crystallisation

Question 1

Crystals are formed by

Answer 1

Precipitation from aqueous solution or cooling magma / lava

Question 2

Particualr mineral will form when…

Answer 2

Chemical composition and physical conditions (temp, pressure) are right

Question 3

Solvent ( water ) …..

Answer 3

Disolves solute (material). This is an equous soloution

Question 4

What is supersaturation

Answer 4

More solute than normal is dossolved. Somute precipitates (crystallises)

Question 5

SOLUTION EVAPORATES

Answer 5

Solvent volume DECREASES, solute concentration INCREASES until super saturated

Question 6

SOLUTION COOLS DOWN

Answer 6

As temperature drops solution cannot hold as much solute

Question 7

SOLUTION BOILS

Answer 7

DECREASE in PRESSURE solution concentrates rapidly until supersaturated

Question 8

Crystallisation from MAGMA

Answer 8

Igneous rock is solidified magma (molten rock). Rock crystals depends on chemcial composition

Question 9

Magma cools quickly …. Magma cools slowly …..

Answer 9

Crystals are small

Crystals are large