Category: Grade 9

Purpose: To find out which detergent brand (Tide/medium price, Ultra/medium price, Woolite/expensive, Sunlight/cheap, Plain water/free) works the best on a stained rug. Each piece of fabric will consist of the same material, have the same type of stain, will be stirred the same quantity of time, and have an equal amount of detergent. Materials: Water,…