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Samcheer Kalvi 6th Science Books English Medium Plants in Daily Life

Science : Term 3 Unit 1 : Plants in Daily Life

I. Choose the correct answer:

1. One of the following birds is an example of plant pollinator

  1. Duck
  2. Parrot
  3. Humming bird
  4. Dove

Ans : Humming bird

2. Natural Mosquito repellant is 

  1. Nutmag
  2. Bamboo
  3. Ginger
  4. Neem

Ans :  Neem

3. Which of the following is not a root ?

  1. Potato
  2. Carrot
  3. Radish
  4. Turnip

Ans : Potato

4. Which of the following is not a root ?

  1. Amla
  2. Tulasi
  3. Turmeric
  4. Aloe

Ans : Aloe

5. Which is the national tree of India?

  1. Neem tree
  2. Jack tree
  3. Banyan tree
  4. Mango tree

Ans : Banyan tree

II. Fill in the Blanks 

1. Every year, October __________ is celebrated as world food day 

Ans : 16

2. ________ is an example of textile fibre.

Ans : cotton

3.  I am the state tree of Tamilnadu . Who am ______ I ?

Ans : palm tree

4. The juice of the leaves of __________ plant relieves cough and bronchitis.

Ans : Tulasi

5. The edible seeds of leguminous plants are called __________

Ans : pulses

III. True or False. If False, give the correct statement

1. Plants grown for decorative purposes are called as softwood.

Ans : False

Cu. An. : Plants grown for decorative purposes are called as ornamental plants.

2. Silkworm eats mulberry leaves.

Ans : True

3. Caulifl ower is used for ornamental purpose.

Ans : False

Cu. An. : Caulifl ower is used for vegetable purpose.

4. Cotton cloth is not suitable for summer season.

Ans : False

Cu. An. : Cotton cloth is suitable for summer season.

5. Sugarcane is used as bio fuel.

Ans : False

Cu. An. : Jatropha is used as bio fuel.

IV. Match the Following

1. Fibre yielding plantChloramine
2. HardwoodSpice
3. NeemHemp
4. CloveCereals
5. MilletSpice

Ans : 1 – C, 2 – E, 3 – A, 4 – B, 5 – D

V. Analogy

1. mango : fruit :: maize : _______ 

Ans : cereal

2. coconut : fibre :: rose : ______ 

Ans : flower

3. bees : pollinate insect :: earthworms : ______ 

Ans : produce manure

VI. Give very short answer 

1. What is food?

Food is any substance consumed to provide nutritional support for an organism. It is usually of plant or animal orgin, and contains essential nutrients, such as carbohyrates, fats, proteins,vitamines or minerals.

2. What are medicinal plants?

Some chemcial compounds in the some plants act against insects, fungi and certain germs. They are called medicinal plants

3. How hard wood differ from soft wood?

Hardwood:

  • Hardwoods are angiosperms (flowering plants), the largest group of land plants.
  • High-quality furniture, decks, flooring, and wooden construction are being made only using hardwood.
  • eg. Teak, Jackfruit.

Softwood:

  • Softwoods come from gymnosperm (nonflowering plants) trees.
  • Certain angiosperms also yield softwood Softwoods have a wide range of applications such as making plywood, wooden boxes, medium-density Fibreboard (MDF) and paper making.
  • eg: katampu, Pine.

4. What is a spice?

Spices are the aromatic parts of tropical plants traditionally used to flavour food.

5. Name any three medicinal plants, which are available in your area?

  • Neem
  • Aloe
  • Tulasi

6. What are the uses of timber?

The wood needed for the construction of buildings and making of furniture are obtained from certain plants.

VIII. Give short answer

1. What is a symbiotic relationship?

Obligate symbiosis is when two organisms are in a symbiotic relationship because they can’t survive without each other. Facultive symbiosis is when the species live together by choice. There are four main types of symbiotic relationship: mutualism, commensalism, parasitism and competition.

2.  Write the uses of neem?

  • Farmers in India used urea as a fertilizer to increase the agricultural productivity.
  • Indian Scientists made Neem Coated urea which released nitrogen gradualy and helps the plants to absorb maximum nitrogen.
  • It reduces the impact of urea on an environment.

3. Name any five plants and their parts that we eat.

Roots :

  • Beetroot
  • Carrot.

Leaves:

  • Curry Leaves
  • Cabbage.

Stems:

  • Potato
  • Yam.

Flowers:

  • Banana flower
  • Caulifl ower.

Fruits:

  • Amla
  • Guava.

IX. Answer in detail

1. Write short notes on – Timber yielding plants.

The wood needed for the construction of buildings and making of furniture are obtained from certain plants. We use wood for these purposes due to their features like durability, stylish finishing and resistance to temperature changes.

All commercial timbers are classified into two classes as Hardwoods and softwoods based essentially on their structure.

Hardwoods:

  • Hardwoods are angiosperms (flowering plants), the largest group of land plants.
  • High-quality furniture, decks, flooring, and wooden construction are being made only using hardwood.
  • eg. Teak, Jackfruit.

Softwoods:

  • Softwoods come from gymnosperm (non-flowering plants) trees. Certain angiosperms also yield softwood
  • Softwoods have a wide range of applications such as making plywood, wooden boxes, medium-density Fibreboard (MDF) and paper making.
  • eg: katampu,
    Pine.

2. Comment on importance of plant animal interaction.

Animal-plant Interactions

Animals rely on plants for their food and shelter. This relationship benefits not only animals but a lso plants. Such relationship is economically significant.

For example, silkworms feed on mulberry leaves and live of mulberry plants. This relationship between a worm and a plant is economically useful for us in silk production.

Animals, pests, and birds are essential for cross-pollination of plants.

Bright colours of flowers, smell and honey attract insects. As the insects go from one flower to another, they leave the pollen grains from their body. This results in cross-pollination and the formation of vegetables and fruits.

These insect pollinators and birds need to be protected to produce the best yield.

Bees are the best pollinators. They also give us honey.

Plants and algae living in coral reefs are the food for variety of fishes. Fisheries work is done in these areas.

Animals and birds play an important role in spreading seeds of various plants. The digestive enzymes in the digestive system of the birds soften the protective layer of the seeds and make it easier to germinate.

If these natural relationship between animals and plants are affected, it shows its impact on economy too.

How do we reduce noise pollution?

  • Turn off your electronics when you do not use them.
  • Lower the volume when you watch TV or listen to music.
  • Remind drivers not to use the horn too much.
  • Avoid fireworks.
  • Speak, do not shout (try to set an example).

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