Experimental Design/Practice

Ok so your probably like this is nice, but what should I expect to get at competition. So here's some sample list of materials and topics. have fun :D (oh most of these I actually had in competition)

List 1
Make an experiment using gravity as a factor. 3 rubber balls(different sizes and colors), foot of masking tape, 10 rubber bands, meter/yard stick, plastic spoon, block of styrofoam, 10 Popsicle sticks,

List 2
No topic just go wild with it 2 toy cars, 5 rubber bands, push pins (unlimited), meter/yard stick, 3 1'x1'sheets of cardboard, 5 1'x1/2'' sheets of cardboard, 5 1'X1/4'' sheets of cardboard,

List 3
Use temperature as a factor: Thermometer Hot and cold water (aka sink), cup of sugar, cup of salt, cup of MSG , beakers (unlimited), 10 plastic spoons, toothpaste (unlimited), hair gel (unlimited),

List 4
Something has to roll 5 marbles, 1 can, 1 foot of sand paper, a small pegboard, 4 dictionaries, a sharpie, foot of masking tape, foot of PVC pipe,

List 5
You must use the water 10 cotton balls, 4 breakers, cup of sand, cup of salt, bottle of water (bottle may be used), measuring cups, plastic wrap, 10 cotton swabs,

List 6
No topic have fun this is really gonna test you;) stick of gum, cup of juice, cup of soda water, cup of chex mix, 10 plastic cups, 5 plastic spoons, meter/yard stick,

List 7
Must relate to chemistry 10 plastic spoons, 1/2 cup of lemon juice, 4 plastic bottles, cup of baking soda, 1/4 cup of vinegar,

List 8
No topic 3 markers, 10 sheets of plain white paper, 3 pencils, 3 crayons, 2 rulers,

List 9
You must use electricity one buzzer, one lemon, one tomato, one battery, one penny, one paper clip, one ice bath, one hot plate, thermometer,

List 10
You must use basic physics 10 note cards, 2 sheets of sand paper, cup of salt, 5 marbles, a toy car, foot of tape, 10 paper clips, hope these list help and have fun(more to come)