Mass Material Temperature Practice Test

Three 200 g samples (water, oil, and sand) are all heated to $80^\circ\text{C}$ and then left to cool for 10 minutes in the same room. After 10 minutes, their temperatures are:

• Water: $65^\circ\text{C}$
• Oil: $58^\circ\text{C}$
• Sand: $52^\circ\text{C}$ Which material cooled the slowest over the 10 minutes?

Three beakers of water start at 20°C and are heated on the same burner until they reach 80°C. The masses and heating times are shown.

• 100 g → 2 min
• 200 g → 4 min
• 400 g → 8 min

Which statement best describes the relationship between mass and heating time in this investigation (with the burner and temperature change kept the same)?