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

The Group I elements in the periodic table (lithium, sodium, potassium, etc.) are highly reactive because of their single valence electron. When potassium reacts with water, the electrons will be attracted to the highly positive hydrogen ion.
2 K(s) + 2 H₂O(l) → KOH(aq) + H₂ (g) + Heat
This is a much lower energy state for the potassium as it requires a lot of energy for the potassium to hold onto the extra electron. This energy is released as heat in an explosion.

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Math class 7

Posted by Arti Jain 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

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what is comuflage

Posted by Rashmi Agarwal 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Arnav Tyagi 7 years, 11 months ago

To blend in the surroundings some animals have light or blending color . This ability is called camouflage...

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Define filament (inside the bulb)

Posted by Gyandeep Rathore 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Salomi Gopinath 7 years, 11 months ago

Thin wire inside the bulb that gives off light is called filament

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Gaurisa Yadav 7 years, 11 months ago

Coiled metal wire that flow when current is passed through it

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Which vitamin in our body to stop blood

Posted by Bhawna Jain 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 11 months ago

Vitamin K is used to treat and prevent low levels of certain substances (blood clotting factors) that your body naturally produces. These substances help your blood to thicken and stop bleeding normally (e.g., after an accidental cut or injury). Low levels of blood clotting factors increase the risk for unusual bleeding. Low levels may be caused by certain medications or medical conditions. Vitamin K helps to treat and prevent unusual bleeding by increasing the body's production of blood clotting factors.

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Adavtation in aqatic animals

Posted by Srijit Das 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

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How does a bird move??

Posted by Sanskruti Bajaj 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 11 months ago

Birds are arboreal in habit. Birds exhibit two types of locomotion. They fly in the air. They can also walk. A bird has a body best suited for flight. Forelimbs are modified into its wings. Birds have light and hollow bones. The breast bones are connected to strong muscles which help them to flap their wings during flight. The tail controls the direction of flight. Birds have very strong shoulder bones. Birds can walk and perch on trees with the help of their hind limbs.

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How can groundwater get polluted during farming

Posted by Dhiraj Shinde 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 11 months ago

Much like chemicals and other man-made solutions, pesticide is prone to washing into the soil after heavy rainfalls, especially when it is used frequently by farmers and other members of the agricultural industry. The chemicals involved in pesticides are very dangerous for both human and animal consumption, and when they reach groundwater, they can almost never be completely removed.

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What is water vapour

Posted by Mayank Tomar 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Anushka Jha Mithi 7 years, 11 months ago

Gaseous form of water

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What is air write it's functions

Posted by Shahajahan Ansari 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Mayank Tomar 7 years, 11 months ago

Air is a mixture of many gases mainly oxygen,nitrozen,small amount of carbon dioxide,water vapour and dust particles

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The place on the stem where the leaf arises

Posted by Ishita Rathore 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Anushka Jha Mithi 7 years, 11 months ago

Nodes

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Ishita Rathore 7 years, 11 months ago

Node

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Which is

Posted by Ishita Rathore 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

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Which is not a modified leaf

Posted by Ishita Rathore 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

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Terminal

Posted by Chandana Roy 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Anushka Jha Mithi 7 years, 11 months ago

Terminal of a bulb is the point at which the electric current is connected to the bulb

2Thank You

Mayank Tomar 7 years, 11 months ago

A bulb has two terminal that is connected to filament

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Bulb

Posted by Chandana Roy 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Umang Keshwani 7 years, 11 months ago

A bulb is a device that converts electric energy to light energy.

2Thank You

Gaurisa Yadav 7 years, 11 months ago

Device that converts chemical energy into light energy

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What is filament?

Posted by Namrata Bellary 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Anushka Jha Mithi 7 years, 11 months ago

Part of the bulb through which electric current is passed

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Tanvi Subramanian 7 years, 11 months ago

Filament is a part of the bulb through which electric current is passed

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How does an earth worm move

Posted by Sree P 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Salomi Gopinath 7 years, 11 months ago

An earthworm moves by alternative extinction and contraction of the body by using muscles. Tiny bristles on the underside of the body help in gripping the ground.

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can you explain fertilization of flower

Posted by Abdul Rehman Rashid 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Anushka Jha Mithi 7 years, 11 months ago

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How do brestles help earthworm

Posted by Kunsh Aggarawl 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Salomi Gopinath 7 years, 11 months ago

Bristles help in gripping the ground

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Can you think of creating a shape that would give a circular shadow if held in

Posted by Nikita Bhowmick 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

3 answers

Gaurisa Yadav 7 years, 11 months ago

Cylinderical shape

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Anushka Jha Mithi 7 years, 11 months ago

Yes.......

1Thank You

Rajdeep Singh 7 years, 11 months ago

Yes

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What is the circuit

Posted by Kingler Rejoy Pramanick 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 11 months ago

A closed path through which the electric current flows is called an electric circuit. The direction of electric current in an electric circuit is from the positive terminal to the negative terminal. This is opposite to the direction of flow of electrons; which is from the negative terminal to the positive terminal.

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what do acrylic fibers make

Posted by Rashmi Agarwal 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 7 years, 11 months ago

Acrylic resembled wool and hence is also called synthetic wool. It is cheaper and more durable than wool, and is easier to wash and maintain.
Characteristics of Synthetic Fibres:
(i) They are less expensive.
(ii) They are readily available.
(iii) They can be easily washed.
(iv) They are easy to maintain.

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How are adaptation of a submerged plant different from the floating ones

Posted by Hermoine Granger 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

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What is a function of stem in plant

Posted by Navneet Saroj 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Aditya Ranjan 7 years, 11 months ago

The funcation of stem is to hold the plant up right and conduct water to the leaves, flower,fruits.

2Thank You

Sandra Mathias 7 years, 11 months ago

1.stem keeps the plant upright 2.it serves as a link between roots, leaves and flowers. 3.it carries minerals, water and salt from the roots to the leaves and also to different parts of the plant 4.it also carries food prepared by the leaf to different parts of the plant

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What are bone in our body

Posted by Satyam Baghel 7 years, 11 months ago

CBSE > Class 06 > Science (OLD)