Chemistry (Gr7)
Skills:
- Density, mass and volume. How are they calculated? (5:16)
- Atoms and chemical elements? (13:08)
- Representing substances using chemical formulas and models (11:02)
- Ball-and-stick models for chemical formulas (9:06)
- The atomic composition of molecules (5:16)
- Classification of elementary substances and compounds using chemical formulas (7:26)
- Reactants and products (9:12)
- How to count atoms and molecules in chemical reactions (4:01)
- Calculate amounts of reactants or products in chemical reactions (8:13)
- Energy changes in chemical reactions (4:16)
- Physical versus chemical changes (2:42)