Question

Harry wants to determine how fast water will evaporate. He puts 20 mL of water in a beaker and measures how much water is left each day for four days. At the end of day 4, Harry decides to predict how much water will be left on day 5.

What would be the best estimate for the amount of water left on day 5?
A.
2 mL
B.
10 mL
C.
6 mL
D.
4 mL

Answer 1

We can look at the data Harry collected over the 4 days:

Day 1: 20 mL
Day 2: 15 mL (5 mL evaporated)
Day 3: 10 mL (5 mL evaporated)
Day 4: 5 mL (5 mL evaporated)

From this data, we can see that the water is evaporating at a rate of 5 mL per day. Therefore, on day 5, we can estimate that there will be around 0 mL of water left in the beaker.

Based on this information, the best estimate for the amount of water left on day 5 would be A. 2 mL.