Biodiversity Flashcards
What is meant by an “abiotic” factor?
A non-living variable that can influence where organisms can live.
Give examples of “abiotic factors” ?
Examples of abiotic factors are
- water,
- air,
- soil,
- sunlight
- minerals.
What is meant by a “biotic factor” ?
An interaction associated with living organisms.
How can we measure the abiotic factor of soil moisture?
A moisture meter
How can we measure the abiotic factor of soil pH?
A pH meter
How can we measure the abiotic factor of soil temperature?
Inserting a thermometer into the soil
How can we measure the abiotic factor of light intensity?
A light meter
What is a habitat?
An environment that is home to living organisms.
What is biodiversity?
The variety of organisms found in a particular place
What is meant by a “population”?
The number of organisms of the same species
Where does aall energy come from?
The sun
How do plants make sugar?
Photosynthesis
How do plants store food?
As starch
What is the chemical test for starch?
Turns iodine solution from brown to blue / black
What is a quadrat?
Why are quadrats thrown randomly onto a piece of grass?
to stop the results being biased by picking a certain area
Give examples of biotic factors
- competition for environmental resources
- predation - a reduction in predators can lead to an increase in prey. High numbers of prey can lead to overgrazing, which can reduce biodiversity.
- disease
- food availability
Give examples of sampling techniques.
What is a “pitfall trap”?
Which part of a plant absorbs light energy?
Chloroplasts in leaf cells
What is the photosynthesis equation
