1. water conservation
1.1. limited resource
1.1.1. important to keep living things alive
1.1.1.1. plants
1.1.1.1.1. photosynthesis
1.1.1.1.2. respiration
1.1.1.1.3. growth
1.1.1.2. animals
1.1.1.2.1. digestion
1.1.1.2.2. circulatory
1.1.1.2.3. remove heat from the body
1.1.1.2.4. body contains mainly of water
1.1.1.2.5. hygiene
1.1.2. ways to conserve water
1.1.2.1. water the plants with watering cans
1.1.2.2. flushing
1.1.2.2.1. select low flush cistern
1.1.2.2.2. recycle the water from the washing machine
1.1.2.3. washing
1.1.2.3.1. put thimbles in all taps
1.1.2.3.2. shower with a pail of water
1.1.2.3.3. brush teeth with a mug of water
1.1.2.3.4. recycle the water used for the washing machine
2. Pollution
2.1. river
2.2. ocean
2.3. lake
2.4. reservior
3. 3 states
3.1. solid
3.1.1. ice
3.2. liquid
3.2.1. water
3.3. gaseous
3.3.1. water vapour
4. change of state
4.1. water cycle
4.1.1. gaseous to liquid
4.1.1.1. condensation
4.1.1.1.1. lose heat
4.1.2. liquid to gaseous
4.1.2.1. evaporation
4.1.2.1.1. gain heat
4.1.3. ensure there is continuous water supply on earth
4.2. solid to liquid
4.2.1. melting
4.2.1.1. gain heat
4.2.1.1.1. eg ice to water