What melts ice fastest

A lot of things are similar....

Equipment:
Plastic cups
Water/Ice
Five substances (probably pepper, salt, sugar, soft drink, tomato sauce)
Camera
Measuring cup

Repeat experiment every Saturday to ensure accurate results.

Independent Variables

• the materials placed onto the ice.
  

Dependent Variables

• the melting rate
  

Controlled Variables

• the amount of water is equal.
• the amount of substances is equal.
• the 10 minute time span before re-checking the cups.
• repeating the experiment every Saturday
  
• the amount of sunlight exposure/room temperature