Animals Adaptation and Life Cycles (Class 4)

What this worksheet covers

This is a fifteen-question practice worksheet on animals — adaptation and life cycles for Class 4, written to the pattern of the SOF National Science Olympiad (NSO). It carries 21 marks and is designed to be attempted in 40 minutes, split across three sections — Scientific Reasoning, Applying What You Know and Achievers Section. Every question is multiple choice with exactly one correct option, and every one comes with a fully worked solution rather than just an answer key — so a child who gets one wrong can see where the reasoning went astray instead of only learning that it did.

Skills your child practises

• Applied problem-solving on animals — adaptation and life cycles at Class 4 level
• Working accurately against a time limit, as the real paper demands
• Scientific Reasoning questions in the olympiad format
• Applying What You Know questions in the olympiad format
• Achievers Section questions in the olympiad format
• Reading worked solutions to find the step that went wrong

How to use it

1. 1There are 15 questions in this worksheet. All questions are compulsory.
2. 2Each question has four options (A), (B), (C) and (D). Exactly one option is correct.
3. 3Questions 1–12 carry 1 mark each. Questions 13–15 (Achievers Section) carry 3 marks each.
4. 4There is no negative marking. Study every diagram and table carefully.

Sample questions from this worksheet

A preview of what's inside Animals Adaptation and Life Cycles (Class 4) — the PDF has the full set, and every question comes with a worked solution like these.

1. 1. The complete change of form from a caterpillar into a butterfly is called _______.

   • AMetamorphosiscorrect
   • BMigration
   • CHibernation
   • DCamouflage
   Solution: Metamorphosis is a complete change of body form during the life cycle. It happens in butterflies, frogs and mosquitoes.

2. 2. A chameleon changes its colour to match the leaves around it. The main advantage of this is that it can _______.

   • AMove much faster
   • BBreathe more easily
   • CKeep its body warm
   • DHide from enemies and surprise its preycorrect
   Solution: This is camouflage, and it works both ways — the chameleon becomes hard for predators to spot, and insects do not notice it until it is close enough to catch them. So it can hide from enemies and surprise its prey.

3. 3. Consider the following statements.(i) All animals that live in water breathe through gills.(ii) A tadpole has a tail but an adult frog does not.(iii) Migration is a long seasonal journey to find better weather and food.Which of the statements is/are correct?

   • A(i) and (ii) only
   • B(ii) and (iii) onlycorrect
   • C(i) and (iii) only
   • DAll three
   Solution: Statement (i) is false — whales, dolphins and turtles live in water but breathe air with lungs. Statement (ii) is true; the tail is absorbed during metamorphosis. Statement (iii) is true; the Siberian crane, for example, flies to India every winter. Hence (ii) and (iii).