Chemistry Safety and Skills :
Students will learn the power of experimentation, evaluation and deduction, as well as the recognition that science is both a body of knowledge and an evidence-based, model-building enterprise that continually extends, refines, and revises knowledge. This unit focuses on the importance of practicing safety in the lab, the use of scientific equipment and basic lab skills, and reviewing basic scientific concepts and terminology from previous science courses.
Vocabulary words:
Beaker, Erlenmeyer flask, wire gauze, ring stand, graduated cylinder, pipet, dropper, bunsen burner, rubber tubing, test tube rack, test tube, stopper, tongs (crucible, beaker), filter paper, funnel, spatula, weigh boat, buret, hot gripper, hot plate, glass rod, burner striker, fire blanket, safety goggles, eye wash, emergency shower, metric system, grams, liters, meters, volume, mass, density, substance, physical property, chemical property, solid, liquid, gas, vapor, physical change, chemical change, mixture, heterogeneous mixture, homogeneous mixture, solution, alloy, filtration, distillation, element, compound, chromatography, chemical reaction, reactant, product, precipitate, Conservation of Mass, matter.
Student Objectives
● Conduct lab experiments using proper science equipment and safety protocols.
● Measure physical quantities accurately using the metric system.
● Calculate a substance’s density.
● Differentiate between the characteristics of different states of matter.
● Classify different types of mixtures.
● Demonstrate how mixtures can be separated.
● Identify chemical and physical changes that take place to a substance
Hands on activities/ Department Activities
● Safety Lesson Options: Jigsaw safety topics to groups of students and have students create a visual (poster/ whiteboard) to “teach” class, or Safety First POGIL: https://drive.google.com/open?id=0B0XImXxS1gxJZ1dRd0hzd0h5Mzg
Flinn safety contract discussed and signed. Lab safety equipment (shower, eyewash) demonstrated. Include safety symbols to be used on lab handouts: https://drive.google.com/open?id=0B0XImXxS1gxJdUdDNW1sNFgyQ2c
Lab safety quiz: https://drive.google.com/open?id=0BzX0zxQ8dB0tZlozWWlEd1JXakU
● Review Chemistry Lab Equipment: Students identify the equipment in the lab using the reference sheet and actual equipment: https://drive.google.com/drive/folders/0B0XImXxS1gxJVmtlM1JKei1QZHM
● Measurement Lab: Students practice using measurement tools (balances, volume in different containers) at different stations; briefly discuss and practice measuring to the correct number of significant figures. https://drive.google.com/drive/folders/0B0XImXxS1gxJMGRwRkRFVkxuRzA
● Density activities: Density calculating lab: https://drive.google.com/open?id=0B0XImXxS1gxJeWRzWFE2MXFNblE/
Density Column Prediction and Observation Lesson (as demo or lesson)
Density Graphing Activity: https://drive.google.com/open?id=0B0XImXxS1gxJOXI2d2pSUkU5d00
● Chemical/Physical changes observations as a class demo: https://drive.google.com/open?id=0B0XImXxS1gxJOXFtNTJNNXZhOTA
● Chromatography Activity to introduce mixtures and separation techniques:
https://drive.google.com/open?id=0B0XImXxS1gxJdGRpbzJwcy14d1k
● Separate Iron from Cereal activity: Students practice using chemistry equipment to separate a mixture. https://drive.google.com/open?id=0BzX0zxQ8dB0tX1VLenh5NWVoV3c
● Student-Designed Filtration Lab: Student groups are given a mixture, then they design a lab procedure to separate the mixture components. Students need to get approval of their procedure, equipment and safety prior to performing the lab.