Visit the school or local library and carry out extensive reading into the animal world before deciding what you will specifically study during your project. You could choose to examine the make up of different animal cells and compare them to those of humans, for example. Read a wide range of sources, such as written resources from the library and content taken from academic websites, which typically end with a ".edu" domain name.
Conduct the experiment at the center of your seventh-grade animal science project, such as an investigation to see the amount crickets chirp at different air temperatures. Leave plenty of time to carry out your experiment -- at least 10 evenings of testing if you are studying cricket chirps and temperature. Pick one fixed location and perform your cricket chirp counting at the same time each evening by first measuring the air temperature before tallying the number of cricket chirps you hear in a two-minute window.
Showing the results of any experiments or surveys carried out during your project on your science fair stall is key. Quantify any numerical answers, make and enlarge graphs of the results so you can pin them on your stall. Where results cannot be easily displayed in graph form, such as an experiment watching the behavior of ants in an ant farm, take plenty of photographs to show the different behaviors and trends observed. For example, if you leave a small, sugar cube-sized piece of bread at the top of your ant farm, you will observe worker ants carrying it into the depths of the ant farm for more senior members of the farm, as ants operate something of a caste system.
Demonstrate your awareness and appreciation of health and safety when presenting your seventh-grade science fair project. Health and safety is an important aspect of any science project, so showing your commitment to completing safe experiments and research will impress the science fair judges. When experimenting with animal fat, for example, you should demonstrate the safety equipment, such as rubber gloves, you wore and the care you exercised when handling hot water. Furthermore, you should always attach a disclaimer to your animal science project outlining how you protected any ecosystems you studied and how you acted to cause the least disruption possible to animals.