1. Alfords Point Public School

2. Click on a slide, or otherwise wait until the next. • Georges River Catchment • Plankton Studies • Water Quality Testing • Environmental Issues • Animal Investigation • Fish Dissection • Pictures • Ending Credits

3. Georges River Catchment The Georges River Catchment is 196km2 . It is home to many different species of aquatic animals as well as birds. Some of these species include: pelicans, crabs, prawns/shrimp, cormorants, bream, blackfish, oysters, shags, plankton and many others.

4. Plankton is a tiny microscopic animal, and one species of it looks like this: We watch the plankton and other species swim around in less than a drop of water! There are many species of plankton in the ocean. Plankton is used for science testing. To collect plankton, you need a very fine net, like this: The only way to view a plankton is under a microscope, like these people are.

5. Water Quality Testing When we tested the water, we tested for Temperature, Phosphates, Dissolved Oxygen, Turbidity and acidity.

6. Enviromental Issues

7. Blue Swimmer Crab Walking Feet Hard Exoskeleton Tail Energy Producer Decomposer Consumer Sun Sea- grass Bacteria, Marine Fungi Nippers Fish Animal Investigation There are many different species of animals in the Georges River, and one of them is the Blue Swimmer Crab. The diagram to the right includes some of the features of the Blue Swimmer Crab. Below is a simple food chain of the Georges River.

8. Fish dissection When we dissected a fish we either dissected a bream (carnivore) or a blackfish (herbivore). Herbivore fish eat sea grasses and other sea plants. Carnivores eat other fish and molusces. • When we cut open the fish, we started at the anal hole and cut up to its teeth or its mouth. We then cut down to the end of its tail, and pulled the fish open. Some guts (organs) that we found were: • The stomach 6. The bladder • The heart 7. The air bladder • The kidneys 8. The intestines • The egg sac 9. The liver • Gills 10. The lateral line

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10. Thanks For Watching! Thanks to all those awesome people who made this day happen for all of us! Made By The 'Grime Busters'; Brent, Jake, Jamie and Jordan Happy World Environment Day!