| densiometer |
The class took 100 canopy
cover readings. 60 were classified as positive (+). What is the
percent canopy cover at this site? What fraction of the site has
a green canopy cover?
NCTM Standard: numbers & operations 3.1 through 3.6
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The class took 50 canopy
cover readings. 35 were classified as positive (+). What is the
percent canopy cover at this site? What fraction of the site has
a green canopy cover?
NCTM Standard: numbers & operations 3.1 through 3.3
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The class took 55 canopy
cover readings. 35 were classified as positive (+). What is the
percent canopy cover at this site? What fraction of the site has
a green canopy cover?
NCTM Standard: numbers & operations 3.1 through 3.3
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|
clinometer
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Four groups measured
the distance from the tree to the spot where they used the clinometer.
Group 1 recorded the distance as 155 cm. Group 2 recorded the distance
as 150 meters. Group 3 recorded the distance as 148 mm. Group 4
recorded the distance as 138 m. Which group used the correct units?
How can you tell?
NCTM Standard: measurement 1.1 through 1.3
Which of the measurements are greater than a meter in length?
NCTM Standard: measurement 1.2 through 1.3
Arrange the measurements (above) from smallest to largest.
NCTM Standard: measurement 1.2 through 1.3.
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When you use the clinometer,
the string makes various angles as you point it toward the top of
trees. Draw the approximate shape (do not use a protractor or the
clinometer) of an angle of:
30 degrees
45 degrees
60 degrees
90 degrees
NCTM Standard: geometry 1.1
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Chris has an eye height
of 1.65 meters. When Chris stands 62 meters away from the tree,
the clinometer records an angle of 24 degrees. What is the height
of the tree?
NCTM Standard: geometry 1.4
(tree height = (TAN – BVW) x (distance to object) + eye height
What is the first calculation that you do? multiply or add?
NCTM Standard: algebra 2.3
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