2. Common Equipment Used In Science Class EquipmentPicture/DiagramUse Tongs Retrieving something really hot or cold Mortar and Pestle Mixing and grinding substances Alcohol Lamp Adding Heat Test Tube Clamp Holding a test tube over a hot flame safely Safety Goggles Eye Protection

3. Common Equipment Used In Science Class EquipmentPicture/DiagramUse Stopwatch Timing short periods of time Test Tube Holding Liquid and dry chemicals; heating chemicals Beaker Holding Liquid and dry chemicals; mixing chemicals; Measuring large amounts of chemicals Graduated Cylinder Measuring small amounts of chemicals Erlenmeyer Flask Holding, heating, or mixing chemicals; Microscope Observing very small objects and organisms Meter Stick Measuring length and distance

4. Common Equipment Used In Science Class EquipmentPicture/DiagramUse Eye Dropper Pipette Adding small amounts of liquids Magnifying Glass Hand lens Magnifying and observing small items Thermometer Measuring Heat Triple Beam Balance Scale Measuring mass Ring Stand Holding items up; heating beakers and flasks Funnel Pouring substances into a small opening in a container Bunsen Burner Heating substances

5. Identify the following lab equipment: Identify the following lab equipment:

9. Which piece of lab equipment would you use to measure exactly 25 mL of water? Which piece of lab equipment would you use to measure exactly 25 mL of water?

11. Which piece of lab equipment would you use to measure approximately 200 mL of water? Which piece of lab equipment would you use to measure approximately 200 mL of water?

12. Both will work! Both will work!

13. Briefly describe how you would use these objects to heat the contents of a test tube.

14. First, put on safety goggles and lab apron. Tie back long hair and check your shirt sleeves. Second, light alcohol burner with lighter. Third, remove test tube from rack and hold test tube with test tube clamp. Finally, when heating test tube, hold with clamp, place bottom of test tube over flame, and point the opening away from your face.