Chapter 8: Clothes—How Things are Made Case Study Questions | Environmental Science - EVS Class 5 CBSE

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Chapter 8: Clothes—How Things are Made Case Study Questions | Environmental Science - EVS Class 5 CBSE | ByteNotes.in

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Rohan was playing in his garden when he saw a beautiful bird building a nest. It was hanging from a tree branch and looked like a small pouch. The bird was carefully picking up long pieces of grass and tucking them in and out. Rohan’s father told him that this bird is a male Baya Weaver. He also said that nature is full of artists who knew how to weave and stitch long before humans ever did.

Question 1: Which material does the male Baya Weaver use to build its nest?

The bird uses long strands of grass to build the nest.
It builds the nest in a beautiful hanging shape from tree branches.

Question 2: How does the Baya Weaver make the nest strong?

The bird weaves the strands over and under each other.
This crossing pattern makes the structure of the nest very strong.

Question 3: Is there a difference between the nests built by expert weaverbirds and young ones?

Yes, expert weaverbirds weave very fine and neat nests.
Young birds who are just learning make rather rough nests.
This shows that weaving is a skill that takes practice to master.

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In her EVS class, Anaya performed an activity using blue and yellow paper strips. She taped the blue strips at the top and then moved the yellow strips through them, going over one and under the next. Slowly, a colorful pattern appeared that looked like a mat. Her teacher explained that this is exactly how clothes are made, but instead of paper, we use very thin threads.

Question 1: What is the process of crossing threads over and under each other called?

This process is called weaving.
It combines strips or threads into a patterned fabric.

Question 2: How are the two sets of threads placed during this process?

One set of thread is placed vertically.
The other set of thread goes horizontally through the vertical ones.

Question 3: Name three natural materials other than paper that can be woven into mats or baskets.

Bamboo can be used to weave strong baskets.
Coconut fibre is used for making mats and sheets.
Palm reeds and grass are also common natural materials for weaving.

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Meera’s grandmother was showing her an old photo of Mahatma Gandhi. In the photo, he was sitting with a wooden wheel called a charkha. Grandmother explained that during the freedom struggle, Gandhi ji taught everyone to make their own cloth. He believed that if we could spin our own thread and weave our own fabric, we would become 'atmanirbhar' or self-sufficient. The cloth they made was called khadi.

Question 1: What is the process of making thread from cotton called?

The process of twisting cotton fibres to make thread is called spinning.
A charkha or a spinning wheel helps in this process.

Question 2: Why did Gandhi ji want people to use the charkha?

He wanted people to become self-sufficient or atmanirbhar.
It was a symbol of India's struggle for freedom from foreign goods.

Question 3: What is a fibre and how does it become thread?

A fibre is a very thin, hair-like strand.
These fibres are twisted together to create a stronger strand.
This twisting process makes the thread strong enough for weaving.

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During a science fair, Kabir saw a display about the 'Life Cycle of a Silk Moth'. He learned that silk doesn't come from a plant, but from a tiny insect. The display showed eggs hatching into caterpillars that ate mulberry leaves. Then, the caterpillars spun a shiny covering around themselves. Kabir was amazed to learn that the soft, shiny silk scarf his mother wears started its journey from these tiny insects.

Question 1: What is the protective covering spun by the caterpillar called?

The covering spun by the caterpillar is called a cocoon.
The silk thread is pulled out from these cocoons.

Question 2: What do silkworm caterpillars eat to grow big?

The caterpillars eat mulberry leaves to grow big.
They eat a lot of leaves before they are ready to spin cocoons.

Question 3: How is the silk thread taken out from the cocoon?

The cocoons are placed in hot water first.
Then, the silk thread is gently pulled out by hand or machine.
This thread is then spun and woven to make silk fabric.

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Case Set 5

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In the village of Patan in Gujarat, Arpit watched an artisan working on a Patola saree. The artisan told him that it takes almost a year to weave just one saree because the pattern is so complex. Arpit also learned about other traditions like Pashmina from Kashmir, which comes from a special goat. These fabrics are special because they are woven by hand on an instrument called a loom.

Question 1: What is the instrument used for traditional weaving called?

Traditional weaving is done on an instrument called a loom.
Cloth made this way is known as handloom fabric.

Question 2: Where does Pashmina wool come from?

It comes from a special goat called the Changthangi.
These goats are found high in the mountains of Ladakh.

Question 3: Why does a Patola saree take 6 months to a year to weave?

The weaving process of a Patola saree is very complex.
It requires great skill and time to create the intricate patterns.
This traditional craft is done entirely by hand.

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Chapter sections

Chapter 8: Clothes—How Things are Made | Case Study Questions

Passage

Question 1: Which material does the male Baya Weaver use to build its nest?

Question 2: How does the Baya Weaver make the nest strong?

Question 3: Is there a difference between the nests built by expert weaverbirds and young ones?

Passage

Question 1: What is the process of crossing threads over and under each other called?

Question 2: How are the two sets of threads placed during this process?

Question 3: Name three natural materials other than paper that can be woven into mats or baskets.

Passage

Question 1: What is the process of making thread from cotton called?

Question 2: Why did Gandhi ji want people to use the charkha?

Question 3: What is a fibre and how does it become thread?

Passage

Question 1: What is the protective covering spun by the caterpillar called?

Question 2: What do silkworm caterpillars eat to grow big?

Question 3: How is the silk thread taken out from the cocoon?

Passage

Question 1: What is the instrument used for traditional weaving called?

Question 2: Where does Pashmina wool come from?

Question 3: Why does a Patola saree take 6 months to a year to weave?

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