Lab Safety/Equipment Review

When working in a lab, a student spills an unknown liquid on their skin. What is the first thing the student should do?

• Use a fire extinguisher to stop any reaction.

• Ask the teacher what the liquid is and how to proceed.

• Wash the affected area immediately in the sink or emergency shower.

• Ask to see the nurse.

When handling test tubes in the lab, students are only required to use test tube holders when the liquid has been heated or is known to be hazardous.

• True

• False

The lab equipment in the photo is known as a ______.

A watch glass can be used to

• Measure precise volumes of a liquid.

• Smother small fires from an experiment.

• Contain small volumes of a liquid for observation.

• Transfer small amounts of liquid.

A test tube rack is best used to

• Hold liquids while heating them.

• Hold a single test tube during an experiment.

• Pour liquids and solids into larger containers.

• Hold multiple test tubes during an experiment.

When conducting an experiment, the most accurate tool used for measuring the volume of a unknown liquid is a

• Beaker

• Graduated Cylinder

• Test Tube

• Erlenmeyer Flask

Broken glass should only be handled and disposed of by a teacher.

• True

• False

A digital balance is used to

• Measure the weight of an object.

• Measure the volume of an object.

• Measure the density of an object.

• Measure the mass of an object.

When heating a substance using a test tube, the test tube should be

• Held with the opening pointed away from you and others.

• Held with the opening straight up towards the ceiling.

• Held with the opening pointed towards yourself.

• Held horizontally.

When attempting to move a beaker containing a heated substance, students should use