Distribution of organisms - Unit 3 Flashcards
1
Q
How can energy be lost at each level of a food chain ?
A
Heat, movement, undigested materials
2
Q
How do you minimize error for a light meter?
A
Hold far away from the body so to not cast a shadow on the meter.
3
Q
How to minimise error for moisture meter and pH meter
A
Wipe probe between each reading
4
Q
How do you minimise errors for a thermometer
A
-Thermometer should be inserted at the same depth each time
-Should be left to adjust before reading is taken
5
Q
How to minimize errors for quadrats
A
- using keys
-same rules for each quadrats
-repeat experiments
-place quadrats randomly
6
Q
How to minimize errors for pitfall traps
A
-set up lots of pitfall traps
-camoflauge opening of traps
-check traps regularly
-punch holes in the base of the traps
7
Q
What is an indicator species
A
A species that by its presence or absence indicates the level of pollution in that ecosystem
