Q.1
Students investigated a food chain in a garden. The students found 650 aphids feeding on one rose plant. Five ladybugs were feeding on the aphids. Which of the following statements about the biomass of the ladybugs is true?
  • The biomass of the ladybugs is greater than the biomass of the aphids
  • The biomass of the ladybugs is less than the biomass of the rose plant
  • The biomass of the ladybugs is more than the biomass of the rose plant
  • The biomass of the ladybugs is the same as the biomass of the aphids
Q.2
In a food chain what is meant by the word producer?
  • An animal that produces a lot of waste material
  • A plant or animal that makes energy
  • A plant
  • An insect
Q.3
In one year, the Sun supplies 4 x 10 kJ to a particular habitat, 15kJ reaches the top predator. What percentage of the Sun's energy is transferred to the predator? Try working it out rather than trying to guess.
  • 0.0375%
  • 0.00375%
  • 0.000375%
  • 0.00000375%
Q.4
During photosynthesis, which of the following is the energy transfer?
  • Light to sound
  • Light to kinetic
  • Light to chemical
  • Light to heat
Q.5
Students measured the biomass of a community living in leaf litter under the trees in the school conservation area. They found woodlice feeding on the leaves, ground beetles feeding on the woodlice and centipedes feeding on the beetles. Each student weighed the leaves in their sample and the other organisms and put their results together with the rest of the class. Which of the following could represent the class results in order of the food chain starting from the leaves?
  • 25g, 35g, 38g, 40g
  • 1kg, 550g, 38g, 750g
  • 482g, 98g, 67g, 80g
  • 800g, 45g, 3g, 0.0005g
Q.6
What is the source of energy for most food chains?
  • The Moon
  • The Sun
  • Chlorophyll
  • Chromosomes
Q.7
How much of the Sun's energy produces biomass in plants?
  • All of it
  • Most of it
  • Some of it
  • Very little of it
Q.8
For every 200kJ a gazelle gets from eating, 125kJ are excreted and 65kJ are used in respiration so how much of the original energy would be passed on to a lion that caught and ate it?
  • 5%
  • 10%
  • 15%
  • 20%
Q.9
In a food chain, what does the arrow represent?
  • The environment
  • A change in biomass
  • An increase in numbers of animals
  • The flow of energy
Q.10
Other than light, what else is required for photosynthesis?
  • Water and oxygen
  • Water and carbon dioxide
  • Water, oxygen and chlorophyll
  • Water, carbon dioxide and chlorophyll
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