Notes | Class V | Science Notes | Grade V Science Notes | Unit# 1 Classification and Living Thing

 Remember and understand (Page# 24)

Q.      What is the role of microorganisms in our lives?

Ans:   Microorganism plays very important role in our lives some microorganisms are useful and some are harmful.

Q.      What is difference between virus and bacteria?

Virus	Bacteria
They are very small	They are large in size as compared to verses.
They are non – cellular organisms	They are single – called organisms
They do not grow and do not divide	They grow in size and divide to produce more bacteria
All produce diseases in man, animals or plants	Some are harmless, some useful and some disease – causing.

 

I Wonder Page# 28

Q.      Can any antibiotic be used to treat any infection?

Ans:   Yes, antibiotic can be used to treat only bacterial infections e.g. cough, cold, flue, score throat etc.

 

Remember and understand (Page# 29)

Q.      How do germs make us ill?

Ans:   When people cough and sneeze, germs from their bodies are pushed out into the air when you breathe in the same air, germs enter your body and makes you ill.

Q.      What is an infections?

Ans:   When harmful micro organisms get into your body they reproduce rapidly. As their numbers increase, more cells are damaged and more toxins produced and you soon begin to feel ill. This is called are infection.

 

Brain Teacher Page# 32

i.        Bacteria               useful

ii.       Bacteria               useful

iii.      Virus                   Harmful

iv.      Fungi                   Harmful

v  Recall Questions  Page# 35

Q.1    Why should we look after our bodies?

Ans:   We should look after our bodies to make us stay healthy and to avoid diseases and germs.

Q.2    Why should we adopt healthy habits?

Ans:   Adopting healthy habit makes us stay healthy and fit.

Q.3    How bacteria useful for us?  Prove with experiment.

Ans:   Bacteria are useful in making yoghurt. Now we will prove it through an experiment.

Experiment:

i.        Take a glass of worm milk.

ii.       Pour it in a bowl.

iii.      Add a teaspoon of yoghurt.

iv.      Cover the bowl and leave it for a day at a normal room temperature.

v.       Taste it after a day.

vi.      The milk turns into yoghurt.

Q.4    What are germs?

Ans:   All the micro organisms that cause diseases are called germs.

Q.5    Name two diseases caused by:        i. Bacteria   ii. Viruses.

i.        Bacteria:    Cholera, typhoid, TB

ii.       Viruses:      Cold, Polio, Small pox

 

Unit# 1 Classification and Living Thing

v  I Wonder (Page# 2)

1.  Why do biologists classify living things?

Ans:   Biologists classify living things to make it easier to study, analyze and research them.

v  Remember And Understand (Pg#4)

1.       What are the main classifications of the animal kingdom?

Ans:   There are two main classes of the animal kingdom:

1.   Vertebrates      

2.   Invertebrates

2.       List the main differences between Vertebrates and Invertebrates?

Vertebrates	Invertebrates
Animals with backbones are called vertebrates. They are divided into five groups. Fishes, reptiles, mammals, birds and amphibians.	Animals without a backbone are called invertebrates. They are divided into two groups. Insects and worms

v  Remember And Understand (Pg#4)

1.   What is the function of segments on the body of a worm?

Ans:    Segments help the worms in movement.

2.       What is the function of a shell?

Ans:    It protects the body of insects.

v  Remember And Understand (Pg#6)

           What is Spawn?

Ans:   Amphibian eggs are called spawn.

v  Remember and understand (Pg#7)

           Fill in the blanks.

1.   gills

2.   spawn

3.   reptiles

v  Remember and understand (Pg#9)

         Complete the table by putting a tick or a cross into each space.

Feature	Fish	Amphibian	Reptile	Bird	Mammal
Backbone	ü	ü	ü	ü	ü
Fins	ü	X	X	X	X
Scales	ü	X	ü	X	X
Lays eggs	ü	ü	ü	ü	X
Has live babies	X	X	X	X	ü
Hair	X	X	X	ü	ü
Moist	X	ü	X	X	X
Feathers	X	X	X	ü	X
Gills	ü	ü	X	X	X
lungs	X	ü	ü	ü	ü

 

Mouse, dolphin, beetle, trout, snake, earthworm, Seaweed, frog, bacteria, octopus, starfish

          State which group each of the following animals belongs to:

 

         

Vertebrates	Invertebrates
Dolphin ,trout ,frog, ,snake, mouse	Beetle, earthworm, seaweed ,bacteria, starfish, octopus

 

v Remember and understand  (Page 11)

Q1.Which parts of plants are missing in ferns?

Ans: Flower is the part of plant missing in ferns because ferns do not bear flowers. They have spores.

Exercises

Q1.     Choose the correct answer.

1.   Biologists

2.   Classification

3.   Plants and Animals

4.   Fossils

5.   Fungi

6.   Lily, grass, palm and garlic

7.   Carrot, radish, turnip, sunflower, and beet root

8.   Have beaks, have feathers, hatch from eggs.

Frog, snake, ostrich, rabbit, salmon, seahorse, toad, lizard, sparrow, tiger

Q2.     Sort these animals into given classes.

 

Fish	amphibian	reptile	bird	mammal
seahorse	toad	lizard	sparrow	tiger
salmon	frog	snake	ostrich	rabbit

 

v  Q.3         What classification group does the following belong to:

Mushroom	Non-flowering plant	Tomato	Dicotyledon
Ferns	Non-flowering plant	bean	Dicotyledon
Rose	Dicotyledon	Wheat	Monocotyledon
Mint	Dicotyledon	Ginger	Monocotyledon
Sunflower	Dicotyledon	Rice	Monocotyledon
Onions	Monocotyledon	Peas	Dicotyledon

Recall Questions

Q1.    What are the main groups of animals?

Ans:   These are two main groups of animals:

1.           Vertebrates

2.           Invertebrates

 Vertebrates: Vertebrates are the animals with backbones e.g. birds, mammals.

Invertebrates: Invertebrates are the animals without backbones e.g. insects, worms

Q.2    What are main features of vertebrates and invertebrates?

Vertebrates	Invertebrates
Animals with backbones are called vertebrates. It has an internal skeleton. Vertebrates have compound eyes.	Animals without a backbone are called invertebrates. It has not an internal skeleton. Invertebrates do not have compound eyes.

Q.3    List down the difference between monocotyledons and dicotyledons with the help of diagram?

Monocotyledons	Dicotyledons
Monocot plants contain one seed leaf. It does not bear flowers. For example: wheat, maize , rice etc.	Dicot plants contain two seed leaves. It bear flowers. For example: Peas, beans, mint etc.

 

v  Diagram reference Page# 14, 15

Higher Order Thinking Questions (HOT`s)

1.       How would you classify Human Beings?

Ans:   Human beings are placed in the class of mammals because:

1.   They have hair on body.

2.   They breathe through their lungs.

3.   Female mammals give birth to their babies and feed them on milk.

2.       Discuss your understanding of why the classification of living things is important?

Ans:   Classification of living things is important because:

1.   It is easy to study them.

2.   It is easy to determine the similarities and differences between them.

Q.3    What would be the impact of loss of biodiversity in a river?

Ans:   Biodiversity improves water quality and helps ecosystems to withstand pressures from pollution. Without it animals and plants cannot survive in the rivers for a long time because some animals make their food through plants in the river water.