Science - Chemistry
Students will understand chemical bonding and the relationship of the type of bonding to the chemical and physical properties of substances.
Relate the properties of simple compounds to the type of bonding, shape of molecules, and intermolecular forces.
Ammonia, Methane, Water
Students will compare the shapes of the ammonia, methane, and water molecules.
In this activity, students marble paper with shaving cream and food color while exploring water, polarity, and hydrophilic and hydrophobic materials. Although the activity is familiar, it contains a new twist--exploring how a colored shaving cream mixture behaves when a drop of water is added.
Students will compare water, ammonia and methane shapes and resulting polarity by using their text. They will summarize their results on a table. The second part is a newscast the students write showing changes on Earth that would result if water were replaced by ammonia or methane.
Students will group a selection of electron dot structures and determine similarities and differences between covalent and ionic bonding.
I've Been Slimed Lab
Students will conduct a lab making a slime-like material in order to answer the question "How does cross-linking change the properties of a polymer?"
Ionic or Molecular?
Students will test and observations six compounds and determine whether they are molecular or ionic. They will test general appearance, melting point and the electrical conductivity of water solutions.
K'Nex Hydrogen Bonding
In this activity, students build models of polarized water molecules using K'Nex toy components and adhesive Velcro. Students investigate hydrogen bonding by shaking the models in various ways. They observe the resulting interactions and relate their observations to physical states of water and the difference between strong bonds and weak attractions.
Students use molecular model kits to visualize molecule shapes, determine polarity of molecules, and to help them draw accurate Lewis structures for various molecules.
Polymers: From Chemistry to Global Consequences
The definition of a polymer is a chain composed of carbon-based molecules called monomers. Examples of polymers can be found in synthetic compounds such as plastics or in natural compounds such as proteins and chitin. The purpose of this lesson is to teach students the nature and properties of polymers, including how to make them and the environmental hazards they produce.
Properties of Common Substances
Students will test the properties of some common substances and use their findings to identify an unknown mixture. They will relate the properties of the substances to the type of bonding they represent.
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