: Molecules, diffusion, and states of matter.
The (typically by authors like Maron or Peryshkin) are supplementary collections of exercises designed to reinforce the main textbook. A "reshebnik" (solution guide) for these materials generally includes the following content structure: 1. Training Tasks (Trenirovochnye Zadaniya) didakticheskie materialy fizika 7 klass reshebnik
: Speed, mass, density, gravity, elastic force, and friction. : Molecules, diffusion, and states of matter
for qualitative "why" questions (e.g., "Why do we slip on ice?"). 3. Control Tests (Kontrolnye Raboty) didakticheskie materialy fizika 7 klass reshebnik