Question

data analysis energy pyramid
remember that only 10% of the energy from one trophic level is transferred to the next level. scientists have analyzed the energy (in kg of biomass) in each level of the food - web shown on the right. the data is shown in the table below.

1. use a calculator to divide and find the % of energy that has been transferred from each level.

	kg biomass/m²/year	% of energy transferred	trophic level
caterpillar	17.3
robin	1.9
falcon	.18

Explanation:

Step1: Calculate energy transfer from plants to caterpillar

$\frac{17.3}{180}\times100\approx9.61\%$

Step2: Calculate energy transfer from caterpillar to robin

$\frac{1.9}{17.3}\times100\approx10.98\%$

Step3: Calculate energy transfer from robin to falcon

$\frac{0.18}{1.9}\times100\approx9.47\%$

Answer:

	kg biomass/m²/year	% of energy transferred	Trophic Level
Caterpillar	17.3	9.61%	Primary - consumers
Robin	1.9	10.98%	Secondary - consumers
Falcon	0.18	9.47%	Tertiary - consumers