Sustainability and Plant Minerals Flashcards
Define the term ‘sustainability’.
The ability or capacity of something to be maintained or to sustain itself.
Define the term ‘renewable resource’.
Resources that can be used indefinitely without running out. (infinite)
Define the term ‘non-renewable resource’.
Resources that will eventually run out. (finite)
Give an example of a sustainable practice.
Replacing trees after logging.
Give an example of a unsustainable practice.
The use of fossil fuels to make polythene and fuel.
How can plant fibres be used?
To make rope, fabrics and/or hemp instead of oil
What are the positives of using plant fibres and starch over fossil fuels?
- More sustainable practice as crops can be regrown
- Materials made from plants are biodegradable
- Plants are easier to grow and process which means materials will be cheaper and easy to use in developing countries.
- Less fossil fuels are used which is better for the environment too
How can starch be used?
To make biofuel and bioplastics
How are water and mineral ions transported through the plant?
They are absorbed through the roots and travel through the plant in the xylem.
Why do plants need water?
- photosynthesis
- transportation of minerals
- maintaining structural rigidity - regulation of plant temperature
Why do plants need magnesium ion?
For the production of chlorophyll
Why do plants need nitrate ions?
For the production of DNA, proteins, enzymes and chlorophyll
Why do plants need calcium ions?
They are an important component of cell walls and for plant growth.
How does water maintain plants’ structural rigidity?
It exerts turgor pressure in the cell vacuole.
