Developing EVERYTHING

okay now all i need to develop all of my possible ideas and write all the variables and research and finally chose one to be the ONE!

okay here all my ideas developed:

1. HOW DOES A PHONE CONVERSATION AFFECT REACTION TIME???
i googled this and found this site and it had tips on how to do this experiment so I'm going to use this site as a reference
http://www.sciencebuddies.org/science-fair-projects/project_ideas/HumBeh_p009.shtml
i researched further and found that there were actually two ways to measure reaction time. i could use a ruler to measure or i could use a reaction measuring device on the internet; http://getyourwebsitehere.com/jswb/rttest01.html

so here are the variables;

1. independent variable- the different distractions (i.e. using hands free or hands on mobile phone and no distractions-control)
   
2. dependent variable- the reaction time
3. controlled variable- the questions asked - the same indication of when to drop the ruler - gender - age - length of where the ruler is dropped - height at which the hand is to catch the ruler - which hand is being used - same questions being asked through the phone
   

2. Next idea, i think it should be how different types of water affects plants growth;

1. independent variable- the type of water used (i.e. tap water, milk, tea, coffee, orange juice)
2. dependent variable- how long the stem grows
3. controlled variable- what type of seed is used - the amount of solution used everyday for every seed - the same location/ same amount of sunlight - same time of day when it is getting watered
   

3. STRING TELEPHONES;

1. independent variable- the length of sting between the cups
2. dependent variable- the sound coming from one can to another
3. controlled variable - the size of the can - the type of string used - the same words or sentence being talked through - the type of cup being used(plastic, paper, tin can)

4. Does colour of the pot effect the growth of plants;

1. independent variable- the colour of the pot
2. dependent variable- the growth of the plant
3. controlled variables- the type of pot - the same location - the same amount of water being used - same soil - same seed - same amount of sunlight
   

5. the effect of temperature on paint;
this idea was suggested by someone in a forum; http://classroom.all-science-fair-projects.com/forum/showthread.php?t=687

1. independent variable- the temperature (freezer or under the sun)
   
2. dependent variable- the change in colour or texture
   
3. controlled variable- the tube that is going to be painted - the colour - the type of paint - how it is placed in the different areas