U3 KA2: Distribution of Organisms Flashcards
1
Q
- Biotic Factors (Definition and 5 examples)
A
- interactions that an organism has with other organisms.
- competition for resources, disease, food availability, grazing and predation.
2
Q
- Abiotic Factors (Definition and 5 examples)
A
- non biological factors that an organism can tolerate.
- pH, temperature, moisture, rainfall and light intensity.
3
Q
- Measuring pH
A
- insert pH probe/meter into soil and read results from scale.
4
Q
- Measuring Temperature
A
- insert thermometer into soil or water and wait until reading has stabilised.
5
Q
- Measuring Light Intensity
A
- hold a light sensitive panel towards the light and read results from the scale.
6
Q
- Measuring Moisture
A
- insert moisture meter into soil and read from the scale.
7
Q
- Minimising Sources of Error
A
- clean probes between experiments.
- don’t shade light sensors.
- take repeats and averages of experiments.
8
Q
- How to Sample Plants and Animals
A
- pitfall traps and quadrants.
9
Q
- Quadrant Limitations
A
- only suitable for small slow moving animals and plants.
- aren’t always representative of area as a whole.
10
Q
- Pitfall Trap Limitations
A
- only suitable for small surface crawling invertebrates.
