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Meghna Thapar 5 years, 10 months ago
- Producers - Producers are the organisms which can be prepare their own food from simple inorganic substances like carbon dioxide and water by using sunlight energy in the presence of chlorophyll.
Example - Green plants and certain blue-green algae. - Consumers - Those organisms which consume food (eat food) prepared by producers are called consumers.
Example - Lion and Tiger.
(i) The animals which eat only plants are called herbivores. All herbivores are primary consumers. Example – Goat and cow.
(ii) The small carnivores which feed on herbivores (primary consumers) are called secondary consumers. Example – Frog and bird.
(iii) The Large carnivores (or top carnivores) which feed upon the small carnivores (secondary consumers) are called tertiary consumers. Example – Lion and tiger.
(iv) Those animals which eat both plants and animals, are called omnivores. Example – Crow, dog, man, sparrow.
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Secret Girl...? 6 years ago
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Ganga Rana 6 years ago
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Sana Ali 6 years ago
Yogita Ingle 6 years ago
1. As the current flows through coil in anticlockwise direction (d c b a), the force is experienced by arms ba and dc.
2. Applying Fleming's left hand rule, ba experiences a force upwards and dc experiences a force downwards.
3. The coil abcd experiences two parallel, equal and oppositely directed forces. The coil rotates in clockwise direction about its axle.
4. Split rings C1 and C2 move along with the coil. After half the rotation of the coil, C1 and C2 get interchanged. C1 is now in touch with Brush B2 and C2 is now in touch with brush B1. (See Fig. (ii) of electric motor.)
5. The direction of the current in the coil continues to be anticlockwise. However on comparing the two fig., the direction of current in arms ab and cd has reversed.
6. ab part of the coil experiences a downward force and cd experiences an upward force. The coil continues its clockwise motion under the effect of these opposite, equal and parallel forces.
7. Thus the electrical energy from the battery has been converted into the continuous mechanical rotational motion of the coil in a motor.
Posted by Rahul Sharma 6 years ago
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Diksha ? 6 years ago
Posted by Haribhau Kanherkar 6 years ago
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Bharat Patel 6 years ago
Tanya Dixit 6 years ago
Yogita Ingle 6 years ago
Hormones are chemicals released by the body to control and regulate the activity of certain cells and organs. Special glands known as endocrine glands secrete these hormones.
Posted by Geeta Yadav 6 years ago
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Geeta Yadav 6 years ago
Yogita Ingle 6 years ago
Focal length of lens of eye is adjusted accordingly to see an object using ciliary muscles, this ability of eye is called power of accommodation.
But, focal length of eye lens can be decreased to only a certain extent. Eye lens has a minimum limit to decrease its focal length. This limit is 25cm from eyes.
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Yogita Ingle 6 years ago
When electricity is passed through an aqueous solution of sodium chloride it decomposes to form sodium hydroxide. The process is called the chlor-alkali alkali process because of the products formed: chlor for chlorine and alkali for Sodium Hydroxide. Chlorine gas is given off at the anode and hydrogen gas at the cathode.
An aqueous solution of sodium chloride is called brine.
2NaCl (aq) + 2H2O(l) ---(electrolysis)---> 2NaOH(aq) + Cl2(g) + H2(g).
Posted by Nikhil Verma 6 years ago
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Harshita Verma 6 years ago
Yogita Ingle 6 years ago
| Ohmic Conductors | Non Ohmic Conductors |
| 1. Conductors that obey Ohm’s Law are called Ohmic conductors. 2. In Ohmic conductors, current is proportional to voltage. 3. Magnitude of current remains unchanged when current or voltage is reversed in Ohmic conductors. 4. In Ohmic conductors, temperature affects current and resistance. |
1. Conductors which do not obey Ohm’s Law are called Non-Ohmic conductors. 2. In Non-Ohmic conductors, current is not proportional to voltage. 3. Magnitude of current changeswhen current or voltage is reversed in Non-Ohmic conductors. 4. In Non-Ohmic conductors, different factors affect current and resistance. |
Ganga Rana 6 years ago
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Ganga Rana 6 years ago
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Ganga Rana 6 years ago
Yogita Ingle 6 years ago
A hydroelectric power station converts the kinetic, or movement, energy in flowing or falling water into electrical energy that can be used in homes and businesses. Hydroelectric energy can be generated on a small scale with a ‘run-of-river’ installation, which uses naturally flowing river water to turn one or more turbines, or on a large scale with a hydroelectric dam.
Posted by Tanushree Sharma 6 years ago
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Yogita Ingle 6 years ago
Khadins, tanks, nadis in Rajasthan, bandharas, tals in Maharashtra, ahars and pynes in Bihar, surangams in Kerala, bundhis in Madhya Pradesh, eris in Tamil nadu, Kattas in Karnataka are some of the water harvesting system.
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Posted by Anish Kumar 6 years ago
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Yogita Ingle 6 years ago
The first level is called producers and this consist of producers which are the green plants. Then comes the second level called the primary consumers like earthworms, which feeds on the green plants. Next is the secondary consumers like hens, birds which feeds on the earthworms. 4th level is the tertiary consumers including vultures, eagles, etc.
Posted by Harsh Pal 6 years ago
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Diya Jain 6 years ago
Yogita Ingle 6 years ago
In addition to giving plants their green color, chlorophyll is vital for photosynthesis as it helps to channel the energy of sunlight into chemical energy. With photosynthesis, chlorophyll absorbs energy and then transforms water and carbon dioxide into oxygen and carbohydrates. The process of photosynthesis converts solar energy into a usable form for plants, and the animals that eat them, forming the foundation of some food chains.
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Priyanshu Sinha 5 years, 11 months ago
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Yogita Ingle 6 years ago
Oxides of metals which have both acidic as well as basic behaviour are known as amphoteric oxides. Such metallic oxides react with acids as well as base to produce salt and water. Examples of Amphoteric oxides are aluminium oxide and zinc oxide.
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Viswajeet Sharma 6 years ago
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