Questions and Answers
Which of the following is used for mixing, heating, and holding liquids during experiments?
What is a burette?
A long, graduated glass tube used in chemistry for measuring liquids and gases.
What is the function of a funnel in a laboratory?
A graduated cylinder provides a greater margin of error than a beaker.
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What do you call a device used to clean test tubes?
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What should be worn in any area where chemicals are used?
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Which statement is true about the respiratory system?
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What is the primary gas exchanged by the respiratory system?
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The respiratory system is responsible for the exchange of gases, primarily __________ and carbon dioxide.
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Study Notes
Laboratory Apparatus and Their Uses
- Laboratory apparatus refers to tools and equipment used in scientific settings for experiments, data collection, and analysis.
- Beakers: Versatile containers for mixing, heating, and holding liquids.
- Test Tube: Finger-like glass container for holding small amounts of substances during experiments.
- Erlenmeyer Flask: Conical flask used for various liquid-handling processes; named after inventor Emil Erlenmeyer.
- Volumetric Flask: Used for measuring accurate volumes of liquids; more precise than beakers and graduated cylinders.
- Graduated Cylinder: Designed for accurate liquid measurements; smaller error margin compared to beakers, typically within 0.5-1%.
- Pipette: Tool for measuring and transferring precise volumes of liquids common in analytical chemistry and titrations.
- Burette: Graduated glass tube for measuring liquids and gases in chemistry applications.
- Funnel: Guides liquid or powder into small openings; made of materials like stainless steel, glass, or plastic.
- Clamp: Secures and supports other laboratory items during experiments.
- Test Tube Brush: Used for cleaning test tubes and narrow laboratory glassware.
- Test Tube Holder: Keeps test tubes in place, especially when hot.
- Test Tube Stand: Supports test tubes upright to prevent breakage or spillage.
- Bunsen Burner: Heats, combusts, and sterilizes substances in high-heat applications.
- Petri Dish: Cultures cells, including bacteria and molds, for scientific observation.
- Glass Rod: Mixing tool for chemicals and liquids.
- Tongs: Used for grasping and lifting heat-resistant materials during high-temperature reactions.
- Tripod for Bunsen Burner: Provides stability for various lab apparatus.
- Wire Mesh Gauze: Heat-resistant surface for containers to distribute heat evenly.
- Mortar and Pestle: Grinds solid chemicals into fine powder and crushes solids into smaller pieces.
- Triple Beam Balance: Mechanical weighing instrument for accurate measurements without power.
Common Laboratory Safety Rules
- Familiarize yourself with the locations of safety showers and eyewash stations for emergency use.
- Know emergency exit routes for quick evacuation.
- Avoid contact between skin/eyes and chemicals to prevent injuries.
- Minimize exposure to chemicals throughout experiments.
- Prohibit horseplay in the laboratory environment.
- Wear laboratory goggles or safety glasses in areas where chemicals are present.
- Post warning signs for hazardous materials and conditions to alert personnel.
- Prohibit the use of cell phones or earbuds in active lab areas to maintain focus and safety.
- Avoid wearing jewelry, which can pose safety hazards during experiments.
Respiratory System
- The respiratory system facilitates the exchange of gases (oxygen and carbon dioxide) between the body and the environment.
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Description
Test your knowledge of laboratory equipment and safety rules in this Science 9 review quiz. Learn about various tools, their uses, and the essential safety guidelines that ensure a safe working environment in scientific experiments.
