Question

percy likes to drink hot tea, and his friend likes to drink cold tea. percy notices that the sugar he adds to his tea dissolves faster than the sugar he adds to his friends tea. he wonders what factors affect how quickly sugar dissolves in liquids. so, he decides to design an experiment. he has the following supplies available: two identical glass bowls, a bag of white sugar, a bag of brown sugar, warm water, cold water, a stopwatch. using only these supplies, which two questions can percy investigate with an experiment? does white sugar dissolve more quickly in warm water or in cold water? does brown sugar dissolve in water more quickly than powdered sugar does? does white sugar dissolve more quickly in warm water or in warm coffee? does white sugar dissolve in warm water more quickly than brown sugar does?

Explanation:

Step1: Analyze available supplies

He has white sugar, brown sugar, warm water, cold water and stop - watch.

Step2: Evaluate each question

• For "Does white sugar dissolve more quickly in warm water or in cold water?": He can use white sugar, warm water, cold water and stop - watch to measure the time of dissolution.
• For "Does brown sugar dissolve in water more quickly than powdered sugar does?": He doesn't have powdered sugar, so can't test this.
• For "Does white sugar dissolve more quickly in warm water or in warm coffee?": He doesn't have warm coffee, so can't test this.
• For "Does white sugar dissolve in warm water more quickly than brown sugar does?": He has white sugar, brown sugar, warm water and stop - watch to measure the time of dissolution.

Answer:

Does white sugar dissolve more quickly in warm water or in cold water?
Does white sugar dissolve in warm water more quickly than brown sugar does?