Laboratory Equipment and Safety Practices

What is a beaker primarily used for in a science lab?

• Precisely measuring liquid volumes

• Holding, mixing, and heating liquids and solids

• Growing microorganisms

• Measuring temperature

What is the main purpose of a test tube?

• Storing large quantities of chemicals

• Accurately measuring liquid volumes

• Holding, mixing, heating, or observing small samples

• Creating a vacuum

Which piece of equipment is best for precisely measuring and transferring liquid volumes?

• Beaker

• Test tube

• Graduated cylinder

• Erlenmeyer flask

What is a key feature of an Erlenmeyer flask?

• It has a rounded bottom for small-scale experiments.

• It is used to measure temperature.

• It has a wide, flat bottom and a narrow, tapered neck.

• It is designed for growing microorganisms.

What is a Petri dish used for in a laboratory?

• Mixing and heating large volumes of liquids

• Precisely measuring small liquid volumes

• Providing a controlled environment for growth and observation of samples

• Transferring solids between containers

What is the primary function of a pipette?

• Heating substances to high temperatures

• Storing chemicals long-term

• Precisely measuring and transferring small, specific volumes of liquids

• Filtering solid particles from liquids

What does a thermometer measure?

• Volume of liquids

• Mass of solids

• Temperature of a substance or environment

• Acidity of solutions

What is a Bunsen burner primarily used for?

• Storing flammable gases

• Producing a single, steady, and adjustable flame for heating

• Measuring the density of liquids

• Observing chemical reactions at room temperature

How should you read the volume markings on a graduated cylinder?

• From above, looking down.

• From below, looking up.

• At eye level, to avoid parallax errors.

• By shaking the cylinder to mix contents.

What is a key safety practice when pipetting liquids?

• Pipette liquids quickly to save time.

• Avoid wearing gloves to improve grip.

• Pipette liquids slowly and carefully to avoid bubbles or spills.

• Reuse pipette tips to save resources.