transfer of energy Flashcards
1
Q
the units for energy in the food we eat are
A
kilojoules
2
Q
the energy available at a trophic level in a particular area is
A
kilojoules per square metre per year
( kJ / m2 / year )
3
Q
e.g. energy in foxes =
A
18kJ / m2 / year
4
Q
why are pyramids of energy drawn
A
to show the total energy available in each trophic level per square metre per year
5
Q
we draw pyramids of ….
A
energy
6
Q
only …% of the suns energy is used in photosynthesis
A
1-5%
7
Q
in the first consumer …% of energy is ‘lost’
A
90%
8
Q
in the secondary consumer …% of energy is ‘lost’
A
90%
9
Q
100kg of grass would go to …kg of rabbit
A
10kg
10
Q
10kg of rabbit would go to …kg of fox
(from the original 100kg of grass)
A
1kg
