Science Sparks: GCSE and A Level Revision

AS Revision

A2 Revision

Chemistry

Mass Spectroscopy Fragments to Learn: (all subscripts missing)
COOH - 45
C2H5 - 29
C3H7 - 43
CH3 - 15
CO- 28
C5H7 - 57

Enthalpy Changes

Enthalpy Change of neutralisation 1 mole of water is formed by the reaction of an acid and base under standard states and conditions - exothermic process

Enthalpy change of solution - when one mole of a solute is dissolved in sufficient solvent that no further enthalpy change occurs on more dilution - 1 mole of a solid --> 1 mole of an (aq) compound
(note: it's pretty much an enthalpy change where you're creating a saturated solution)

Standard Lattice Enthalpy - (pretty much a measure of ionic bond strength) When one mole of a solid ionic compound is formed from its gaseous ions under standard conditions and states

Cl2 --> 2Cl atomisation of chlorine
Cl already a gas - convert it to XCl (X being a number)
whatever number acts as X that's how much you times the atomisation of chlorine by

Biology

AQA Unit 5 Biology

Receptors and the Nervous System...

The Nervous System
What is a receptor?
What is a photoreceptor?
What is a synapse?

Homeostasis and maintaining constant environments...

What is homeostasis?

Genetics...

What is sickle cell anaemia?
What is tRNA?
Panda Genetic Fingerprinting

Genetic Engineering - recombinant DNA technology
Genetically engineered organisms - TRANSFORMED

Uses of Genetic Engineering
1. Agriculture
2. Industry
3. Medicine