Primary 3 · Science · Cycles: Life Cycles
Cycles: Life Cycles questions for Primary 3 Science
9 questions to work through online, 2 of them written out the way the paper asks. Answer and you get the working straight away, then a score at the end. No sign-up, and you can retake it as often as you like.
- Reading a life cycle
- Counting stages
- Young that resemble the adult
- Comparing two cycles
- Frog life cycle
- Why life cycles matter
- Why the cycle repeats
- Naming a stage
Same picture as the question above.
| Animal | Number of stages | Young resembles adult? |
|---|---|---|
| X | 4 | ✗ |
| Y | 3 | ✓ |
Same picture as the question above.
Answers and explanations for all 9 questions
Every answer with the reasoning behind it. Worth reading after you have tried the set — or on its own, if you are a parent marking it.
According to the diagram above, which stage comes straight after the larva?
Answer: pupa
In a butterfly's life cycle the order is egg, larva, pupa, adult — so the pupa follows the larva.
How many stages are there in the life cycle shown in the diagram above?
Answer: 4
The diagram shows 4 stages: egg, larva, pupa and adult.
In which animal's life cycle does the young look most like a small version of the adult?
Answer: a grasshopper
A young grasshopper is a nymph, which looks like a small adult without wings. The others all change shape completely.
Based on the table above, which statements are correct?
Answer: A, B and C only
X has 4 stages against Y's 3, and Y's young resembles the adult. The extra stage in a four-stage cycle is the pupa. Both start as eggs.
Which stage of a frog's life cycle happens in water and has no legs?
Answer: tadpole
A tadpole hatches in water, swims with a tail and has no legs at all. Legs grow later.
A farmer wants to stop caterpillars eating her vegetables. Which of these would help, based on the butterfly's life cycle?
Answer: A, B and C
Every one of these breaks the cycle at some point: netting stops eggs being laid, removing eggs stops caterpillars hatching, and picking caterpillars off deals with the ones that got through.
Why is the diagram above drawn as a ring rather than a straight line?
Answer: because the adult lays eggs and the whole cycle begins again
The adult lays eggs, and those eggs start the same four stages over again — which is what makes it a cycle rather than a line.
In the diagram above, the stage between the larva and the adult is when the insect is inside a hard case and does not feed. What is this stage called?
Answer: pupa
The resting stage inside a hard case is the pupa.
A cockroach's life cycle goes egg, nymph, adult. How many stages does it have? (Answer with a number.)
Answer: 3
Egg, nymph and adult make 3 stages.