Question

1. practice instrument measurements: be as accurate and precise as possible. graduated cylinder with liquid. read the meniscus (dip in the liquid) student response

Explanation:

To solve for the volume in each graduated cylinder, we analyze the scale and meniscus:

First Cylinder (Left)

Step 1: Determine the scale

The markings are at 6, 7, 8. The space between 6 and 7 (or 7 and 8) has 5 small divisions. So each small division is $\frac{7 - 6}{5} = 0.2$ (or $\frac{8 - 7}{5}=0.2$).

Step 2: Read the meniscus

The meniscus is at 6.6 (since it's 3 small divisions above 6: $6 + 3\times0.2 = 6.6$).

Second Cylinder (Middle)

Step 1: Determine the scale

The markings are at 20, 30, 40, 50, 60. The space between 20 and 30 (or others) has 5 small divisions. So each small division is $\frac{30 - 20}{5}= 2$.

Step 2: Read the meniscus

The meniscus is at 38 (since it's 4 small divisions above 30: $30+ 4\times2=38$).

Third Cylinder (Right)

Step 1: Determine the scale

The markings are at 1, 2, 3. The space between 1 and 2 (or others) has 5 small divisions. So each small division is $\frac{2 - 1}{5}=0.2$.

Step 2: Read the meniscus

The meniscus is at 2.6 (since it's 3 small divisions above 2: $2 + 3\times0.2=2.6$).

Answer:

First Cylinder: $\boldsymbol{6.6}$ (units, e.g., mL)
Second Cylinder: $\boldsymbol{38}$ (units, e.g., mL)
Third Cylinder: $\boldsymbol{2.6}$ (units, e.g., mL)