Standard Science Primary 5 Cycles

Jun Jie hung two identical wet towels, X and Y, out to dry. He folded towel X in half but spread towel Y out completely. Towel Y dried faster. What does this experiment show?

A Evaporation only happens under the Sun.
B Evaporation is faster when the exposed surface area is larger.
C Evaporation is faster when there is wind.
D Evaporation is faster at higher temperatures.
Show Worked Solution

Worked Solution

Step 1: Identify the independent variable (what was changed): The way the towels were hung (folded vs. spread out). Step 2: This changes the exposed surface area. Step 3: Towel Y had a larger exposed surface area and dried faster, proving that a larger surface area increases the rate of evaporation.

Correct answer: Evaporation is faster when the exposed surface area is larger.

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free