CBSE Class 5 Science Different Life Styles Worksheet

I. Fill in the blanks

Question 1. Food is essential to produce energy in the body of animals.
Answer: Food
In simple words: Animals eat food to get energy for their daily activities and survival.

Exam Tip: Remember that food acts as the fuel for living organisms.

Question 2. Spiracles are special opening through which the insects breathe in the air.
Answer: Spiracles
In simple words: Insects have tiny holes on their bodies called spiracles to take in air.

Exam Tip: Insects do not have lungs; they use a network of air tubes connected to spiracles.

Answer: Haemoglobin, Plasma (or colourless fluid / haemolymph)
In simple words: Red blood cells contain haemoglobin which carries oxygen in mammals, whereas insect blood does not carry oxygen in the same way.

Exam Tip: Haemoglobin gives blood its red colour in vertebrates.

Question 4. The breathing organ in mammals, birds and human beings are lungs.
Answer: lungs
In simple words: Land animals like humans, birds, and dogs breathe air using their lungs.

Exam Tip: Lungs help in the exchange of oxygen and carbon dioxide.

Question 5. Penguins use their forelimbs as flippers to swim in water.
Answer: flippers
In simple words: Penguins cannot fly in the air, so their wings act like flippers to swim through icy water.

Exam Tip: Modified limbs help animals adapt to their specific habitats.

II. Tick the correct answer.

Question 1. Spiracles openings lead to a system of tubes called ( Bronchi / tracheae ).
(a) Bronchi
(b) Tracheae
Answer: (b) tracheae
Insects take in air through spiracles which branch into a network of tubes called tracheae.
In simple words: Insect breathing tubes are named tracheae.

Exam Tip: Do not confuse tracheae in insects with the human trachea (windpipe).

Question 2. An adult frog in water breathe through ( Moist skin / gills )
(a) Moist skin
(b) Gills
Answer: (a) Moist skin
While tadpoles breathe through gills, adult frogs in water absorb dissolved oxygen through their moist skin.
In simple words: Adult frogs breathe through their skin when underwater.

Exam Tip: Remember tadpoles use gills, but adult frogs use lungs on land and moist skin in water.

Question 3. The breathing organ in amoeba is ( body surface / spiracles )
(a) Body surface
(b) Spiracles
Answer: (a) body surface
Being a single-celled organism, amoeba breathes through simple diffusion across its cell membrane (body surface).
In simple words: Tiny single-celled animals take in oxygen directly through their outer body wall.

Exam Tip: Simple organisms do not have specialized respiratory organs.

Question 4. The covering of gills is called ( gill slits / operculum )
(a) Gill slits
(b) Operculum
Answer: (b) operculum
In bony fish, the protective flap covering the gills is called the operculum.
In simple words: The hard flap that protects fish gills is the operculum.

Question 5. The greatest migrator is ( Artic tern / monarch butterfly )
(a) Artic tern
(b) Monarch butterfly
Answer: (a) Artic tern
The Arctic tern travels the longest migration distance of any animal, flying from pole to pole each year.
In simple words: The Arctic tern holds the record for the longest migration journey.

Exam Tip: Arctic terns travel around 70,000 km annually.

III. Match the following:

Question 1. Match the items given in Column A with Column B.
1. Fore limbs modified in man - Hands
2. Lungs have tiny tubes inside them - Bronchi
3. Animals like rabbits & rats gnaw their food - Rodents
4. Paddle like limbs - Turtle
5. Blood comes to lungs through - Capillaries
Answer:
1. Fore limbs modified in man -> Hands
2. Lungs have tiny tubes inside them -> Bronchi
3. Animals like rabbits & rats gnaw their food -> Rodents
4. Paddle like limbs -> Turtle
5. Blood comes to lungs through -> Capillaries
In simple words: Correct matching pairs link biological structures with their correct descriptions or animals.

Exam Tip: Read both columns carefully before drawing matching lines.

IV. Circle the odd one out.

Question 1(a). moist skin , spiracles , scales , lungs
Answer: scales
Moist skin, spiracles, and lungs are respiratory (breathing) organs, whereas scales are body coverings.
In simple words: Scales are for protection, while the others are breathing organs.

Exam Tip: Categorize items by their function (e.g., breathing vs. covering).

Question 1(b). flippers , bronchi , fins , webbed toes
Answer: bronchi
Flippers, fins, and webbed toes are organs of movement/swimming in water, whereas bronchi are respiratory tubes.
In simple words: Bronchi are for breathing, while the others help animals swim.

Exam Tip: Look for functional odd-ones-out where three share a common purpose.

Question 1(c). proboscis , beak , tracheae , sticky tongue
Answer: tracheae
Proboscis, beak, and sticky tongue are feeding/mouth structures, whereas tracheae are breathing tubes.
In simple words: Tracheae is used for breathing, whereas the others are used for eating.

Exam Tip: Distinguish carefully between respiratory systems and feeding mechanisms.

V. Classify the following animals into the right column:

Question 1. Animals list: Goat, lion, elephant, parrot, dog, cat, deer, eagle, crow, man, frog, bear, cow.
Answer:

In simple words: Herbivores eat plants, carnivores eat flesh, and omnivores eat both plants and animals.

Exam Tip: Bears, crows, and humans eat both plant and animal matter, making them omnivores.

VI. Identify the following organs of

Question 1. Identify movement, breathing, and feeding for the illustrated animals (Fish, Toad/Frog, Butterfly, Tiger, Human, Bird/Eagle).
Answer:
1. Fish:
- Movement: Fins / swimming
- Breathing: Gills
- Feeding: Mouth (eating aquatic plants/small fish)

2. Frog / Toad:
- Movement: Leaping / swimming (webbed feet)
- Breathing: Lungs and moist skin
- Feeding: Long sticky tongue

3. Butterfly:
- Movement: Flying (wings)
- Breathing: Spiracles
- Feeding: Proboscis (nectar)

4. Tiger:
- Movement: Walking / running (limbs)
- Breathing: Lungs
- Feeding: Sharp teeth / carnivorous hunting

5. Human:
- Movement: Walking / running (legs)
- Breathing: Lungs
- Feeding: Hands and mouth (omnivorous diet)

6. Bird (Eagle):
- Movement: Flying (wings)
- Breathing: Lungs
- Feeding: Beak (carnivorous predator)

In simple words: Different animals have adapted specific body parts for moving, breathing, and eating based on their habitat.

Exam Tip: Be thorough with the specific organ systems for aquatic, aerial, and terrestrial animals.