Sampling Techniques

What is a quadrat?

• A type of vehicle

• A tool to sample strength

• A tool to sample quantity

• A type of clothing

Why do scientists use sampling techniques to gather population data rather than counting everything?

• scientists are lazy

• sampling is more efficient and achievable

• sampling is more accurate

• scientists prefer estimations

• sampling is cheaper

Tags

NGSS.HS-LS2-2

NGSS.HS-LS3-3

What is a square called that we use to sample populations?

• grid

• quadrat

• cube

• tricep

• quarter

What type of population would you measure using a quadrat?

• 
• 
• 
• 

Tags

NGSS.MS-LS2-1

What is a downfall to using population estimation methods?

• There is always at least some error involved

• It is always a slow process

• Estimations don't give us usable information

• They are harmful to the environment

Limpets were found in 25 out of 50 quadrats. What percentage of quadrats contained limpets?

• 100%

• 25%

• 50%

• 75%

Tags

NGSS.MS-LS2-1

Ten 1m² quadrats were placed in a 40m² field. On average 2 snails were found in every quadrat. Estimate the population size of the whole field.

• 2

• 10

• 40

• 80

• 20

These four 1m² squared quadrats were place in a 8m² garden. Estimate the total population of flowers in the whole garden.

• 16

• 17

• 8

• 40

• 20

Tags

NGSS.MS-LS2-1

These four 1m² squared quadrats were place in a 9m² garden. Estimate the total population of flowers in the whole garden.

• 18

• 17

• 9

• 21

• 12

Can a quadrat be used on a large land organism that moves around in a herd?

• yes - use a quadrat

• no - you can't use a quadrat