Tag Archive | Osmosis
Higher Osmosis
Osmosis involves the movement of substances from an area of high water concentration to an area of low water concentration through a selectively permeable membrane. This is the movement of molecules down a concentration gradient. Three words are often used to describe the internal conditions of a cell or the surrounding solutions. These are hypertonic, isotonic and hypotonic. Hypertonic […]
National 4/5 Update
This week in class we have been learning about how osmosis and reverse osmosis can be used in a number of useful ways. Examples of these include water purification and energy generation. You all did a fabulous job of producing leaflets which outlined the main points. We also learned a little about active transport and […]
National 4/5 Biology
Welcome back after the holidays! So far this term we have been learning about osmosis and reverse osmosis. Osmosis involves the movement of substances from an area of high water concentration to an area of low water concentration through a selectively permeable membrane. This is the movement of molecules down a concentration gradient. Both osmosis […]
National 4/5 – Osmosis
Having moved on from diffusion, this week we carried out our first major investigation for our folios. We investigated the factors which might affect the water content of potato tissue. Generally, you all did a good job of completing the practical work and now the race is on to complete your write-up before the end […]
National 4/5 – Diffusion
Diffusion is the movement of a substance from a region of high concentration to an area of low concentration. This is also known as substances moving down a concentration gradient. It is a passive form of transport which does not require energy. This is important so that plants get the raw material they need for […]
Cell Transport Summary
This video summarises all the different forms of cell transport. It is very detailed so you will not need to remember all of it but it is helpful. We will learn about endocytosis and exocytosis next week.
Mrs Matheson's Blog 