Populations and Sampling Techniques

Which factor is NOT typically considered when selecting a quadrat size?

• The type of organisms being studied

• The size of the study area

• The time of day

• The density of the population

What is the main advantage of using random sampling in ecological studies?

• It ensures a larger sample size

• It reduces sampling bias

• It is easier to perform

• It provides more detailed data

What does "abundance" describe in an ecosystem?

• The area where a species is found

• The number of different species

• How many members of the species live throughout the ecosystem

• The types of food available

What is the purpose of using a line transect in ecological studies?

• To measure the height of plants

• To estimate the population density of animals

• To study the distribution of species along a gradient

• To capture and mark organisms

What is the name for the smaller group?

• Population

• Percent

• Sample

• Mode

Why do scientists use sampling techniques to gather population data?

• their lazy

• it is not possible to count an entire population

• it is possible to count an entire population

• they like to make estimations

Two or more members of a particular species living and interacting in the same area

• Community

• Population

• Organisms

• Biosphere

Tags

NGSS.MS-LS2-4

Which is bigger? (más grande?)

• Sample

• Population

If 50 crabs were captured and marked and then released and then a few days later 25 were caught and of those 5 were marked. What would the estimate of the population be?

• 500

• 250

• 75

• 200

If I wanted to know how many blades of grass are inside the track, which sampling method could I use?

• count every blade of grass

• Mark a random number of blades of grass, return two days later and recapture the blades

• Divide the grassy area into 1 inch sections, randomly pick several sections to count, average them together and multiply that by the total square inches.

Tags

NGSS.MS-LS2-1