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ANSWER

What is physical and chemical changes

Posted by Suresh Gori 6 years, 1 month ago

CBSE > Class 07 > Science

2 answers

Naman Ahden 6 years ago

physical changes are changes that takes place around us and in which no new substance form. these changes are generally reversible but sometimes irreversible. chemical changes are changes in which new substance form these changes are always irreversible

Aditi Kulkarni 6 years, 1 month ago

Physical change is achane in which no new substances are formed And chemical change is a change in which one or more new substances are formed

ANSWER

What is ph value of base

Posted by Deepali Soni 6 years, 1 month ago

CBSE > Class 07 > Science

2 answers

Naman Ahden 6 years, 1 month ago

7 onwards to 14

Rishit Jindal 6 years, 1 month ago

The ph value of base is 8 to 14.

ANSWER

How pollution harm our body

Posted by Sanskriti Sharma 6 years, 1 month ago

CBSE > Class 07 > Science

2 answers

Mayuri Tayade 6 years, 1 month ago

Bxggsje

Sunil Singh 6 years, 1 month ago

What is rusting

3Thank You

ANSWER

Why we need heart ? And why wecannot be with out heart?.

Posted by Shaik Musthafa 6 years, 1 month ago

CBSE > Class 07 > Science

3 answers

Shaik Musthafa 5 years, 11 months ago

Thanks

Divyansh Jain 6 years, 1 month ago

We need heart because it pumps blood and transports oxygen to all parts of the body. We cannot live without heart because it transports oxygen which helps in our survival. Without it we can not survive.

Aditi Kulkarni 6 years, 1 month ago

We need heart because it pumps blood to all parts of our body. We cannot live without heart because if it does not pump blood then their will be no circulation of blood.

ANSWER

Write an experiment through proof the air we breathe out contains carbon dioxide

Posted by Bhavesh Patel 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 6 years, 1 month ago

Aim: To show the presence of Carbon dioxide in air

Apparatus: Lime water is placed in a test tube which is provided by two outlets A and B

Procedure: Air is sucked slowly from the outlet B.

Observation: The lime water in the test tube turns milky.

Conclusion: On sucking air from outlet B, the atmospheric air is allowed to enter through the inlet A which further passes in the lime water. Thus, the atmospheric air contains Carbon dioxide which reacts with lime water and turns it milky.

ANSWER

Write an experiment through proof the air we breathe out contain carbon dioxide

Posted by Bhavesh Patel 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 6 years, 1 month ago

Aim: To show the presence of Carbon dioxide in air

Apparatus: Lime water is placed in a test tube which is provided by two outlets A and B

Procedure: Air is sucked slowly from the outlet B.

Observation: The lime water in the test tube turns milky.

ANSWER

Which one will effect on your clothes weather or climate? Why ?

Posted by Any Khan 6 years, 1 month ago

CBSE > Class 07 > Science

5 answers

Any Khan 6 years ago

Why ?

Debashrita Sahoo 6 years, 1 month ago

Sorry weather

Debashrita Sahoo 6 years, 1 month ago

Wrather

Dharshini Sengottuvel 6 years, 1 month ago

Weather

Any Khan 6 years, 1 month ago

Weather

ANSWER

पोषण किसे कहते हैं

Posted by Kundan Rav 6 years, 1 month ago

CBSE > Class 07 > Science

2 answers

Ranjitsingh Gill 6 years, 1 month ago

I don't know?

Gaurav Seth 6 years, 1 month ago

पोषण

भोजन ग्रहण करने तथा उससे प्राप्त ऊर्जा का शरीर की विभिन्न प्रक्रिया में प्रयोग करने की प्रक्रिया पोषण कहलाती है।
पोषक तत्व:
विभिन्न प्रकार के अवयव जो विभिन्न क्रियाओं जैसे ऊर्जा प्रदान करने, शरीर के विभिन्न भागों की मरम्मत तथा उपापचयी क्रियाओं के नियमन में सहयोग देते हैं। पोषक तत्व कहलाते है। उदाहरण के लिये - प्रोटीन, विटामिन, शर्करा, वसा इत्यादि।

ANSWER

Why do veins have valves but not the arteries

Posted by Sarah Rahman 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

.. ... 6 years, 1 month ago

The main function of the valves in veins is to prevent back flow of blood. Blood in the arteries, after being pumped by the heart, are under much higher pressure than blood in veins so there is no need for valves in arteries to prevent back flow. Blood in veins is under much lower pressure as it is returning to the heart from the various organs and tissues and so has a risk of back flow if the valves are not present to prevent it.

ANSWER

Name the invertebrates with segment leg

Posted by Ramabai Rama 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Arthropoda are triploblastic, bilaterally symmetrical and metamerically segmented animals.

ANSWER

A simple pendulam takes 325sec.to complete 20 oscillation what is the time period of Pendulum

Posted by Surya Chauhan 6 years, 1 month ago

CBSE > Class 07 > Science

0 answers

ANSWER

How many country in the world?

Posted by Zunaid Shahu 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

Yash Garg 6 years, 1 month ago

195 countries Countries in the World: There are 195 countries in the world today. This total comprises 193 countries that are member states of the United Nations and 2 countries that are non-member observer states: the Holy See and the State of Palestine.

ANSWER

What does the process of fertilization takes place in flower

Posted by Ayush Sharma 6 years, 1 month ago

CBSE > Class 07 > Science

2 answers

Dharshini Sengottuvel 6 years, 1 month ago

For next generation crop

Renuka Seiwal 6 years, 1 month ago

For next generation crop

ANSWER

What is a focal length

Posted by Veerabhadraiah B.Matta 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

The focal length (f) of a mirror is the distance between its pole (P) and principal focus (F).

ANSWER

Why we yawn when we are sleepy or drowsy

Posted by Yuvraj Singh Shekhawat 6 years, 1 month ago

CBSE > Class 07 > Science

2 answers

Naman Ahden 6 years ago

when we yawn or feels sleepy, there is not enough oxygen in the lungs, so, whenever we yawn, oxygen is pumped into our lungs, thus there is sufficient amount of oxygen for breathing

Renuka Seiwal 6 years, 1 month ago

When we are sleepy, we breath slowly,so we get less Oxygen.To get sufficient oxygen we yawn

ANSWER

Why we yawn when we are sleepy or drowsy?

Posted by Yuvraj Singh Shekhawat 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

Utsav And Luv 6 years, 1 month ago

Because we feel very tired after working in day

ANSWER

Class 4

Posted by Panneer Selvam 6 years, 1 month ago

CBSE > Class 07 > Science

0 answers

ANSWER

Differences between anaerobic and aerobic respiration

Posted by Arjun Rawat 6 years, 1 month ago

CBSE > Class 07 > Science

2 answers

Rishit Jindal 6 years, 1 month ago

: Aerobic respiration is a type of which occur in the presence of oxygen to generate energy. : Anaerobic respiration is a type of respiration which occur in the absence of oxygen.

Pragya Gupta 6 years, 1 month ago

• aerobic respiration occurs in the presence of oxygen. • anaerobic respiration occurs in the absence of oxygen.

ANSWER

Name the country which belong to polar region

Posted by Vin Pro 6 years, 1 month ago

CBSE > Class 07 > Science

3 answers

Naman Ahden 6 years, 1 month ago

Canada,russia,norway,england,finland,greenland,finland and other top countries of europe?

Utsav And Luv 6 years, 1 month ago

Norway, Canada, Denmark (Greenland), sweden and finland

Any Khan 6 years, 1 month ago

Norway , Finland , sweden and russia

ANSWER

Write main organ of urinary system and their function

Posted by Bhanu Sahu 6 years, 1 month ago

CBSE > Class 07 > Science

2 answers

Any Khan 6 years, 1 month ago

Hope it helps

3Thank You

Any Khan 6 years, 1 month ago

Main organs of urinary system are -kidneys ,ureters ,urinary bladder and urethra Function::its function is to eliminate waste from the body ,regulate blood volume and blood pressure , controls levels of electrolytes and regulate blood pH

3Thank You

ANSWER

Difference between a Horizon and C Horizon of soil

Posted by Devendra Lande 6 years, 1 month ago

CBSE > Class 07 > Science

2 answers

Utsav And Luv 6 years, 1 month ago

In Ahorizon, humus is present in very high quantity and minerals is present in low quantity but In C horizon humus is absence and minerals are present in low quantity.

Any Khan 6 years, 1 month ago

A horizon -It is the topmost layer of soil It is very fertile C horizon -It lies below the subsoil It is infertile due to the absence of humus

ANSWER

What is the meaning of transportation

Posted by Rajesh Kumar 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

Aaradhya Baghla 6 years, 1 month ago

It is a process in which leaves loss water from them. This is called transportation.

ANSWER

The speed of a train is expressed in m/h yes or no

Posted by Pruthviraj Patil 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

Any Khan 6 years, 1 month ago

No the correct formula is m/s

ANSWER

H how does glucose help the patient recover

Posted by Dharmendra Panwar 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Glucose is the simplest form of carbohydrate i.e. Energy. In a heathy body, after eating, food breaks down into smaller form in order to release energy. but in unhealthy body especially patients, this breakage process gets slower as digestion affected due to illness. Glucose instantly mixes in blood inside body as it is already is in ready to soluble form and releases energy to recover.

ANSWER

What is Ameba

Posted by Saurav Raj 6 years, 1 month ago

CBSE > Class 07 > Science

5 answers

Naman Ahden 6 years, 1 month ago

A unicellular organism is called amoeba

Monisha H R 6 years, 1 month ago

Amoeba is a single cellar organism

Sravani Sathagopam 6 years, 1 month ago

A single celled small living organism is called amoeba

Any Khan 6 years, 1 month ago

Amoeba is a unicellular organism

Harman Singh Gill 6 years, 1 month ago

a very small living creature that consists of only one cell

ANSWER

Other than water there is any other subtrance which can change into all three state (Solid,Liquid,Gas) ?

Posted by Arnav Arya 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

Any Khan 6 years, 1 month ago

Yes ice

ANSWER

Differentiate between arteries and veins

Posted by Dharmesh Mali 6 years, 1 month ago

CBSE > Class 07 > Science

2 answers

.. ... 6 years, 1 month ago

Veins:- (1)Veins have thin walled elastic walls with large lumen. (2)Veins carry blood back to the heart from the different parts if body. (3)They are placed close to skin. (4)The blood does not moves with pressure so to prevent the backward flow of blood,they have valves. (5)All veins carry deoxygenated blood except pulmonary vein which carry oxygenated blood back to the heart.

.. ... 6 years, 1 month ago

Arteries:- (1)Arteries have thick elastic walls with less lumen(cavity). (2)They carry blood away from the heart to different parts of the body. (3)They are deeply placed under the skin. (4)The blood moves with pressure inside them so they dont have valves in them. (5)All arteries carry oxygenated blood except pulmonary artery which carry deoxygenated to the lungs for purification.