biol,chemistry,pysics,agric

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    Isimaila odesola Member

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    Isimaila odesola Member

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    2012 WAEC PHYSICS PRACTICAL
    Question 1 => retort stand
    withclamp;spring balance;
    twobeakers,500cmcube a)
    containing water and
    labelledwater b) containing
    kerosene andlabelled liquid
    L;set of
    masses50g,100g,150g,200g,250g;threadabout
    1m. Question 2 => retort stand
    withclamp;flat bottom plastic
    petri-dish;syringe about
    (0-10cmcube).Remove the
    needle. Pull up theplunger.
    Use flame from a matchstick
    to melt and seal the tip of the
    syringe to ensure that it
    isairtight; use appropriate
    (plasticto plastic) adhesive to
    fix thebottom of the petri-
    dishsymmetrically to the top
    of the plunger; set of
    masses500g,1000g,2000gand
    2500g. Note: Masses may be
    improvisedwith fine dry sand.
    Question 3 => potentiometer
    (0-100cm)ammeter(0-3A)
    volmeter(0-5V)2ohms
    standard resistorlabelledR;
    two dry cells each 1.5v or 2v
    freshly
    chargedaccumulator;plugkey;eightconnecting
    wires. 2012 WAEC BIOLOGY
    PRACTICAL SPECIMENS
    Specimen A => Garden egg
    friut Specimen B => Tridax fruit
    Specimen C => GrainWeevil
    Specimen D => Tick Specimen E
    => Rat {wetPreserved}
    Specimen F => Atlas vertebra
    ofa small mammal Specimen G
    => Axis vertebra ofa small
    mammal Specimen H =>
    Cervical vertebraof a small
    mammal Specimen J => Tilapia
    fish <webpreserved>
    Specimen K => Toad
    <wetPreserved> Specimen L
    => Lizard <wetPreseved>
    NOTE:- Specimen F, G & H are
    Peculiar to Candidate in
    Ghana,Sierra-Leone & the
    Gambia Only..

    Isimaila odesola Member

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    Isimaila odesola Member

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    Agric practical Specimen
    A =
    wood ash(to be
    labelled)
    b = charcoal(to be labelled)
    c = limestone(to be labelled)
    d = garden soil e = dillute
    hydrochloric
    acid(to
    be
    labelled)
    f = 250cm measuring cylinder
    more
    coming
    AGRIC FULL PRACTICAL
    ANSWERS
    A = wood ash | chemical
    compound = Ca4(PO4)2 SiO4 it
    is a lime chemical
    B = charcoal | source = burnt
    wood
    C = limestone | chemical
    compound = CaCO3 | use as
    lime advantages of b and c
    1 : improve the soil structure
    2 : increase microbial activities
    3 : increases organic matter
    breakdown 4 : reduces soil ph
    5 : enhances the movement
    of
    water and air in the soil
    Effects of excess of a , b and c
    1 : decrease the activity of soil
    microbes
    2 : changes soil ph
    3 : differencies of iron ,
    magnessiu$ and copper
    4 : inhibit absorption of boron
    5 br /> decreases the soil
    phosphorus there is more
    specimen
    specimen f = measuring
    cylinder
    pour the garden soil in a
    measuring cylinder and add
    hcl acid to it the soil becomes
    acidic as it turns blue litmus
    red
    in summary any
    substance that
    turns blue litmus paper to red
    is an
    acidic substance but if it turn
    red litmus blue it is an
    alkaline causes of soil acidity
    1 : leaching
    2 : use of acid fertilizer 3 br />
    accumulation of hydrogen
    ion in the soil
    4 : heavy rainfall
    5 : present of sulphur in soil
    6 : purification in a water
    logged soil.

    Isimaila odesola Member

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    2012 WAEC
    BIOLOGY
    PRACTICAL
    SPECIMENS Specimen
    A => Garden egg friut
    Specimen B => Tridax
    fruit
    Specimen C =>
    GrainWeevil
    Specimen D => Tick
    Specimen E => Rat {wet
    Preserved}
    Specimen F => Atlas
    vertebra of a small
    mammal
    Specimen G => Axis
    vertebra of a small
    mammal Specimen
    H => Cervical vertebra
    of a small mammal
    Specimen J => Tilapia
    fish [web preserved]
    Specimen K => Toad
    <wet Preserved>
    Specimen L => Lizard
    <wet Preseved> .

    Isimaila odesola Member

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    start readn nw


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