Water

Question 1

Property’s of water

Answer 1

Ice is less dense than water 
High surface tension 
Strong cohesive properties and high tensile strength 
Colourless with high transmission 
Liquid at room temp
High specific heat capacity

Question 2

Surface tension

Answer 2

Water has a high surface tension meaning it can form a habitat on the surface of water.
The molecules of the liquid are effected by various intermolecular forces of attraction, those molecules in the surface are not affected by molecules above them, and o pull together more strongly.

Question 3

Strong cohesive properties and high tensile strength

Answer 3

Water can be pulled through plants in a column as the water molecules are held together by H bonds.
Water molecules show a strong attraction to one another

Question 4

Colourless with a high transmission

Answer 4

Light can pass through cells for photosynthesis

Question 5

Liquid at room temp

Answer 5

Can be used for transport and a medium for reactions

Similar molecules are gasses at room temp . Water has h bonds between the water molecules.

Question 6

High Latent heat of vaporisation

Answer 6

Can be used for cooling organisms by evaporation . Eg sweat

While changing state a substance will take in heat energy or expel heat energy without a change in temperature.

Question 7

High specific heat capacity

Answer 7

Conditions are stable in cross and aquatic environments.
The heat needed to raise the temp of 1kg of water by 1 degree
Water has a large shc so can absorb large amounts of heat energy before its temp raises a significant amount

Question 8

Density of water

Answer 8

Water expands as it freezes. The density will increase as it expands