CBSE > Class 10 > Science | CBSE Board | Homework Help

Human circulatory system consists of blood, arteries, veins, capillaries, lymph etc which help in the transportation and circulation of minerals, oxygen, nutrients etc from on organ to another.

2Thank You

Kirti Ranjan 3 years ago

A system which helps an organism in transportation or food and nutrients is known as circulatory system. Human circulatory system consists of blood plasma capillaries and heart.

2Thank You

Omya Aryan 3 years ago

Acids are sour in taste which turns blue litmus red.

1Thank You

Zoher Kalynpura 3 years ago

What is the acid

1Thank You

Omya Aryan 3 years ago

Human circulatory system consists of blood, arteries, veins, capillaries, lymph etc which help in the transportation and circulation of minerals, oxygen, nutrients etc from on organ to another.

2Thank You

ANSWER

What is the photosynthesis

Posted by Shilpi Kumari 3 years ago

CBSE > Class 10 > Science

5 answers

Keerti Mishra 3 years ago

The process by green plants carbon dioxide and water to convert their food in the present of sunlight are called photosynthetic

0Thank You

Shazid Raza 3 years ago

Photosynthesis is the process by which autotrops make their own food in the presence of sunlight and carbon dioxide with the help of chlorophyll and water

1Thank You

Shivam Choudhary 3 years ago

The process by which green plant turn carban dioxide and water into food using energy from sunlight

1Thank You

Puja Rani 3 years ago

Photosynthesis is a process by which autotrophs take in substances from the outside and convert them into stored forms of energy.

1Thank You

Omya Aryan 3 years ago

Photosynthesis is a process by which autotrophs take in substances from the outside and convert them into stored forms of energy.

1Thank You

ANSWER

What is the substance by which match box brown substance is made?

Posted by Madhu Patil 3 years ago

CBSE > Class 10 > Science

2 answers

Puja Rani 3 years ago

Phosphorus

1Thank You

Omya Aryan 3 years ago

The brown strip on match box is made by red phosphorus and powder glass

1Thank You

ANSWER

Important term in the chapter our environment

Posted by Shruti Singh 3 years ago

CBSE > Class 10 > Science

3 answers

Shruti Singh 2 years, 11 months ago

Thankyou for telling me the important topic of this chapter

1Thank You

Hitesh Singh 2 years, 11 months ago

Ecosystem... Tropic level ... Food chain .... Food web .... Biological magnification.... Ozone layer .... 10%law of energy... Ozone layer .... Depletion of ozone layer...

1Thank You

Soham Singh 3 years ago

Ecosystem, Food Chain and Food Web, Ozone layer depletion and about garbage

3Thank You

ANSWER

What is bud chewing ?

Posted by Vanshika Agrawal 3 years ago

CBSE > Class 10 > Science

0 answers

ANSWER

What is the mendels experiment

Posted by Kartik Sahu 3 years ago

CBSE > Class 10 > Science

1 answers

Supriya Kaluvala 3 years ago

Mendel experiment is about cross pollination and self pollination of pea plant . Mendel chose pea plant as it has different contrasting traits and it asexual and sexual flower so we can do dihybrid or monohybrid cross. From Mendels experiment two laws have been found . First is law of segregation and law of dominance

2Thank You

ANSWER

In Mendel's law of inheritance, there's genotype 1:2:1 & phenotype 3:1 after result of monohybrid cross. How it is possible explain with suitable cross. Which law states this ratio?

Posted by Account Deleted 3 years ago

CBSE > Class 10 > Science

1 answers

Jasmine . 3 years ago

Law of segregation

1Thank You

ANSWER

Which character of angiosperm is unique & explain with the help of diagram?

Posted by Account Deleted 3 years ago

CBSE > Class 10 > Science

0 answers

ANSWER

Define pottential difference

Posted by Ashutosh Sharma 3 years ago

CBSE > Class 10 > Science

1 answers

Omya Aryan 3 years ago

Potential difference is the amount of work done in moving 1 coulomb of charge in a unit time.

0Thank You

ANSWER

Taj Mahal, the great wonder of the world, is made of white marble which is composed of calcium carbonate. About 60 years ago it was discovered that this monument is being eaten away by acid rain. The Archeological survey of India, that looks after this building of historical importance is of the opinion that the atmospheric pollution due to vehicular traffic and industries, mainly Mathura Refinery may be a major cause of acid rain in and around the monument. Normal rain is slightly acidic because it absorbs some CO, from the atmospheric air. Acid rain is more acidic than normal rain because it also has absorbed oxides of nitrogen and sulphur. (a) What happens when marble is heated? Write the chemical reaction. What type of reaction is it. Name the product formed in this reaction which is used in the manufacture of cement. How will you test the gas evolved in this reaction. (b) Write down observations which help us to determine whether a chemical reaction has taken place or not. Or (b) A solution of a substance "X" is used for white washing. () Name the substance X and write its formula. (i) Write the reaction of substance X with water.

Posted by Sonali Negi 3 years ago

CBSE > Class 10 > Science

1 answers

Omya Aryan 3 years ago

(a) When marble(CaCO3) is heated, it decomposes into Quick lime(CaO) and Carbon dioxide(CO2). (b) •Change in temperature •Change in colour • Change in state •Evolution of gas. OR (b) Calcium Oxide (CaO) is used for white washing. (i) CaO+H2O -------› Ca(OH)2

5Thank You

ANSWER

Can anyone post chennai sahodaya science pre board question paper?

Posted by Mourya Selvaraj 3 years ago

CBSE > Class 10 > Science

0 answers

ANSWER

In an experiment with a rectangular glass slab a student observed that a ray of light incident at an angle of 55° with the normal on one face of the slab , after refraction strikes the opposite face of the slab before emerging out into air making an angle 40° with normal.Draw a labelled diagram to the angle of refraction and angle of emergence

Posted by Muskan Dhiman 3 years ago

CBSE > Class 10 > Science

0 answers

ANSWER

Explain with the help of a ray diagram why a pencil partially emerged in water appears to be bent at water surface

Posted by Muskan Dhiman 3 years ago

CBSE > Class 10 > Science

1 answers

Omya Aryan 3 years ago

It is due to a phenomenon called refraction. Light rays are unable to travel faster in water as compared to the air.

3Thank You

ANSWER

The near point of a hypermetropic eye is 50 can what is the nature and power of the lens required to enable him to read a book placed at 25cm from the eye

Posted by Tilak Gautam Gautam 3 years ago

CBSE > Class 10 > Science

1 answers

Aastha Vats 3 years ago

Convex lens , 2 dipometre

2Thank You

ANSWER

What is blood pressure ?

Posted by Aryan Khan 3 years ago

CBSE > Class 10 > Science

2 answers

Kriti Mallah 3 years ago

A condition in which the force of the blood against the artery walls is too high.

3Thank You

Aastha Vats 3 years ago

The force that blood exerts against the wall of a vessel is called blood pressure.

4Thank You

ANSWER

"As the blood sugar level in our body falls insulin secretion is reduced. " Justify this statement in the reference of feedback mechanism that regulates the timing and amount of hormone released.

Posted by Sharma Sharma 3 years ago

CBSE > Class 10 > Science

1 answers

Kriti Mallah 3 years ago

Insulin balance the sugar label in our body

1Thank You

ANSWER

What are the advantages of solenoid

Posted by Mriganko Biswas 3 years ago

CBSE > Class 10 > Science

3 answers

Devraj Sharma 3 years ago

A solenoid behave like a bar magnet

0Thank You

Soham Singh 3 years ago

Solenoid is a magnet that can be switched off and on. We can also change the strength of magnetic field by the increasing or decreasing of current

3Thank You

Diva Sand 3 years ago

Solenoid act as as a bar magnet It can even form an electromagnetic material

5Thank You

ANSWER

How to learn Ray diagram of physics

Posted by Naveen Yadav 3 years ago

CBSE > Class 10 > Science

4 answers

Dev Sharma 2 years, 11 months ago

It's easy to understand not learn . You can try ourself ray diagram and row wise understand it.

0Thank You

Shruti Singh 3 years ago

Do practice diagram will help you

0Thank You

Rohit Kumar 2 years, 11 months ago

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

Arsh Mia 3 years ago

It's easy just do some partice

0Thank You

ANSWER

What is the chemical formula for baking soda

Posted by Mohammad Farhan 3 years ago

CBSE > Class 10 > Science

5 answers

Khwaish Bansal 3 years ago

Na2CO3

0Thank You

Ashish Jadhav 3 years ago

NaHCO3

1Thank You

Vaishnavi Gundage 3 years ago

Ishwar kiske hriday mein vas karta hai Hindi

2Thank You

Omya Aryan 3 years ago

Sodium Bi Carbonate

2Thank You

Omya Aryan 3 years ago

NaHCO3

1Thank You

ANSWER

White washing

Posted by Sumbul Kaur 3 years ago

CBSE > Class 10 > Science

4 answers

Dev Sharma 2 years, 11 months ago

Calcium oxide

0Thank You

Jessika Chauhan 3 years ago

cao

0Thank You

Naveen Yadav 3 years ago

CaO

0Thank You

Omya Aryan 3 years ago

CaO i.e. Calcium Oxide

1Thank You

ANSWER

1.In the following practical set which of the following gas is emitted? (a)Hydrogen (b)Carbon monoxide (c)Carbon dioxide (d)Nitrogen

Posted by Abiya Afrin 3 years ago

CBSE > Class 10 > Science

1 answers

Omya Aryan 3 years ago

Hydrogen and Carbon dioxide

2Thank You

ANSWER

How did mendel experiment shows that different traits are inherited independently explain

Posted by Riya Panu 3 years ago

CBSE > Class 10 > Science

2 answers

Aastha Vats 3 years ago

During dihybrid cross by Mendel, it was observed that when two pairs of traits were considered; each trait expressed independently of the other.

2Thank You

Zoyaa Qamar 3 years ago

Mendel dihybridation experiment shows that that different traits are inherited independently In his experiment he took YELLOW AND ROUND SEED × GREEN AND WRINKLE SEED and get the ratio 9:3:3:1 Yellow and round: yellow and wrinkled: green and round: green and wrinkleed After these results the proposed his third law LAW OF INDEPENDENT ASSORTM ENT

1Thank You

ANSWER

Why do aquatic can't breath outside the water?

Posted by Tanvi Sree Sivapooja 3 years ago

CBSE > Class 10 > Science

2 answers

Divisha Sahani 3 years ago

In English While humans and terrestrial animals breathe oxygen from the air, aquatic animals use oxygen that is dissolved in water. An aquatic animal breathes by absorbing free oxygen into its blood through its gills or directly through its body surface.

5Thank You

Tanvi Sree Sivapooja 3 years ago

Because they can't breath directly from the atmosphere

5Thank You

ANSWER

What are monochromatic light rays

Posted by Amit Rana 3 years ago

CBSE > Class 10 > Science