Fieldwork Based Questions

What is the correct sequence of measuring the height of a tree?

(1) Stand at a position on the same ground level to the tree.

(2) Then add the vertical distance between the ground level and observer's eye level.

(3) Use an Abney level to find the angle of elevation to the top of tree

(4) Calculate the tree height with the tangent formul

(5) Use a measuring tape to measure the horizontal distance between the observer and the tree.

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• 5 - 2 - 3 - 4 - 1

• 1 - 5 - 3 - 4 - 2

• 2 - 4 - 5 - 1 - 3

What is the correct sequence of estimating the undergrowth cover by Quadart Method?

(1) Work out the percentage of quadrat with undergrowth cover

(2) Count the small grids with the undergrowth cover

(3) Estimate the growth by calculating the proportion of squares having undergrowth

(4) Place the quadrat along the transect or in your collection point.

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• 4 - 1 - 2 - 3

Which of the following is not a disadvantage of conducting fieldwork during the summer season?

• The fieldwork is likely to be disrupted by extreme weather conditions such as rainstorms, thunderstorms and typhoons

• Storm surges may occur when a typhoon is approaching. This poses danger to data collectors

• The fieldwork is less likely to be disrupted by extreme weather conditions such as typhoons or rainstorms in autumn/winter

• Data collectors could be injured by lightning strike during thunderstorms

   Systematic sampling is selecting samples from a population at (a)   ?

Match the following fieldwork tools

• Light Meter/Lux Meter

• 
• Ranging Rods

• 
• Clinometer

• 
• Abney Level

• 
• Distance measuring wheel

• 

Before using an instrument for measurements, which of the following can reduce the errors of the data collected?

(1) Reading the user manual of the instruments

(2) Checking and trying out the instrument

(3) Not calibrating the instrument

• (1) and (2)

• (1) and (3)

• (2) and (3)

• (1), (2) and (3)

A scatter diagram uses points to show the distribution pattern of ​ variables. The X-axis represents the ​​ (a)   variable, and the Y-axis represents the ​​ ​ (b)   variable.​​

• Independent
• dependent
• data
• population
• relationship
• best-fit

Which of the following descriptions about the Spearman's rank correlation coefficient are correct?

(1) A value close to -1 means that there is a strong negative correlation between the two variables.

(2) It can show whether a causal relationship between the variables exists in reality

(3) It is applicable to a data set with 10 pairs of data points or above

• (1) and (2)

• (1) and (3)

• (2) and (3)

• All of the above

Answer explanation

Spearman's rank correlation coefficient only give a very rough estimation on the relationship between two variables, not exactly in reality.

A group of Geography students carried out a fieldwork on noise pollution in a new town. For each land use type, three sites randomly selected for measuring the noise level by instruments. Which sampling methods was used by the students?

• Random sampling

• Systematic sampling

• Stratified sampling

• Quota sampling

Answer explanation

Because the students firstly sub-divide the data collection sites by their landuse and then within the same landuse area, randomly select three sites for measurement. So the answer should be Stratified Sampling......

What is the correct sequence of method in calculating the tree density of an area?

(1) Define the study area (2) The longer the average nearest neighbour distance, the lower the tree density, and vice versa. (3) To avoid repeating measuring, tie a ribbon on each measured tree. (4) Calculate the mean nearest neighbour distance to evaluate the tree density. (5) For each tree, measure the distance between the tree and the nearest neighbour.

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• 1 - 2 - 3 - 4 - 5

• 2 - 3 - 4 - 5 - 1

• 4 - 5 - 1 - 2 - 3