Matrix 2: Studying Popluations
BI1.2 Estimating a Population
In this activity, you will estimate the population of toothpicks.
Materials: toothpicks (see teacher)
Time: 15 minutes
Procedure: Scatter toothpicks over a rectangular area (end of hall works well). Measure the total area covered by toothpicks. Estimate the population of toothpicks.
Think It Over
Which techniques did you use to estimate the population?
Do you think this is the best way to determine the population of toothpicks? Explain why.
Videos and Podcasts
Sampling Size (7:59)
To be able to draw accurate conclusions concerning the behaviors or characteristics of a population, a sample of that particular population must be randomly selected. But how many subjects should be in the sample. The larger the sample the more likely we are to get accurate information about the composition of a population.
Choosing Samples (10:58)
Sampling is a way to get information about a population without studying the entire population.
Behind the Numbers (20:11)
Links population fluctuations to changes in various abiotic and biotic factors
Follow the path of energy as it is transferred via the food chain from one type of organism to another.
Real Life Application: Isle Royale
Isle Royale Wolves and Moose
Isle Royale Photo Gallery
Wolf/Moose Population Graph
Watching Wolves on a Wild Ride
Know-How: Lynx Hare Population
Lynx Hare Population