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ANSWER

Describe how cystals of copper sulphate are prepared

Posted by Anushk Vijay 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Aman Aman 7 years, 4 months ago

The crystals of copper sulphate can be prepared by the process of crystalisation.Few drops of dilute sulphuric acid is added to a cupful of water.This water is heated.Copper sulphate powder is added to it still no more powder can be dissolve. Allow the solution to cool.After some time crystals of copper sulphate are formed.

ANSWER

What are natural acids?

Posted by Om Mali 7 years, 4 months ago

CBSE > Class 07 > Science

3 answers

Raghav Luthra 7 years, 4 months ago

Acids which we get from plants and animals and which are not harmful are called natural acids

Santhosh.D Santhosh.D 7 years, 4 months ago

Substance which present in plants and animals are called natural acid ?????

Om Mali 7 years, 4 months ago

ANSWER

What is glass made of

Posted by Om Mali 7 years, 4 months ago

CBSE > Class 07 > Science

3 answers

Deepanshu Lunayach 7 years, 4 months ago

काँच

Yash Sainani 7 years, 4 months ago

Plastic

Ashish Negi 7 years, 4 months ago

Ice

ANSWER

Glass is a example of

Posted by Ayushi Kandpal 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Glass is a non-crystalline, transparent amorphous solid, that has widespread practical, technological, and decorative use.

ANSWER

What are the main conditions necessary for the flow of heat?

Posted by Best Player 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 7 years, 4 months ago

For conduction of heat from one object to other, it must satisfy two conditions. Firstly, the objects should be in contact with each other. Secondly, they should have different temperature. But in this case, only the first condition is satisfied; hence, the heat energy will not be transferred.

ANSWER

What is meant by reeling of silk

Posted by Ayush Aggarwal 7 years, 4 months ago

CBSE > Class 07 > Science

2 answers

Deepanshu Lunayach 7 years, 4 months ago

Sericulture

Kopal Kashyap 5 years, 9 months ago

Ojal

ANSWER

How soil pollution formed?

Posted by Rajeev Yadav 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Shiva Singh 7 years, 4 months ago

ANSWER

Silk thread is obtain from

Posted by Best Player 7 years, 4 months ago

CBSE > Class 07 > Science

4 answers

Anshika Dubey 7 years, 4 months ago

Silk worms

Joanna Paulin 7 years, 4 months ago

Silk worm

Om Mali 7 years, 4 months ago

Silk worm

3Thank You

Rajeev Yadav 7 years, 4 months ago

Silk worm

ANSWER

What is soil and the diagram of its

Posted by Jaswinder Singh 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Ananya Ananya 7 years, 4 months ago

Soil is one of the most important natural resources.it supports the growth of plant by holding the roots firmly and supply water and nutrients.soil is essential for agricultural .soil is an inseparable part of our life.

ANSWER

Give 2 A4 size papers information about meteorological department of imdia

Posted by Suma Kompalli 7 years, 4 months ago

CBSE > Class 07 > Science

0 answers

ANSWER

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CBSE > Class 07 > Science

2 answers

Konkana Bhattacharjee 7 years, 4 months ago

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ANSWER

Curd plus blue litmus paper

Posted by Ragul Vijay 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Curd is acidic in nature containing lactic acid. When blue litmus paper is dipped in curd, it turns red showing that curd is acidic in nature.

ANSWER

When does monsoon occur

Posted by Rishta Rathore 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

The land near the equator of earth heats up faster than the water in oceans in summers. The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land. These are monsoon winds. The monsoon winds carry lot of water from the oceans and bring large amount of rains on land.

ANSWER

In which place will rusting of iron will occur more- in coastal areas or in hilly areas??

Posted by Aviskha And Anchit Talukdar 7 years, 4 months ago

CBSE > Class 07 > Science

5 answers

Raghav Luthra 7 years, 4 months ago

Rusting of iron will occur more in costal area Because more moisture present in costal areas in comparison of hilly area

Aman Aman 7 years, 4 months ago

In coastal areas. because in the coastal areas there will be more moisture and oxygen. when the iron comes contact with the moisture and oxygen.it gets rusting.

Shubham Jha 7 years, 4 months ago

In coastal areas

Arpita Bhattacharjee 7 years, 4 months ago

In coastal areas.

Rudrajit Chandra 7 years, 4 months ago

In coastal areas

3Thank You

ANSWER

What do you understand by hot and wet climate

Posted by Subhodip Mukherjee 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Konkana Bhattacharjee 7 years, 4 months ago

Hot and wet climate means the weather of a place where it is very hot throughout the year but is also wet because of the moisture present in the air this type of climate where the moisture and the hottness in a atmosphere gets contrasted it therefore forms a hot and wet climate.

ANSWER

What is a chemical change? What is a chemical reaction

Posted by Lalit Lalit Chandel 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Arpita Bhattacharjee 7 years, 4 months ago

A change in which one or more new substance is formed, is called a chemical change. A chemical change is also called a chemical reaction .

ANSWER

Distinguish between uniform and non uniform motion. Give one example of each ?

Posted by Danish Khan 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 7 years, 4 months ago

Uniform motion- The motion of a particle or a body is said to be uniform if:
1. It moves along a straight line.
2. It covers equal distance in equal intervals of time.
Example- motion of a car in a straight line which covers equal distance in equal intervals of time
Non uniform motion- The motion of a particle or a body is said to be non uniform if:
1. It covers unequal distance in equal intervals of time.
2. It covers equal distance in Unequal intervals of time.
Example-motion of a car in a crowded road .

ANSWER

What is range of clinical thermometer?

Posted by Best Player 7 years, 4 months ago

CBSE > Class 07 > Science

3 answers

Lalit Lalit Chandel 7 years, 4 months ago

35 to 45

Mir Umar Ali 7 years, 4 months ago

35 to 42

Gourav Gorai 7 years, 4 months ago

35° To 42° Celcius

5Thank You

ANSWER

Why is fleece scoured?

Posted by Best Player 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Pari Lodha 7 years, 4 months ago

Fleece is scoured because to remove dust, dirt and Greece

ANSWER

Why anaerobic bacteria digest animal waste and produce biogas .the biogas is then burnt as fuel why this is a chemical change

Posted by Kalash Thapa 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

The organic solid matter collected at the bottom of the sedimentation tank is called sludge which is continuously removed by scrapers. The sludge collected is sent to separate tanks called digesters where it is broken down by anaerobic bacteria and biogas is released.

ANSWER

What is kink

Posted by Akshada Behar 7 years, 4 months ago

CBSE > Class 07 > Science

2 answers

Himang Raj Yadav 7 years, 4 months ago

Kink is prevent in thermometer to prevent mercury falling from its own

3Thank You

Aman Aman 7 years, 4 months ago

kink is present in thermometer near the bulb. it is a curve shape line in the thermometer.

ANSWER

Organisms need take food

Posted by Rajeev Arya 7 years, 4 months ago

CBSE > Class 07 > Science

3 answers

Himang Raj Yadav 7 years, 4 months ago

Organisms need to take food for maintenance of their body and for growth

Aman Aman 7 years, 4 months ago

for proper growth.

Jaimina Gharia 7 years, 4 months ago

To survive and for energy

ANSWER

Science ko learn kaise kare

Posted by Sunny Kumar 7 years, 4 months ago

CBSE > Class 07 > Science

4 answers

Vansh Kamboj 7 years, 4 months ago

Science is very easy to learn but if you understand it. It will become easier. I don't learn science L understand it

Ananya Ananya 7 years, 4 months ago

First read the chapter and mark main point and by the help of adult understand the chapter clearly then you are ready for learn exercise

Himang Raj Yadav 7 years, 4 months ago

Firstly , not to learn science and try to understand it

Muskaan Aggarwal 7 years, 4 months ago

To learn science, understand the concept first.

ANSWER

What are the different points you will keep in mind if you are given an opportunity to name cyclones

Posted by Sarita Sharma 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 7 years, 4 months ago

Fast moving air towards a centre; usually with heavy rain; is known as cyclone. Wind direction, wind speed, humidity and temperature together create cyclone. The wind from the surroundings moves in a circular fashion towards the centre and gives rise to cyclone. A strong cyclone can be very destructive. Since cyclone is accompanied with high speed wind, it can damage houses, telephone poles, electric poles and uproot trees.

ANSWER

What are the different points you will keep in your mind if you are given an opportunity to name a cyclone

Posted by Sarita Sharma 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Effective Safety Measures:

A cyclone forecast and warning service.
Rapid communication of warnings to the Government agencies, the ports, fishermen, ships and to the general public.
Construction of cyclone shelters in the cyclone prone areas, and administrative arrangements for moving people fast to safer places.

Actions on the part of people:

Do not ignore the warnings issued by the meteorological department through tv radio, or newspapers.
We should make necessary arrangements to shift the essential household goods, domestic animals and vehicles, etc. to safer places
Avoid driving on roads through standing water as floods may have damaged the roads and
Keep ready the phone numbers of all emergency services like police, fire brigade, and medical centres.
Remain ready to evacuate the threat areas as required.

ANSWER

Life cycle of silkworm

Posted by Kartik Madankar 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Rishabh Sain 7 years, 4 months ago

Eggs-larva-coccon-silk moth

ANSWER

What is physical or chemical change

Posted by Himanshi Garg 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Those changes in which no new substances are formed are called physical changes.
Those changes in which new substances are formed are called chemical changes.

ANSWER

Difference between physical and chemical changes.

Posted by Best Player 7 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Ananya Ananya 7 years, 4 months ago

Physical change a change in which a substance undergoes a change in its physical properties is called physical change. Chemical change. A change in which one or more new substances are formed is called chemical change