Practical skills s2, 3rd. term quest. dec 2012
- 1. Materia: Practical skills Senior 2 Profesora: Ma. Magdalena Ravagnan Contenido nodal: Investigating biological processes TERCER TRIMESTRE Fecha de presentación: Wednesday December 12th 1) Diffusion a- Complete the following sentences with the words in the box. diffusion move about remove spaces spread out evenly can’t movement Diffusion is the _____________ of particles in a fluid from one region to another. It occurs because of two properties of fluids: the particles have ___________ between them and are able to _________ ___________. If we start off with two types of fluid which are separated, and then ___________ the barrier which is separating them then _________________ will occur. The particles from both regions will _________ _________ and move in the spaces between other particles. The particles of each fluid will continue to mix until they are ______________ distributed. Diffusion ___________ happen in solids because their particles can’t move around. b- In the boxes below, draw the arrangement of particles at each of the three stages of diffusion. 1) The two types of particle 2) The barrier is removed and the 3) The particles are evenly distributed are separated by a barrier particles have begun to mix
- 2. 2) Osmosis The diagram shows a beaker which contains a concentrated and a dilute solution separated by a partially permeable membrane. Draw a similar diagram to show the liquid levels after an hour or two. Membrane Dilute Concentrated solution solution