26 – 50 of 54 Classroom Resources

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  Electromagnetic Spectrum, Atomic Spectra, Electrons, Identifying an Unknown | High School

  Lab: The Case of the Contaminated Well Mark as Favorite (110 Favorites)

  In this lab, students will observe the colors produced when different metal salt solutions are heated in a flame. Students will take on the role of a forensic investigator and use their results to help them determine if collected evidence was contaminated.

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  Calorimetry, Specific Heat, Identifying an Unknown | High School

  Lab: The Search for a Hit and Run Suspect Mark as Favorite (96 Favorites)

  In this lab, students will determine the specific heat capacity of multiple unknown metal samples through collecting data and completing calorimetric calculations. Students will take on the role of a forensic investigator and use their results to help them determine if a suspect’s vehicle was potentially involved in a hit and run incident.

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  Dimensional Analysis, Mole Concept, Measurements, Density, Identifying an Unknown, Molar Mass | High School

  Lab: Chemistry Composition Challenge Mark as Favorite (119 Favorites)

  In this inquiry based lab, students will design a method to solve three chemistry problems involving moles, molecules, and density.

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  Electromagnetic Spectrum, Identifying an Unknown | Middle School, High School

  Video: Color Matching Paint Video Mark as Favorite (13 Favorites)

  This video explains how technology, specifically focusing on spectrophotometry, can be used for paint matching. Students will learn how the spectrophotometer interacts with the spectrum of visible light in order to match or reproduce specific paint colors.

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  Indicators, Identifying an Unknown | Middle School, High School

  Lab: Indicators of Acids and Bases Mark as Favorite (32 Favorites)

  In this lab, students will use various indicators to identify unknown (clear) solutions as acidic, basic, or neutral.

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  Atomic Spectra, Emission Spectrum, Emission Spectrum, Electromagnetic Spectrum, Interdisciplinary, Identifying an Unknown | Middle School, High School

  Lab: Spectral Detective Mark as Favorite (33 Favorites)

  In this lab, students will use a spectroscope to view the atomic spectra of various unknown elements. Using their collected data in combination with known atomic spectra, they will identify the chemical elements.

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  Periodic Table, History, Identifying an Unknown | Elementary School, Middle School, High School

  Video: Cadmium Video Mark as Favorite (6 Favorites)

  In this video, Sam Kean tells stories about cadmium.

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  Periodic Table, History, Identifying an Unknown | Elementary School, Middle School, High School

  Video: Arsenic Video Mark as Favorite (37 Favorites)

  In this video, Sam Kean tells stories about arsenic, a deadly element that was once referred to as the "Inheritance Powder".

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  Limiting Reactant, Percent Yield, Stoichiometry, Balancing Equations, Net Ionic Equation, Concentration, Molarity, Precipitate, Solubility, Dimensional Analysis, Mole Concept, Observations, Graphing, Separating Mixtures, Identifying an Unknown | High School

  Lab: White Lab Mark as Favorite (55 Favorites)

  In this lab, students use molarity concepts to review limiting reactant concepts mathematically, conceptually, and graphically. They can then carry out a follow up investigation to identify an unknown using concepts learned in the first investigation.

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  Physical Change, Chemical Change, Identifying an Unknown, Acid Base Reactions | Middle School

  Lab: Is It a Hoax? Mark as Favorite (14 Favorites)

  In this lab, students will perform tests on the physical and chemical properties of different substances to determine the identity of the unknown.

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  Periodic Table, History, Physical Properties, Chemical Properties, Elements, Identifying an Unknown, Atoms, Atomic Radius, Ionic Radius, Ionization Energy, Electron Affinity, Valence Electrons, Electrons, Subatomic Particles, Ions, Model of the Atom | High School

  Lesson Plan: The Periodic Table Unit Plan Mark as Favorite (79 Favorites)

  The AACT high school classroom resource library and multimedia collection has everything you need to put together a unit plan for your classroom: lessons, activities, labs, projects, videos, simulations, and animations. We constructed a unit plan using AACT resources that is designed to teach the Periodic Table to your students.

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  Physical Properties, Intermolecular Forces, Identifying an Unknown, Experimental Design, Scientific Method, Error Analysis, Graphing, Molecular Structure | High School

  Lesson Plan: The Importance of Motor Oil Viscosity in Optimal Car Functioning Mark as Favorite (16 Favorites)

  In this lesson students will determine how temperature affects viscosity and relate the data to the structure of motor oil and the optimal functioning of a car.

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  Identifying an Unknown, Culminating Project, Classification of Reactions, Experimental Design, Scientific Method, Interdisciplinary, Review, Balancing Equations, Stoichiometry, Concentration, Molarity | High School

  Lab: The Culminating Unknown Mark as Favorite (35 Favorites)

  In this lab, students identify an unknown from a list of 12 possible compounds by designing a procedure and using evidence to prove their claim. They must draw from knowledge gained throughout the year to properly develop a procedure to identify the unknown.

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  Solubility, Intermolecular Forces, Intermolecular Forces, Mixtures, Intramolecular Forces, Polarity, Observations, Physical Properties, Chemical Properties, Identifying an Unknown, Mixtures | High School

  Lab: Solubility & Compound Type Mark as Favorite (41 Favorites)

  In this lesson, students determine whether unknown substances are polar, nonpolar, or ionic by testing their solubilities.

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  Chemical Change, Conservation of Matter, Identifying an Unknown, Culminating Project, Elements | Middle School

  Lab: Priestley Labs Mark as Favorite (3 Favorites)

  In this lab, students will identify an unknown gas based on experimental evidence.

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  Density, Error Analysis, Accuracy, Identifying an Unknown, Physical Properties, Accuracy, Error Analysis, Measurements, Significant Figures | High School, Middle School

  Lab: Determining the Density of Liquids and Solids Mark as Favorite (39 Favorites)

  In this lab, students will experimentally determine the density of several liquids and solids from mass and volume measurements. They will then identify an unknown metal by comparing its density to that of known metals and calculate the percent error within the class for a specific sample.

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  Periodic Table, Elements, Matter, Physical Properties, Chemical Properties, Observations, Identifying an Unknown | High School, Middle School

  Lab: Periodic Table Trends Mark as Favorite (31 Favorites)

  In this lab, students will investigate trends of the periodic table by examining samples of six elements. Students will use observations about the elements’ appearance, conductivity, and malleability to determine whether they are metals, nonmetals, or metalloids. They will also see how these elements, as well as two more in a teacher demo, react with water and use this information to make claims about reactivity patterns in the periodic table.

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  Pharmaceuticals, Functional Groups, Identifying an Unknown, Chemical Properties, Observations | High School

  Lab: Over the Counter Drugs Mark as Favorite (42 Favorites)

  In this lab, students will do some research about common over the counter drugs and then carry out some chemical tests to learn more about their composition. They will then identify an unknown drug sample.

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  Density, Observations, Inferences, Measurements, Identifying an Unknown, Error Analysis, Scientific Method | High School

  Lab: Colors of the Rainbow Mark as Favorite (38 Favorites)

  In this lab, students will practice density calculations and put their calculations to test by creating their own density column.

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  Atomic Spectra, Emission Spectrum, Emission Spectrum, Electromagnetic Spectrum, Interdisciplinary, Identifying an Unknown | Middle School, High School

  Lab: Build a Spectroscope Mark as Favorite (26 Favorites)

  In this lab, the students will make and use a spectroscope to identify the spectra within various types of light bulbs. The students will then develop an improved design for the spectroscope.

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  Chemical Change, Identifying an Unknown, Physical Properties, Chemical Properties, Chemical Change, Experimental Design, Scientific Method | High School, Middle School

  Lab: As Easy as Pie Mark as Favorite (62 Favorites)

  In this lab, students will use chemical and physical properties to identify an unknown powder.

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  Percent Composition, Identifying an Unknown, Net Ionic Equation, Stoichiometry, Error Analysis, Molar Mass | High School

  Lab: Analysis of Carbonate Compounds Mark as Favorite (58 Favorites)

  In this lab, students calculate the molar masses of three unknown carbonate compounds by measuring the amount of product (CO2) produced by a reaction with hydrochloric acid.

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  Chemical Change, Solute & Solvent, Observations, Inferences, Physical Change, Identifying an Unknown | Elementary School

  Lesson Plan: Alien Invasion? Mark as Favorite (2 Favorites)

  In this lesson, students will explore both physical and chemical changes as they try to help the Department of Homeland Security analyze and identify materials found in a mysterious capsule. Students will examine and observe an unknown object (a frozen water balloon) as it changes (melts). They then mix combinations of everyday substances to observe chemical changes.

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  Periodic Table, Identifying an Unknown, Introduction | High School

  Activity: Periodic Table of Aliens Mark as Favorite (95 Favorites)

  In this activity, students will receive a deck of cards with images of aliens with various physical features that they have to organize into groups and periods following patterns in those features. Two cards are removed from each deck, and after students organize the cards, they can predict (draw) the missing aliens. They then watch a short video about Mendeleev to help them relate their process for organizing their alien cards to how Mendeleev organized the elements of the periodic table and predicted where undiscovered elements would fit.

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  Gas Laws, Molar Mass, Density, Temperature, Pressure, Volume, Ideal Gas, Physical Change, Observations, Density, Identifying an Unknown, Error Analysis | High School

  Lab: Molar Mass of Dry Ice Mark as Favorite (14 Favorites)

  In this lab, students will use gas laws to calculate the molar mass of dry ice and then use the information to identify the compound that makes up this substance.