1. Revision 1.What does the term “arid” mean? 2.Draw the water cycle. Include: Precipitation Transpiration Evaporation Infiltration Run off Condensation 3. What is groundwater? 4. What is an aquifer? 5. Where is the Great Artesian Basin? 6. What is the Great Artesian Basin? 7. What is the water from the GAB used for? 8. What concerns farmers and environmentalists about the GAB? 9. Define the following words: Meander Channel Estuary Watershed Tributary Billabong/Cut-off Distributaries Floodplain

2. Rivers out of Balance

3. System Living things: animals, plants. Non living things: rocks, sediment (soil/dirt), water Landforms: all the parts of the river that we learnt Nutrients: tiny chemical things that give life to animals and plants but can also harm animals and plants.

4. Input Stuff going into the river Living things – plants, animals. Non-living things – sediment (dirt), rocks, water Human things – chemical pollution from farms, households and factories, rubbish, things from recreational activities. Oxygen

6. Outputs Stuff coming out of the river: Living things – plants, animals. Non-living things – animal and plant waste products. Carbon dioxide

8. Water quality The health of a water system, such as river. Divert The special place where animals and plants can survive. To change the direction of the flow of the river. Habitats

9. Salinity When salt rises from the ground and comes to the surface. This can happen in a river system or on the land.

10. Irrigation Supplying water to help plants to grow. Diverting rivers to farms to grow crops.

11. River Red Gums Eucalypt species special to Australia and special to the Murray River region. Threatened by the inputs which are putting rivers out of balance.

12. Sediment Plant and animal waste. E.g. Animal poo, feathers, branches, leaves. Debris Soil, dirt and rocks that comes off the land and is carried by the river.

13. Artificial Man made. Algal Blooms A simple aquatic (water) plant. When algae blooms it means it grows quickly and thickly.

14. Dams, weirs, reservoirs Water systems that are built to allow irrigation to happen or to store water in.

15. Carp Introduced species (feral) from Europe. Destroy the habitats of native fish. Breed (spawn) at very fast rates.