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Rate of Uptake
Rate of Uptake
Light intensity, air movement and temperature are environmental factors that affect the rate of water uptake by plants.
Through which part of the plant is water absorbed?
Name the process where the plant uses water to react with carbon dioxide to make glucose and oxygen.
The movement of water through the plant is called the transpiration stream. What do we call the process where water evaporates at the leaf surface?
Water evaporates from the leaf surface mostly through pores called stomata. We call that process transpiration. Select the term that describes the movement of the water vapour away from the plant and into the atmosphere.
Diffusion is the random movement of a substance, from where there is a lot of it (a higher concentration) to where there is not so much of it (a lower concentration).
If you spray air freshener in a corner of the room, you can soon smell it all over the room because it moves about. It diffuses into the rest of the room.
Select the correct pathway of water through a plant.
Diffusion is affected by different factors, for example temperature. Would you expect water to diffuse away from the plant faster or slower on a hot day compared to a cold day?
Diffusion is also affected by how windy it is, the wind speed. Would you expect water to diffuse away from the plant faster or slower on a windy day compared to a not so windy day?
The faster the water evaporates and diffuses away from the plant, the faster the plant needs to replace this by absorbing more water across root hair cells. Select 3 factors that may affect the rate of water uptake in the roots. Consider both the rate of diffusion and photosynthesis.
You can select multiple answers