Food Web Made Easy: Powerful Primary 6 Science Guide to Master Predator and Prey Relationships

Understanding a food web is an important part of Primary Science because it helps students explain how organisms in an ecosystem depend on one another for survival. Many PSLE Science questions test whether students can identify the relationship between a predator and its prey, and predict what happens when there is a change in the ecosystem.

A common challenge students face is memorising the arrows in a food web without understanding the relationships between organisms. To answer such questions confidently, students should always study the connections carefully and ask:

What organism eats this organism?
Is this organism a predator or prey?
If the population of one organism increases or decreases, what will happen to the other organisms?

For example, consider this question on a marine food web:

Master Primary Science Food Web questions with clear explanations on predator, prey, food chain relationships and PSLE answering techniques. Get instant homework help.

A new predator of the lobster was introduced to this community. Which organism(s) in the food web will increase in number?
(1) Zooplankton
(2) Green algae
(3) Mussle
(4) Limpet

When a new predator of the lobster is introduced, the first step is to determine how the lobster population will change. A decrease in one organism can create a chain reaction that affects other organisms connected through the food chain and food web. By understanding these relationships instead of memorising answers, students can become more confident learners and tackle unfamiliar Primary Science questions during PSLE.

This question was previously submitted by a student who received guidance through Superstar Teacher’s instant homework help. The mentor-student conversation below shows how students can break down complex food web questions step by step and develop stronger answering techniques through on-demand homework help.

Real mentors, Real-time answers

Jeannie

hello :)
hi
ok for this question, if a predator is introduced into the ecosystem and eats the lobster, the prey that the lobster currently feeds on will increase in number
because there are lesser lobsters to eat them
so it is the limpet and mussels
zooplankton doesnt increase because it still gets eaten by the mussells
ok
can i ask a que
yes of course!
what is harnivo and carnivo and obnivo means
carnivore eats meat only, herbivore eats plants only, and omnivore eats both :)
is there others
no, largely is like that
ok
thank u
that u allow me to ask other que
oh no worries :)
because other mentor does not
ok bye
ok bye bye! :)

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