatten
Müssen:
Ich musste
Du musstest
er musste
wir mussten
ihr musstet
Sie/sie mussten
Können:
Ich konnte
du konntest
er konnte
wir konnten
ihr konntet
Sie/sie konnten
Dürfen:
Ich durfte
du durftest
er durfte
wir durften
ihr durftet
Sie/sie durften
Wollen:
Ich wollte
du wolltest
er wollte
wir wollten
ihr wolltet
Sie/sie wollten
Sollen:
Ich sollte
du solltest
er sollte
wir sollten
Articles
Definite Plural:
die,
die,
den
Definite:
der, die, das
den, die, das
dem, der, dem
Indefinite:
ein, eine, ein
einen, eine, ein
einem, einer, einem
Adjective endings
Definite articles
e, e, e, en
en, e, e, en
en, en, en, en
en, en, en, en
Indefinite articles
er, e, es, en
en, e, es, en
en, en, en, en
en, en, en, en
No article
nom: er, e, es, e
acc: en, e, es, e
dat: em, er, em, en
General Grammar (convenience)
weil clauses: conjugated verb to the end
Time, manner, place
Adverbs placed after the verb
Italian
French
Classics
Latin
Grammar
Declensions
4th
5th
3rd
2nd
1st
Conjugations
Tenses
Vocab
CE3
CE2
Words this year
CE1
Vocab Aids
Memrise
Quizlet
Greek
Grammar
Declensions
1st
3rd
2nd
Conjugatons
Tenses
Imperfect
Aorist (weak)
Aorist (Strong)
Future
Present
Participles
Present
Aorist (Strong)
Aorist (weak)
Ancient History
Geography
Climate Change
Globalisation
UK in the 21st Century
History
Unseen Source Questions
Failure of the league of Nations
No Standing Army
Did not include germany for quite a while
Took ages over the manchurian crisis
Then Japan just left the league
Weimar Germany
Governments
Parties
SDP
The left wing party
Ebert
Government was put in place in order to be blamed for the war.
KDP
The communist party
Centre Party
Right wing catholic party
Stresemann, died 1929
How they worked
Party based proportional representation
Everybody got a vote
Seats were allocated based on voting percentages
This meant that small parties were much more legitimate, and it was incredibly difficult to win a majority in the Reichstag
This meant that the Reichstag could often not do much and the president had to rule by article 48. (An issue)
This also contributed to the fact that anti-democratic parties ended up doing quite well.
Social Factor
Idea of stab in the back
Sadness over losing war
English
Creative Writing
Description
Narrative
Unseen Analysis
Poetry
Prose
Maths
link to account.bbc.com
Exam Technique