Exploring Science and Technology 2425

What is a beaker used for in the laboratory?

• A beaker is used for measuring the weight of solids.

• A beaker is used for storing gases under pressure.

• A beaker is used for conducting electrical experiments.

• A beaker is used for mixing, stirring, and heating liquids in the laboratory.

Name one type of safety equipment you should wear in a lab.

• Safety goggles

• fire blanket

• tongs

• rug

What does a Bunsen burner do?

• A Bunsen burner is a type of chemical storage container.

• A Bunsen burner provides a flame for heating and experimentation in laboratories.

• A Bunsen burner is used for cooling substances.

• A Bunsen burner generates electricity for devices.

Which atomic model proposed that electrons orbit the nucleus?

• Quantum mechanical model

• Rutherford model

• Bohr model

• Thomson model

Describe the importance of wearing goggles in a lab.

• Goggles are only needed for chemical spills.

• Goggles are primarily for fashion in the lab.

• Wearing goggles is optional in a lab setting.

• Wearing goggles protects the eyes from hazards and prevents injuries in the lab.

What is the main function of a pipette?

• To heat liquids for experiments.

• To filter impurities from liquids.

• To store solid samples safely.

• The main function of a pipette is to measure and transfer liquids.

Who proposed the plum pudding model of the atom?

• Ernest Rutherford

• Niels Bohr

• J.J. Thomson

• James Chadwick

Why is it important to know the symbols for laboratory equipment?

• To understand the history of laboratory equipment.

• To memorize the names of all laboratory tools.

• It is important to know the symbols for laboratory equipment to ensure safety and effective communication.

• To impress colleagues with technical jargon.

What does the term 'hazardous material' mean in a lab context?

• Materials that are always safe to handle in any quantity.

• Substances that are only dangerous when mixed with water.

• Items that are commonly found in a typical kitchen.

• Substances that pose a risk to health, safety, or the environment due to their properties.

Which atomic model introduced the concept of quantized energy levels?

• Bohr model

• Rutherford model

• Dalton's atomic theory

• Thomson model