Week 2
How do water particles move?
Embedded Files
learning intentions
learning intentions
To explain the aim of a fair test clearly and accurately.
To understand how water particles naturally spread and move in different environments, including the ways they interact within living systems.
Success Criteria:
Success Criteria:
I can identify the independent, dependent, and controlled variables and write a short experimental aim using the format "The aim of the experiment is to investigate the effect of ___________________ on the __________________."
I can explain how diffusion and osmosis function by describing the movement of substances in relation to the concentration of particles.
I can conduct a scientific investigation.
Tasks
Tasks
Knowledge & understanding
🍐 Designing an experimental aim
Diffusion Simulation - instructions in booklet
Osmosis Worksheet - hard copy. Put into your booklet
Investigation Skills
Gummy Bear Prac
Literacy & research
Check your booklet is up-to-date
Literacy & research
Solute and Solvents - which is which?
Solute and Solvents - which is which?
A solution is formed by mixing a solute and solvent. So what are solute and solvent? A solute is a substance that is dissolved in a dissolving medium called a solvent.
For example, when we make a salt solution, salt is being dissolved in a dissolving medium that is water. Here, salt is solute as it is dissolved in dissolving medium water, which is solvent.
The same applies to a sugar solution. Sugar is solute, and water is solvent. Another thing to keep in mind is that solute is in limited quantity while the solvent is in excess.
A true solution is a homogenous mixture of two or more substances in which the particle size of solute dissolved is less than 1 nm. When we mix salt into the water, what happens after some time? Does the salt start setting at the bottom of the beaker? No, that doesn’t happen because it is a true solution. So, a true solution is one in which the solute doesn’t get separated out if it is kept for an indefinite time.
Now check your understanding by answering the questions in the booklet!
Knowledge and understanding
Diffusion - Particle movement in containters
Diffusion - Particle movement in containters
Diffusion is the outcome of particles' random motion, leading to the overall movement of particles from an area of high concentration to an area of low concentration, achieving an even distribution of particles throughout the container through the prevailing flow.
OSMOSIS - movement of water into organisms
OSMOSIS - movement of water into organisms
Osmosis is the net movement of solvent molecules through a semipermeable membrane. It is similar to diffusion as the movement is downhill, meaning from higher to lower concentration. In osmosis though, the movement has to occur across a semipermeable or selectively-permeable membrane. Without this element, it cannot be called osmosis.
Osmosis is the movement of water particles through a semi-permeable membrane, which is like a selective barrier. It's as if water molecules are navigating through a special gate, moving from an area of high concentration to an area of low concentration, ensuring a balance on both sides of the membrane. This selective barrier only allows certain things to pass through, making it a bit like a security checkpoint for water molecules.
Investigation skills
Investigation skills
Prac skills: How to use a Bunsen burner safely
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