CBSE > Class 06 > Science (OLD) | CBSE Board | Homework Help

Fix a lighted candle on a table. Take a rubber tube, stretch it straight and look through it at the flame of the candle with one eye (keeping the other eye closed) [see Figure (a)]. We will find that when the rubber tube is straight, we can see the light of candle flame through it.

Now, bend the rubber tube a little and look through it at the candle flame again [see Figure (b)]. We cannot see the light of candle flame through a bent rubber tube. This means that the light of candle flame can travel through the hole of straight rubber tube but not through the bent rubber tube. From this observation we conclude that light travels in a straight line.

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What are cartilage?

Posted by Nency Nathani 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 1 month ago

Cartilage is a stiff yet flexible connective tissue. It is not as hard and rigid as bone but is stiffer and less flexible than a muscle. Cartilage is and elastic tissue that covers the end of the bones at a joint.
Cartilage acts as a cushion or sponge and absorbs shock at the joints.
It is present at joints between bones, the rib cage, the ear, the nose, the elbow, the knee, the ankle, the bronchial tubes and the intervertebral discs.

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Why does a bump of cotton wool shrink in water

Posted by Priya Pradeep 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 1 month ago

A lump of cotton has air trapped in it, in the spaces between the cotton wool. When water is poured on it or a lump of cotton is dipped in water, the air so trapped gets displaced appears in the form of bubbles.The result is that no air space is left between the cotton wool. In this way, the size of the lump decreases so that it shrinks.

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Define transpiration

Posted by Hema Malini 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Hema Malini 7 years, 1 month ago

Plant use water to prepare their food the excess water is released from leaves as is called transpiration

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What is transmission

Posted by Tanishka Ramesh 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Anjali Sha 7 years, 1 month ago

Sending a television or radio program from one place to anothe

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What is mean by carnivores

Posted by Sukumar K.S. 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

3 answers

Aashish Ranjan 7 years, 1 month ago

Animal who eat meat and other animal are known as carnivores. Ex-Tiger, lion, vulture, etc.

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Tanya Gupta 7 years, 1 month ago

Animals who eat only flesh of other animals are called as carnivores. Example - Tiger,lion,etc.

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Yogita Ingle 7 years, 1 month ago

Carnivores are animals which eat flesh of other animals. eg tiger.lion etc. Carnivores are predators. They are at the very apex of the food chain. They hunt for food and are called as prey. Most carnivores get their food and nutrients indirectly through herbivores that feed on plants.

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What is habetad

Posted by Harshil Maru 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Pratik Bhamare 7 years, 1 month ago

The scrounging where plants and animals live is their called habitat

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what type of motion is in electric fan wgile motion?

Posted by Gyandeep Gourav 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 1 month ago

Fan is moving in fixed at some position. here the fan undergoes circular motion. In the circular motion, the objects follow a circular path of motion without changing their position. It is the circular movement of fan that results in cool air.

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Write two points of diffrence between floods and droughts

Posted by Tanya Gupta 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

2 answers

Tanya Gupta 7 years ago

Thanks Yogita

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Yogita Ingle 7 years, 1 month ago

Drought - The abnormally long period of insufficient or no rainfall at all is called drought. There is very little or non water available during a drought. Most plants die leading to lack of food in the region. The lack of food in a region for a long period is called famine.
Floods - A condition when ground becomes submerged under water, due to heavy rain and overflowing of rivers is called a flood.

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Why are Burrows and holes dug deep into by the animals which live inside the soil

Posted by Radhika Pandey 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Meghna Thapar 6 years ago

The desert animals like rats and snakes dig deep burrows where they live during the hot day time. These burrows stay cool and protect them from sun’s heat as well as loss of water from their body. They come out during cool night in search of food.

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What is predator

Posted by Rimi Mehta 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 1 month ago

Predator
(i) Predator involves the killing and feeding of an organism by another organism.
(ii)Predators can be both carnivorous as well as omnivorous.
(iii)Predator completely depends on the prey for food.
(iv)Predator is stronger.

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What are luminous object?????!!!

Posted by Dheetchidh P 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

4 answers

Aashish Ranjan 7 years, 1 month ago

Objects which emite light of their own are called luminous objects. Ex- sun,moon ,etc

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Tikelal Bag 7 years, 1 month ago

Which have its own light s called luminous object

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Tanya Gupta 7 years, 1 month ago

Luminous object : Object which gives light of their own are called luminous object Example : Sun, Lamp, Candle, Fire, Flashlight, Bulb, Firefly (an insect), etc.

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Yogita Ingle 7 years, 1 month ago

Luminous : Object which emit light of their own. Eg: Sun, Bulb, Candle, Fire

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What are the method used for rain water harvesting?

Posted by Vasu Gumber 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 1 month ago

Rainwater harvesting is a technique of collecting and storing rainwater for domestic useRainwater harvesting is a technique of collecting and storing rainwater for domestic use.
Three methods of rainwater harvesting followed in different regions of India for:

Bamboo dripping irrigation system in Meghalaya
Storing rainwater in underground 'tankas' in Rajasthan.
Kuls or guls are the water diversion channels built mainly in the Himalayan region for agricultural purposes

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How is silk obtained Answer in long and in points

Posted by Tuhin Bhattacharjee 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 1 month ago

In order to obtain silk, mulberry trees are cultivated, silkworms are reared and their cocoons are collected to get silk fibres. The various steps involved are:
(i) Rearing of silkworms: A female silk moth lays hundreds of eggs at a time. The eggs are stored by the farmers at suitable temperature and humidity under hygienic conditions. When the eggs hatch, silkworms come out of the eggs. The silkworms are fed mulberry leaves. After 25-30 days, the silkworms stop eating and get ready to spin cocoons. The silkworms enclose themselves completely inside the silken cocoons in two or three days.
(ii) Processing of cocoons to obtain silk fibres: The pile of cocoons is placed in hot water. Hot water makes the silk fibres of cocoons to separate out. The long fibres are obtained by unwinding the threads from cocoons. This process is called reeling.
(iii) Converting silk fibres into silk cloth: Silk fibres obtained from cocoons are spun (twisted) to form silk threads called silk yarn. The silk yarn is then woven on looms into silk cloth by the weavers.

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Define the term waste

Posted by K Manjunatha 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Meghna Thapar 6 years ago

Garbage from household is termed as waste. The part of garbage which can rot in nature to form harmless substances is called biodegradable waste. The part of garbage which cannot rot in nature to form harmless substances is called non-biodegradable waste.

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what is mean by cartilage with photo

Posted by Akshay Nilkanthe 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 1 month ago

Cartilage is a stiff yet flexible connective tissue. It is not as hard and rigid as bone but is stiffer and less flexible than a muscle. Cartilage is and elastic tissue that covers the end of the bones at a joint.
Cartilage acts as a cushion or sponge and absorbs shock at the joints.
It is present at joints between bones, the rib cage, the ear, the nose, the elbow, the knee, the ankle, the bronchial tubes and the intervertebral discs.

1Thank You

ANSWER

Is it dangerous when air bubbles are popped near the joint? Can you explain briefly about air bubbles.

Posted by Adithi Laxmeesha 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

0 answers

ANSWER

How is space made

Posted by Samyuktha Gedela 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

0 answers

ANSWER

How will you sparate husk or dirt particles from a give sample of pulse before cooking

Posted by Amritha Sunil 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Amritha Sunil 7 years, 1 month ago

Husk or dirt particles can be separate by winnowing being lighter will fly away from pulses

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What is ' gizzard'and how is it usefull in earthworms

Posted by Aryan Pathak 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Charanjeet Kaur 7 years, 1 month ago

Food such as soil enters the earthworm's mouth where it is swallowed by the pharynx. ... The gizzard uses stones that the earthworm eats to grind the food completely. The food moves into the intestines as gland cells in the intestine release fluids to aid in the digestive process.

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How is common salt separated from sea water

Posted by Dev Patel 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

4 answers

Tanya Gupta 7 years, 1 month ago

By evaporation

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Aditya Kumar 7 years, 1 month ago

By evaporation

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Aditi Kulkarni 7 years, 1 month ago

First the mud will be digged near the sun light. Then the salty water will put in the digged part . Then water will be evaporated and only salt will be left. Which is again purified in the factories and packed to sell

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Ved .. 7 years, 1 month ago

Evaporation

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Dry seeds and soaked seeds.Which seeds will germinate?Why?

Posted by Senthil Kumar 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Meghna Thapar 6 years ago

Seeds need water to germinate, and absorb it from the soil or the damp paper towel, or the warm water. This allows the stored food reserves in the seeds to begin to break down, and these are used by the growing plant until it has its own leaves and can make its own food through photosynthesis.
Seeds that are kept completely dry will not germinate, which means that seeds can be stored for one year to the next.

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What is key word of snow

Posted by Piyush Agrawal 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

2 answers

Aditi Kulkarni 7 years, 1 month ago

The key word for snow is fog

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Hunar Mittal 7 years, 1 month ago

The cold water in the form of snow

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What are the adaptations shown by plants found in boreal forest

Posted by Manju Diwakar 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)

1 answers

Meghna Thapar 6 years ago

Some boreal forest animals avoid the stresses of winter by spending the cold season in hibernation. Brown bears and black bears, marmots, and jumping mice hibernate. Wood frogs and many species of insects hibernate so deeply that their bodies actually freeze.In winter, the boreal forest's colors shift from greens, browns, yellows, and reds to whites and greys. Some animals, such as ermine, snowshoe hare, and ptarmigan, change their colors accordingly-making them harder to see as they forage or hunt.

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Why do travellers use property of magnets ?

Posted by Priti Thakur 5 years, 10 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Ritesh Kumar 7 years, 1 month ago

When we suspend a magnet freely it points towards north south. When they know the direction they see that which pole points towards north and which point towards south. Then, they mark the poles N and S as north and south. They take it with them when they travel and if they forgotten the route they see directions by suspending the same magnet marked N and S. This help them to travel.

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Where was magnetite first discovered ?

Posted by Priti Thakur 7 years, 1 month ago

CBSE > Class 06 > Science (OLD)