an instrument that uses visible light and lenses to magnify viewed objects

a membrane that will only allow some substances through and not others

the net movement of water molecules from high to low concentration through a selectively-permeable membrane

a cell which is swollen with water and firm

a cell which has lost a lot of water and is soft and limp

Using a microscope to observe effects of osmosis in plant cells: practical

Combined science

Effect of osmosis and sugar concentration on the mass of plant tissue: practical

Effect of osmosis and sugar concentration on the mass of plant tissue: analysis

The importance of maintaining constant conditions in the body

Pupils will learn about factors that affect the rate of photosynthesis in plants, including temperature, light intensity and carbon dioxide concentration.

Pupils learned how substances essential for chemical reactions, and the products of the reactions, are transported into, around and out of plants, and about factors affecting the rate of water uptake by a plant.

This unit covers the importance of maintaining a constant internal environment, focusing on body temperature control, osmotic balance, and kidney function. It explains the roles of the skin, kidneys, and ADH, and emphasises data extraction, experiment techniques, and accurate data interpretation.

Coordination and control: maintaining a constant internal environment

Physical activity and equipment requiring safe use

eyepiece lens: viewing lens with ×10 magnification

objective lenses: three lenses with different magnifications

stage: specimen on a slide is placed here

light source: illuminates the specimen so that it can be observed

coarse focus wheel: for adjusting the focus in larger increments

fine focus wheel: for adjusting the focus in smaller increments

Look from the side, turn the coarse focus wheel to move the stage up.

Look into the eyepiece lens, turn the coarse focus wheel to move the stage away.

Look into the eyepiece lens, turn the fine focus wheel to make the image clear.

Put these steps in the right order to show how to use a light microscope.

water moving from a high to a low concentration

when a cells membrane pulls away from the cell wall

when a cells membrane pushes against the cell wall

water moving from a low to a high concentration

When plant cells gain water, the vacuole fills up and becomes....

{{}} is the movement of water from an area of high water concentration to an area of low water concentration through a selectively-permeable membrane.

What is the net direction of movement when the concentration of water molecules is greater inside the cell compared to outside the cell?

What is the process by which water moves into the roots of a plant?

True or false? Osmosis is a type of diffusion.

contains cell sap (water and other substances)

Which tissue inside a plant transports water?

The particles are constantly moving in random directions.

There is an overall net movement of particles from a low to high concentration.

There is an overall net movement of particles from a high to low concentration.

Which three of the following statements about diffusion are true?

A concentration {{}} is a measurement of how the concentration of something changes from one place to another.

Starter Quiz