Kerala Syllabus Class 5 Basic Science: Chapter 01 The Chain of Life - Questions and Answers | Teaching Manual 


Questions and Answers for Class 5 Basic Science (English Medium) ഒറ്റയല്ലൊരു ജീവിയും | Text Books Solution Basic Science (English Medium) Chapter 01 The Chain of Life. ഈ യൂണിറ്റിന്റെ Teachers Manual & Teachers Handbook എന്നിവയുടെ ലിങ്ക് ഈ പേജിന്റെ അവസാന ഭാഗത്തു നൽകിയിട്ടുണ്ട്.
The Chain of Life - Textual Questions and Answers & Model Questions

ഈ ബ്ലോഗ് ഉടമയുടെ രേഖാമൂലമുള്ള അനുമതിയില്ലാതെ ഈ ബ്ലോഗിൽ നൽകിയിരിക്കുന്ന ചോദ്യോത്തരങ്ങൾ, ഇതേരീതിയിലോ പി.ഡി.എഫ് രൂപത്തിലോ, മറ്റേതെങ്കിലും ഡിജിറ്റലോ, പ്രിന്റഡ് ഉൾപ്പെടെയുള്ള ഏതെങ്കിലും രൂപങ്ങളിലേക്കോ മാറ്റി മറ്റൊരു വെബ്സൈറ്റിലോ, ബ്ലോഗിലോ, യുട്യൂബ്, സോഷ്യൽ മീഡിയാ ഗ്രൂപ്പുകളിലോ ഉൾപ്പെടെ ഒരിടത്തും പ്രചരിപ്പിക്കാൻ പാടില്ലാത്തതാകുന്നു.

1. There are many creatures around us who eat various kinds of food. What is the main food of goat?
Grass, leaves, grains

2 Which creatures feed on parts of plant?
Deer, Rabbit, grasshopper, cow, Goat, elephant

3 Write down the creatures seen in the picture.
frog, snake, worm, crab, crow, tortoise, grasshopper, crane, snail, dragonfly
i. Which of these creatures feed on plants?
• small fishes
• grasshopper
• worm

ii. Which creatures feed on small fishes?
• frog, tortoise, crane crab, crow, large fish

4. Small fishes feed on plants. Large fishes feed on small fishes. Cranes feed on fishes. Complete the illustration by adding other creatures in the field.
5. Deer, rabbit and grasshopper are plant-eating creatures.
Complete the food relationship by adding other creatures that feed on them.
● Expand the food relationship by adding more organisms
• Grass —> Deer —> Lion
• Grass —> Rabbit —> Tiger
• Grass —> Goat —> Tiger
• Grass —> Deer —> Tiger
• Grass  —> Rabbit  —> Human
• Grass —> Goat —> Human
• Grass —> Worm —> Fowl  —> Human
• Grass —> Grasshopper —> Fowl —> Human
• Grass —> Worm —> Frog —> Snake —> Eagle
• Grass —> Grasshopper —> Frog  —> Snake —> Eagle
• Grass —> Worm —> Calotes —> Snake—> Eagle
• Grass —> Grasshopper —> Fowl —> Snake —> Eagle
• Grass —> Grasshopper —> Calotes —> Snake —> Eagle
• Grass —> Worm —> Fowl —> Snake —> Eagle

6. What is food web?
Living beings depend on one another for food. This interrelationship among them is the food web.

7. What are plankton?
Plankton are small plants that flow freely in water bodies. They are the producers in the habitat system of the ocean.

8. Look at the information in the table below and draw a food web that includes these organisms.
• Plankton —> Smallfishes —> Sardine
• Plankton —> Sardine —> Shark
• Plankton —> Smallfishes —> Squid —> Shark
• Plankton —> Fishes —> Sea turtile —> Shark

9. What components does the fish need to survive?
● Sunlight
● Aquatic plants
● Water
● Oxygen 
● Microorganisms
● Worms
● Favourable Temperature

10. Categorise and list the components of the pond.

11. What is called habitat?
The natural surroundings in which an organism lives are called its habitat.
12. Observe your surroundings and find different types of habitats.
• Paddyfield
• Pond
• Sacred groves
• Streams 
• Rivers 
• Lakes
• Grasslands
• Desert
• mangrove
• polar region
• Oceans

13. What will happen if tigers disappear from this habitat?
Tigers are at the top of the food chain. So the disappearance of tiger can lead to the overpopulation of animals such as deer, fox etc

14. What is food chain?
A single sequence of food relationships from the food web is the food chain.

● Find out and write more such sequences.
• Grass —> Grasshopper —> Frog —> Snake —> Vulture
• Grass —> Squirrel —> Snake —> Vulture
• Grass —> Squirrel —> Cat —> Vulture
• Grass —> Squirrel —> Fox —> Vulture

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● Compare food chains you have written and list them in your science diary.
● From which organisms do all the food chains begin?
Plants

15.  What will happen to the habitat if an African catfish reaches into a local pond?
The African catfish is a fish found in the African continent. They grow and
multiply very quickly. If they reach the water bodies of our country, it feeds on native fish in the water bodies. The organisms that feed on the African catfish are not found in our water bodies. This will be harmful to the habitat.

16. Which are the main components that plants need to make their food?
• Carbon dioxide
• Sunlight
• Water
• Chlorophyll

17. What is photosynthesis?
Plants make food using carbon dioxide and water. For this, they use the energy from sunlight. So this activity is called photosynthesis. Chlorophyll is a pigment in the leaves that helps plants to produce food. Oxygen is also produced as a result of this activity.

18. Observe the plants in your surroundings and group them according to the similarity in the arrangements of leaves.
19. Collect different coloured leaves from your surroundings. Rub the collected leaves on a blotting paper. Write down your observation in the table.
20. What is Chlorophyll?
• Chlorophyll is the green pigment in leaves.

21. What are pigments?
• Pigments give colour to leaves, stems, flowers and fruits. 

22. Observe the biodiversity garden in your school.
Can’t you see flowers and leaves in different colours? You have seen that the reason for the green colour is chlorophyll, haven’t you? What are the pigments that cause other colours? Look at the table and find out.
23. Which gas is used for photosynthesis?
Carbon dioxide

24. Which gas is used by living organisms for respiration?
oxygen

25. Name the instrument used to magnify things that cannot be seen with the naked eye.
Microscope 
26. What is stomata?
The microscopic pores in the leaves are known as stomata. It is through these pores atmospheric air enters the plant. Oxygen produced as a result of photosynthesis is also released through these pores.

27. What are epiphytes?
The plants which depend on host plants only for habitat. Such plants are called epiphytes. 
Orchids are examples of epiphytes.

28. Can the growth of epiphytes harm the host plant? What are the peculiarities of the roots of epiphytes?
No, The small roots help the epiphytes to grow by clinging onto the tree. The thick roots absorb moisture from the atmosphere.

29. What are Semi parasites
Plants make their own food by absorbing water and minerals from the host plants are called semi-parasites.
Eg: Loranthus

30. What are total parasites?
Plants which have roots that can absorb nutrients from the host plant are called total parasites.
eg; cuscutta

Let us assess

31. 'The plants with red coloured leaves can not prepare food by themselves'. Do you agree? Why?
No, I don't agree with the statement. The red-coloured leaves contain chlorophyll. Plants with red-coloured leaves can prepare their own food through photosynthesis due to the presence of chlorophyll.

32. What will happen to this food web if the number of frogs decrease?
if the number of frogs decreases there will be an increase in the number of mosquitoes and grasshoppers, which could lead to significant damage to the ecosystem.

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