Diffusion: Revision Notes
Diffusion is the movement of a substance from an area of high concentration to an area of lower concentration. Diffusion occurs in liquids and gases when their particles collide randomly and spread out.
GCSE Maths, English and Science revision notes and interactive quizzes to help you master your school subjects. 🤓
Subscribe for FREE to access exclusive learning content. Upgrade to our Premium Plan and get FULL ACCESS for a low price of £4.90/month! 🤓
Get started with our best topics
Simplifying Algebraic Equations
In order to understand anything in algebra, you have to have an understanding of what a term is. Terms are the building blocks of algebraic equations.
Mitosis Revision Notes and Practice Quiz
The mitosis process produces two identical diploid cells for the purpose of growth and repair after cell division.
Osmosis Quiz
The osmosis process involves the movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of low concentration.
Active Transport Revision Notes and Practice Quiz
By moving through the cell membrane, substances can enter and leave the cell. Three of the most common types of movement are diffusion, osmosis, and active transport.
Percentages: Maths
To get you introduced to percentages, we will go through 3 different types of percentage questions that come up in GCSE Maths.
Microscopy: Biology
Microscopy is an essential tool for scientific research and analysis, allowing us to observe and study objects that are too small to be seen with the naked eye. GCSE Science students must understand the principles of microscopy and the different types of microscopes and their uses.
Plant Cell Organisation
The cells of plants are arranged in a similar fashion to those of other multicellular organisms. The cells of an organism form tissues, the tissues form organs, and the organs form organ systems.
The Circulatory System: Blood and Blood Vessels
Throughout our bodies, blood travels through blood vessels. There are three different types of blood vessels you should know about: Arteries, Capillaries and Veins.
The Circulatory System: Heart
Transporting materials between cells is necessary for multicellular organisms. Like many animals, the heart plays a key role in the human circulatory system, which transports blood around the body.
The Lungs
Your cells require oxygen for respiration, so you need to get it from the air into your bloodstream. You must also expel carbon dioxide from your bloodstream. All of this occurs in your lungs. Your lungs are forced to take in and expel air when you breathe.
Cell Organisation Revision Notes and Practice Quiz
There are trillions of cells in multicellular organisms like humans. Those cells have to work together to keep the organism going, which requires organisation.
Exchanging Substances Revision Notes and Practice Quiz
You need to know about a few examples of exchange surfaces. Mammals exchange gases in their lungs and absorb nutrients in their small intestines. In plants, gas exchange occurs in the leaves. In fish, gas exchange occurs in the gills.