Physical State and Chemical Composition
Do Now – Phases of Matter
Present the following items in a gallery walk
Identify the following items as solid, liquid, or gas:
ØWhipped Cream Can
ØWhipped Cream Fizz
Feeling comfortable? Let’s kick it up a notch. Identify the following items as solid, liquid, or gas:
Why is this new batch of items harder to identify? What rules govern when an object is solid, liquid or gas?
2 Direct Instruction
Explain everything will present an overview of a large number of colloids such as foam, milk, smoke, aerosols, gels, and clouds. They will explore how each of these is a mixture of two phases of matter and how scientific guidelines are necessary to dictate and differentiate each from each other.
There will be an overview of particle theory along with how temperature and pressure play a role in the phase of any substance. Elements, compounds, and mixtures will be identified based on their definitions, and students will be asked to separate various substances into each of these three categories.
3 Guided Practice
Mini-Lab: Aluminum Foil and Pool Cleaner
Students will use the iPad camera to record the process that occurs when pool cleaner (HCl) is added to aluminum foil. The wax surrounding the foil melts, and the reaction occurs.
The iMovie app will be used to slow down the video and draw descriptions of where physical and chemical changes are occuring, and what characteristics back up their observations. Students will highlight and annotate their film and answer questions such as:
–What state of matter are each of the components in before the reaction? How about the composition?
–What state of matter are each of the components in after the reaction? How about the composition?
4 Independent Practice
Students will take pictures of the previous reaction beween Aluminium and Hydrochloric acid at the initial stage, intermediate stage, and final stage before uploading images to Thinglink. All students will have a rubric to compare their pictures to for quality control assurance purposes. They will identify the pure substances, mixtures, elements, compounds, as well as the various states of matter.
The thinglink should include an overview of all states of matter including multimedia and background research and justify how students differentiated between pure substances, mixtures, elements, and compounds.
These will be posted on a class-wide digital post-it board and will be assessed by the whole class.
Students will analyze the thinglinks posted to padlet and come up with a consensus as to what consitutes an element, compound, mixture, or pure substance. They will be asked to get in groups and delegate bringing in examples of all of the aforementioned subjects.
The best thinglinks will be praised, and the students who struggled signficantly will be marked for remediation and assisted in the upcoming lesson.