Biology B6 (2)

Using Keys And Factors Affecting Distribution 

a key is a series of questions that you can use to figure out what an unknown organism is 

Distribution of organisms is affected by abiotic and biotic factors 

abiotic 

light, temp, moisture level, soil PH 

Biotic 

Competition between species might result in a different distribution of these species than if this competition didnt exist

how to measure abiotic factors 

1. use a thermometer to measure temp in diff places

2. use an electronic device called a light sensor to measure lght intensity

3. use a soil PH meter to measure level of moisture in some soil 

4. measure soil PH using indicator liquid, water is added…