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?

In a food chain what is meant by the word producer?

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.

During photosynthesis, which of the following is the energy transfer?

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?

What is the source of energy for most food chains?

How much of the Sun's energy produces biomass in plants?

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?

In a food chain, what does the arrow represent?

Other than light, what else is required for photosynthesis?