Collision theory / kinetic theory crossword Do Now Students are required to 'fill in the gaps' to complete the crossword. The purpose is to check their understanding about the collision theory and how scientists can increase rates of reaction. This resource tests students on 7 words which are present at the bottom of the worksheet in a 'word bank'. To differentiate this resource for more able students, you could remove the word bank. The 7 solutions are: activation, collide, energy, kinetic, orientation, speed, temperature

Year 7 or 8 Do Now on elements, compounds and the periodic table. Students have to identify metals and non-metals using the periodic table, then have to determine the number of atoms in compounds, eg. 2 x hydrogen and 1 x oxygen in water.

Year 7 or 8 worksheet on metals and non-metals. A quick check for understanding on the properties of metals and non-metals

Shapes of ions and molecules lesson for year 12 or year 13 (AS level or A level). LOs: To state the basic features of a molecule that determine its shape. To describe different molecular structures. To predict the shapes of simple molecules and ions with up to six electron pairs surrounding the central atom. 1. Do Now: Draw the Lewis structures for water, methane and ammonia. How many pairs of electrons surround the central atom in each case? 2. Exposition: VSEPR theory and structures with 4 areas of electron density 3. Mini-pleanry: Determine the shape of molecules that have 4 areas of electron density 4. Exposition: Shapes from 2 or 3 areas of electron density 5. Mini-plenary: Determine the shape of molecules that have 2, 3 or 4 areas of electron density 6. Exposition: Shapes with 5 or 6 areas of electron density 7. Exposition: How lone pairs affect bond angles 8. Independent Task: Practise determining shapes and bond angles of various different ions and molecules 7. Independent Task: Exam style questions on bond angles and molecular shape 8. Plenary: Wrapping it up

A year 7 or 8 lesson on metal alloys. PowerPoint and worksheets included (at the back of the PowerPoint). LOs: To state what is meant by an alloy. To describe the uses of some alloys. To explain why an alloy can be stronger than a pure metal. 1. Do Now: Can you remember the names of these 4 metals? Which would you use to build a bridge? Why? 2. Exposition: Video (BBC) or exposition on alloys. Ask students to define what an alloy is (could be done via Think, Pair, Share). 3. Student Activity: Worksheet answering questions on alloys video (higher and scaffolded version included) 4. Student Activity: 'Information hunt' on what various alloys contain and what their applications are 5. Exposition: Why are alloys strong? Linking strength to microscopic structure 6. Plenary: Exam style question on why alloys are strong (keywords may be provided to help) For more resources check out my shop: https://www.tes.com/teaching-resources/shop/alexpce If you liked this resource, please write a review! :)