176 – 200 of 308 Classroom Resources

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  Density, Physical Properties, Matter, Observations | Elementary School, Middle School

  Lab: Comparing Density of Liquids & Solids Mark as Favorite (5 Favorites)

  In this lab, students will measure mass and volume, calculate density, and compare the density of given liquids and solids, inferring what causes objects to sink or float in a given liquid. 3-48

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  Periodic Table, Subatomic Particles, History, Introduction, Elements, Atoms, Valence Electrons, Electrons | Middle School

  Project: Elemental Art: A Visual Periodic Table Mark as Favorite (15 Favorites)

  In this activity students will research an assigned element of the Periodic Table and then create a poster that visually explains and expresses the element. The final posters can be arranged into a classroom Periodic Table.

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  Physical Properties, Molecular Structure, Polarity | High School, Middle School

  Activity: What Makes Water So Special? Mark as Favorite (56 Favorites)

  In this activity, students will become familiar with the special properties of water by completing several activities that investigate the following physical properties/phenomena: cohesion, adhesion, surface tension, and capillary action.

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  Molecular Structure , Molecular Structure, Molecular Formula, Naming Compounds, Chemical Bond, Interdisciplinary, Introduction | Middle School, High School

  Activity: Modeling Carbohydrates Mark as Favorite (17 Favorites)

  In this activity, students will identify that organic compounds contain carbon and other elements such as hydrogen and oxygen. They will investigate the structure of different organic and inorganic compounds and model several molecules, including a carbohydrate molecule. They will use their models to help understand how larger molecules are broken down into smaller molecules.

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  Chemical Change, Physical Change, Chemical Change | Middle School, High School, Elementary School

  Lab: Chemical and Physical Changes Mark as Favorite (78 Favorites)

  In this lab, students will observe and analyze a number of examples in order to determine if a chemical or physical change occurred.

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  Conservation of Mass, Chemical Change, Interdisciplinary, Culminating Project, Phase Changes, Chemical Change | Middle School, High School

  Project: Law of Conservation of Mass Comic Strip Mark as Favorite (26 Favorites)

  In this project, students will work in groups to create a comic strip that illustrates understanding of the law of conservation of mass.

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  Significant Figures, Measurements, Accuracy, Density, Accuracy, Error Analysis, Error Analysis | Middle School, High School

  Lab: Significant Figures and Lab Data Mark as Favorite (98 Favorites)

  In this lesson, students will use laboratory equipment of different precision to collect data for several different metals, and then use the data to calculate the density of each. They will then compare their calculated densities to accepted values and determine the combination of equipment that leads to the most accurate calculation of density.

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  Reaction Rate, Graphing, Temperature, Concentration | High School, Middle School

  Lab: Starch-Iodine Clock Reaction Mark as Favorite (71 Favorites)

  In this lab, students perform an iodine clock reaction to determine how concentration and temperature effect the reaction rate.

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  Exothermic & Endothermic, Physical Change, Temperature, Freezing Point, Boiling Point | High School, Middle School

  Demonstration: Energy Mark as Favorite (10 Favorites)

  In this demonstration, students will observe the exothermic and endothermic properties of state changes of substances with different freezing and boiling points.

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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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  Atomic Theory, Electrons, Model of the Atom, Subatomic Particles, History | Elementary School, Middle School, High School

  Video: Niels Bohr Video Mark as Favorite (69 Favorites)

  This video tells the story of Niels Bohr, a great scientist who redefined how we think about atoms and the electron. Bohr’s model of the atom helped to advance understanding of subatomic particles, and holds an important place in the history and development of the atomic theory.

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  Model of the Atom, Subatomic Particles, Atomic Mass, Valence Electrons, Atoms, Periodic Table, Elements | Middle School, High School

  Activity: Mystery Elements Mark as Favorite (73 Favorites)

  The students will work in cooperative groups to construct Bohr models of "mystery" elements and record missing information about each element. Students will also create a new "mystery" element card for a classmate to analyze and determine its identity.

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  Periodic Table, History | Elementary School, Middle School, High School

  Video: Aluminum Video Mark as Favorite (3 Favorites)

  In this video, Sam Kean tells stories about aluminum.

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  Model of the Atom, Periodic Table, Subatomic Particles, Electrons, Valence Electrons, Ions | High School, Middle School

  Lab: Sweet Model of the Atom Mark as Favorite (63 Favorites)

  In this lesson, students will use different candies to represent electrons, protons, and neutrons to gain a better understanding of atoms, ions, and isotopes.

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  Temperature, History, Accuracy, Physical Properties | Elementary School, Middle School, High School

  Video: The Temperature Guys Video Mark as Favorite (80 Favorites)

  This video tells the story of how temperature as we currently know it evolved. The first thermometers invented in the early 1600s are very different than ones we use today!

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  Periodic Table, History, Physical Properties | Elementary School, Middle School, High School

  Video: Silicon Video Mark as Favorite (8 Favorites)

  In this video, Sam Kean tells stories about silicon.

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  Gas Laws, Pressure, Volume, History | Elementary School, Middle School, High School

  Video: Robert Boyle Video Mark as Favorite (40 Favorites)

  This video tells the story of Robert Boyle, a great chemist and discoverer of Boyle's Law, which describes the relationship between pressure and volume of a gas.

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  Atomic Radius, Ionic Radius, Electrons, Model of the Atom, Subatomic Particles, Periodic Table | Elementary School, Middle School, High School

  Animation: Atomic & Ionic Radii Animation Mark as Favorite (70 Favorites)

  This animation explores patterns in atomic and ionic radii. Students will look at the different sizes of atoms in the third period and the atoms in the sixth group to see trends across periods and down groups. They will also look at an atom and its corresponding cation as well as an atom and its corresponding anion. **This video has no audio**

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  Molecular Structure, Molecular Geometry, History, Periodic Table, Molecular Structure | Elementary School, Middle School, High School

  Video: Phosphorous Video Mark as Favorite (10 Favorites)

  In this video, Sam Kean tells the story of how phosphorus was at the center of the race to discover the structure of DNA.

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  Periodic Table, History | Elementary School, Middle School, High School

  Video: Mercury Video Mark as Favorite (12 Favorites)

  In this video, Sam Kean tells stories about Mercury.

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  Radioactive Isotopes, Radiation, Half Lives, History | Elementary School, Middle School, High School

  Video: Marie Curie Video Mark as Favorite (28 Favorites)

  This video tells the story about Marie Curie, including her Nobel Prizes, radiation experiments, and discovery of new elements. Irene Curie is also mentioned.

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  Periodic Table, History | Elementary School, Middle School, High School

  Video: Manganese Video Mark as Favorite (5 Favorites)

  In this video, Sam Kean tells stories about manganese.

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  Periodic Table, History, Physical Properties | Elementary School, Middle School, High School

  Video: Gallium Video Mark as Favorite (8 Favorites)

  In this video, Sam Kean tells stories about gallium.

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  Radioactive Isotopes, History, Subatomic Particles, Model of the Atom, Atomic Theory | Middle School, High School

  Video: Ernest Rutherford Video Mark as Favorite (71 Favorites)

  Rutherford's initial research was studying alpha particles, which he hypothesized were helium nuclei. With the help of Hans Geiger, Rutherford conducted the gold foil experiment, which justifies that the nucleus of an atom is a dense collection of protons and contains the majority of an atom’s mass. It also inferred that most of the atom is empty space and electrons are not located in the nucleus. He won the Nobel Prize in chemistry in 1908 for his studies on radioactive substances.

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  Atomic Mass, Atomic Theory, Model of the Atom, Subatomic Particles, Periodic Table, History | Elementary School, Middle School, High School

  Video: Dimitri Mendeleev Video Mark as Favorite (69 Favorites)

  This video tells the story of how Dimitri Mendeleev organized the periodic table, even leaving gaps to be filled in with elements that weren't yet discovered.