Post by Admin on Nov 21, 2016 12:04:11 GMT
Biology
Investigate quantitatively, to determine the impact of each additive, the effects on samples of a
garden soil of adding 20% by mass of (a) sand, (b) potting compost, and (c) clay* on
(i) the soil’s ability to retain water,
(ii) the rate of drainage of water through the soil.
Chemistry
Investigate quantitatively, at room temperature, the effect of dilution on the pH of
(i) vinegar,
(ii) a solution containing 5 g washing soda per litre of water,
(iii) a solution containing 5 g sucrose per litre of water.
Physics
Using conductors made of children’s play (modelling) dough, investigate quantitatively the effect on
resistance, calculated from measurements of voltage across and current through the conductors, of
changing the conductor length and obtain data to establish whether dough colour has an effect on
its resistance.
Investigate quantitatively, to determine the impact of each additive, the effects on samples of a
garden soil of adding 20% by mass of (a) sand, (b) potting compost, and (c) clay* on
(i) the soil’s ability to retain water,
(ii) the rate of drainage of water through the soil.
Chemistry
Investigate quantitatively, at room temperature, the effect of dilution on the pH of
(i) vinegar,
(ii) a solution containing 5 g washing soda per litre of water,
(iii) a solution containing 5 g sucrose per litre of water.
Physics
Using conductors made of children’s play (modelling) dough, investigate quantitatively the effect on
resistance, calculated from measurements of voltage across and current through the conductors, of
changing the conductor length and obtain data to establish whether dough colour has an effect on
its resistance.