Choose the cylinder

The idea

Choose the measuring cylinder that measures the required volume in one step and has the smallest measurable volume, since multi-step measurement is inconvenient and larger cylinders are less accurate.

Measure 70 mL

You want to take 70 mL of water. You have 50 mL, 100 mL and 250 mL cylinders.

Which cylinder is the best choice?

• The 100 mL cylinder
• The 50 mL cylinder
• The 250 mL cylinder

Try each cylinder

Open each tab.

Pick well

Measuring in more than one step is inconvenient. A larger cylinder measures in one step but with lower accuracy.

Choose the cylinder that measures the volume in one step and has the smallest measurable volume.

Notes

Choose the cylinder that measures in one step with the smallest measurable volume.

Check yourself

To take 70 mL of water, the best cylinder among 50 mL, 100 mL and 250 mL is …

Why is a 50 mL cylinder not good for 70 mL?

Why is a 250 mL cylinder less good for 70 mL than a 100 mL cylinder?

To measure 20 mL, among cylinders of 10 mL, 25 mL and 100 mL, the best is …

• 50 mL. It cannot measure 70 mL in one step.
• 100 mL — correct. Yes!
• 250 mL. It measures in one step but with less accuracy.
• It is too accurate. The problem is that it needs two steps.
• It has no markings. It has markings, but 70 mL does not fit in one step.
• It needs more than one step — correct. Yes!
• Its smallest measurable volume is larger, so it is less accurate — correct. Yes!
• It is too short. It is not too short. It is less accurate.
• It is made of plastic. The problem is its larger smallest measurable volume.
• 10 mL. It cannot measure 20 mL in one step.
• 25 mL — correct. Yes!
• 100 mL. It can, but its smallest measurable volume is larger, so it is less accurate.