Lesson 11
Aquatic Animals
1. Answer the following questions (নিম্নলিখিত প্রশ্নগুলির উত্তর দাও):-
(i) Which animals are called aquatic animals?
Ans:- The animals that live in water are
called aquatic animals .
(ii) Where do fishes live?
Ans:- Fishes live in water .
(iii) How do fishes breathe in water?
Ans:- Fishes breathe in water with the
help of their gills .
(iv) Name two fish that live in saline water.
Ans:- Hilsa and Pomfret live in saline
water .
(v) Which fish eats larva of mosquitoes?
Ans:- A fish called Guppy eats the larva
of mosquitoes .
(vi) How many parts does a prawn's body have and what are they ?
Ans:- The prawn's body has three parts:
the head, the thorax and the abdomen .
(vii) Where does a frog live?
Ans:- A frog lives in water and also on
land .
(viii) Which body parts help the frog to jump?
Ans:- The hind folded legs of frog help to
jump .
2. Put tick (✓) marks and cross (X) marks in the boxes
according to the information given in the text (পাঠ্যপুস্তকের তথ্য অনুযায়ী সত্য হলে (✓) এবং মিথ্যা হলে (X) লেখো):-
Ans:-
|
|
Has scales |
Lives in water |
Eats worm |
Has bones |
|
Fish |
✓ |
✓ |
✓ |
X |
|
Prawn |
X |
✓ |
✓ |
X |
|
Crab |
X |
✓ |
✓ |
X |
|
Frog |
X |
✓ |
✓ |
✓ |
3. Complete the following sentences (বাক্যগুলি সম্পূর্ণ করো):-
Ans:-
(i) Fishes
breathe in water with the help of their
gills .
(ii) Three
main parts of a prawn's body are head, thorax
and the abdomen .
(iii) The
head of a prawn has antenna and two eyes .
(iv) The
crab pinches with its pincers .
(v) The skin
of a frog is rough and moist .
4. Write the meaning of the following words (নীচের শব্দগুলির অর্থ লেখো):-
Ans:-
Pool
- ডোবা ।
Aquatic
- জলচর ।
Gill - ফুলকা ।
Saline - লবণ জল ।
Mosquito - মশা ।
5. Write the opposite of the following words (নীচের শব্দগুলির বিপরীত শব্দ লেখো):-
Ans:-
Love - Hate,
Hard - Soft,
Saline - Sweet,
Head - Leg,
Big - Small .
6. Use words from the help box and write five sentences about
fish (নীচে দেওয়া শব্দগুলির সাহায্যে মাছের ওপর পাঁচটি বাক্য লেখো):-
[ Help Box : fins, gills, scales,
tail, eyes, water, worms ]
Ans:- About fish
Fishes live
in water.
They have
two eyes and they also have fins.
Their body
is covered with scales.
The fishes
breathe in water with the help of their gills.
The fishes
has a hard tail, it's help to changes direction.
Fishes live
on worms.
7. Choose the correct alternatives (সঠিক উত্তরের ওপর দাগ দাও):-
Ans:-
(i) Fishes
breathe with their lungs / gills.
(ii) Hilsa
and pomfret live in sweet / saline water.
(iii) Prawns
are fish / insects.
(iv) A
prawn's body has three / four parts.
(v) A frog's
hind legs are always open / folded.
8. Match and write 5 sentences about prawns (নীচের বাক্সে দেওয়া শব্দগুলি মেলাও এবং সঠিক বাক্য বানাও):-
Ans:-
Prawns live
in water.
Prawns swim
very fast in water.
Prawns are
not fish.
Prawns have
no backbone.
Prawns are
insects.
9. Match and write five sentences about frogs (নীচের বাক্সে দেওয়া শব্দগুলি ঠিকমতো মিলিয়ে বাক্য বানাও):-
Ans:-
Frogs have
rough and moist skin.
Frogs live
in water and also on land.
Frogs eat
only insects.
Frogs swim
with the help of their webbed feet.
Frogs jump
with the help of their folded legs.
10. Make a list of some aquatic animals (জলচর প্রাণীর একটি তালিকা বানাও):-
Ans:-
Fish,
Prawn,
Crab,
Frog .
11. Write 5 sentences about an aquatic animal (জলচর প্রাণীর ওপর পাঁচটি বাক্য লেখো):-
Ans:- An aquatic animal
(i) The
whale is the largest aquatic animal.
(ii) Whales
are mammals.
(iii) Whales
do not have hairs on their body.
(iv) Whales
are carnivorous animals and eat small fishes, and other sea animals.
(v) Whale’s
mouth can be opened as wide as 25 feet.
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