CBSE > Class 08 > Science | CBSE Board | Homework Help

Yes,we should avoid plastics. 1. On burning it releases poisonous smell. 2. On throwing plastics in the drains it blocks drains as a result it may cause flood. 3. On the garbage heap animals swallow the plastics with food .

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Define state of motion of an object

Posted by Somu Babu 7 years, 7 months ago

CBSE > Class 08 > Science

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Pull out gram from the field and observe its root draw the diagram and show the root nodules

Posted by Alibha Muna 7 years, 7 months ago

CBSE > Class 08 > Science

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Why its neccessary to prevent the spread of microorganism even though they are harmful for us

Posted by Alibha Muna 7 years, 7 months ago

CBSE > Class 08 > Science

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Collect five pieces of thermosetting and thermoplastic things

Posted by Ajay Singh 7 years, 7 months ago

CBSE > Class 08 > Science

0 answers

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Define biological nitrogen fixers.

Posted by Mahi Bhardwaj 7 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Priya Bhagoria 7 years, 7 months ago

some bacteria are able to fix nitrogen directly from the atmosphere to the plant roots to enrich soil fertility.therefore, these are known as biological nitrogen fixers.

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Agriculture machines names

Posted by Gurleen Chahal 7 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Anushka Parashar 7 years, 7 months ago

Tractor 2)plow 3)harrow4 )drill5) baler 6)planter 7)cultivator 8)loader

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What is corrosion

Posted by Santhosh S 7 years, 7 months ago

CBSE > Class 08 > Science

2 answers

Mohit Roy 7 years, 7 months ago

Corrosion is the process in which metals, are deteriorated by action of air, moisture, chemicals etc. Corrosion causes damage to car bodies, bridges, iron railings, ships and all objects made of metals (especially Iron). Iron in the presence of air and water, forms Iron (III) oxide, which is known as rust. The corrosion of Iron is called Rusting.

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Yogita Ingle 7 years, 7 months ago

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Difference between nutrition and nutrients

Posted by Payal Tailor 7 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 7 months ago

Nutrition is ‘the process of providing or obtaining the food necessary for health and growth’.
Nutrients are ‘substances that are essential for the maintenance of life and for growth’.
So it could be said that nutrients provide us with nutrition or that nutrition provides us with nutrients.

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What do you understand by chance of state of motion of an object

Posted by Vaishnavi.T.P Vaishnavi.T.P 7 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 7 months ago

The first law of motion states that until and unless there is an external force acts on a particular body the body remains at the state of motion or at rest. The law envisages the fats that unless we apply a force on some stationary body the body remain at rest and if a body is at motion we need to apply another opposing force to stop the body.
Sometimes we apply some extra force to change the motion of the body at motion and it speeds up. At times the body accelerates once we apply uniform force over a period of time and these helps the students understand the concept of motion and force better.

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WHICH of these is fiber derived from chemical

Posted by Abhiraj Singh 7 years, 7 months ago

CBSE > Class 08 > Science

2 answers

Akhil Tomar 7 years, 7 months ago

Nylon

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Abhiraj Singh 7 years, 7 months ago

a rayon. B cotten. C nylon D silk

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About animals

Posted by Thapaswini Eesha Reddy 7 years, 7 months ago

CBSE > Class 08 > Science

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Define algae

Posted by Kumar Aditya 7 years, 7 months ago

CBSE > Class 08 > Science

2 answers

Rohit Jena 7 years, 7 months ago

Algae are not aquatic in nature they used to grow in the region where there is no sunlight

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Yogita Ingle 7 years, 7 months ago

Algae are simple plant- like organisms which are usually aquatic in nature. They contain a cell wall and chlorophyll and can make their own food by photosynthesis. Algae can be unicellular or multicellular. Some of the common examples are diatoms, chlamydomonas, and seaweed.

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What is the difference between manure and fertilizers

Posted by Arun Prasanna Poniyappan 7 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Uzair Ahmed 7 years, 7 months ago

Manure is a natural substance while fertiliser is an inorganic salt .

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What are fibres

Posted by Pavitra Nimbal 7 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 7 months ago

A material which is available in the form of thin and continuous strand is called fibre.
Types of Fibre
Natural fibers: The fibers which are obtained from plants and animals are called natural fibers. Examples: cotton, jute, silk, wool.
Plant Fibre: Cotton and jute are plant fibre.
Animal fibre: Silk and wool are animal fibre.
Synthetic fibre: The fibre which are synthesized in industry from simple chemicals obtained from petroleum are called synthetic fibre. Examples: Nylon, Acrylic, Polyester

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Two places from where petroleum is obtained

Posted by Aarushi Saxena 7 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Uzair Ahmed 7 years, 7 months ago

Sea,ocean & land .

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Nam name the tool used with a tractor for sowing seed in the field

Posted by Akshat Jain 5 years, 9 months ago

CBSE > Class 08 > Science

3 answers

Rohit Jena 7 years, 7 months ago

Seeddrill

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Akhil Tomar 7 years, 7 months ago

Plow

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Ankush Kumar 7 years, 7 months ago

Cultivator

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Name 7 steps in crop production and management

Posted by Aarushi Agrawal 7 years, 7 months ago

CBSE > Class 08 > Science

4 answers

Anushka Parashar 7 years, 7 months ago

Preparing the soil Sowing seeds Improving soil fertility Irrigation Protection of crop Harvesting Storage

1Thank You

Akhil Tomar 7 years, 7 months ago

1)Preparation of soil,2)sowing,3)add manure,4)irrigation,5)protect from weeds,6)harvesting,7)stroage

1Thank You

Kunal Sharma 7 years, 7 months ago

1)Preparation of soil 2)sowing 3)adding manure 4)irrigation 5)protect from weeds 6)harvesting 7)storage

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Mohammad Abutalha 7 years, 7 months ago

(1)preparation of soil ,(2)sowing,(3)adding manure and fertilisers

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Why do we grow different plants in different places?

Posted by Ankit Kandari 7 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Anushka Parashar 7 years, 7 months ago

To add nutrition in soil

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What is friction and pressure

Posted by Abdul Kalam 7 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 7 months ago

Pressure : Pressure is the force acting on a unit area on an object. Pressure = Force/Area on which it acts
Friction: When one surface is moving over another surface, a force comes into play and opposes their relative motion. This force is called friction or force of friction. Friction always opposes motion because it acts in opposite direction to motion. Force of friction arises due to contact between two surfaces. If there is no contact between two surfaces there would be no friction.

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A train 100 m longis cross a river of bridgeof length 800 m. What time he take to cross bridge.train moves with a constant velocity of 36km/h

Posted by Anurag Anand 7 years, 7 months ago

CBSE > Class 08 > Science