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

The cycle of producing and releasing a mature egg, the thickening of the uterus wall, and it's shedding if fertilization does not occur is known as the menstrual cycle. The menstrual cycle is controlled by hormones.

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Ananya Agrawal 2 years, 11 months ago

From ovary every 28 to 30 days one matured ovum /egg is released, during this period the uterine wall in female prepares itself to receive the developing fertilised egg. In case there is no fertilisation, the thickened lining of uterine wall breaks down and goes out of the body along with the blood.This is called menstruation.

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ANSWER

Insulin hormone secretion by

Posted by Purusottam Sethy 2 years, 11 months ago

CBSE > Class 08 > Science

4 answers

Manogna G S 2 years, 10 months ago

Pancreas

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Tanmay Sharma 2 years, 11 months ago

Pancreas

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Ananya Garg 2 years, 11 months ago

Pancreas even they secrete glucagon

1Thank You

Shubhangi Mishra 2 years, 11 months ago

Pancreas

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ANSWER

Define circuit

Posted by Tejas Aradhya 2 years, 11 months ago

CBSE > Class 08 > Science

3 answers

Bhawna Kumari 2 years, 11 months ago

Two terminal of bulbs called circuit

1Thank You

Abhishek Kashyap 2 years, 11 months ago

What is lighte

1Thank You

Paras Sumer Singh 2 years, 11 months ago

Circular journey

3Thank You

ANSWER

Define lighting ?????????¿

Posted by Bhanu Kashyap 2 years, 11 months ago

CBSE > Class 08 > Science

2 answers

Paras Sumer Singh 2 years, 11 months ago

Light is a form of energy

0Thank You

Yash Singh 2 years, 11 months ago

Light is a form of energy

1Thank You

ANSWER

Endocrine and exocrine

Posted by Anuska Pattnayak 2 years, 11 months ago

CBSE > Class 08 > Science

3 answers

Jesalini M.J 2 years, 10 months ago

Endocrine - hormone producing glands

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Ananya Garg 2 years, 11 months ago

Endocrine are ductless glands but Exocrine has ducts that mean pipe

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Bhawna Kumari 2 years, 11 months ago

Wo enclorine hoga

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ANSWER

Explain adolescence

Posted by Khushee Sethiya 2 years, 11 months ago

CBSE > Class 08 > Science

5 answers

Vinayak Upadhyay 2 years, 11 months ago

Adolescence is a period in between 13 to 19. It is also known as teenage period. In this period the body growth of girls and boys occurs rapidly . Some changes during adolescence are Menstrual cycle in females Acne, pimples Hair growth in underarms, pubic region Size Health Height Weight etc. Are some of the changes occured during adolescence or teenage. The girl or boy in teenage are known as teenager.

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Bhawna Kumari 2 years, 11 months ago

The period of life,when the body under goes change leading of reproductive maturity is called adolescence.

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Sarshini Mohan 2 years, 11 months ago

Growing up is a natural process. The period of life, when the body undergoes changes, leading to reproductive maturity, is called adolescence. Adolescence begins around the age of 11 and lasts upto 18 or 19 years of age. Since this period covers the ‘teens’ (13 to 18 or 19 years of age), adolescents are also called ‘teenagers’. In girls, adolescence may begin a year or two earlier than in boys. Also, the period of person to person.

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Ananya Sharma 2 years, 11 months ago

Adolescence is a transitional stage of physical and psychological development that generally occurs during the period from puberty to legal adulthood. Adolescence is usually associated with the teenage years, but its physical, psychological or cultural expressions may begin earlier and end later.

1Thank You

Khushee Sethiya 2 years, 11 months ago

Explain adolescence

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ANSWER

Hey all u can ask any questions

Posted by Chhavi Chaudhary 2 years, 11 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Write the structure of electroscope and explain how it is working?

Posted by Shakti Prasad Singh 2 years, 11 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Anyone knows kannada

Posted by Varshini H. J. 2 years, 11 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Why do different substance produce different flame colours?

Posted by Lakshya Garg 2 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Kanu Choudhary 2 years, 11 months ago

Because the colour of the depends upon the temperature of the flame and nature of the substance burning

1Thank You

ANSWER

What would happen if animal have cell wall

Posted by Mahi Dahlan 2 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Ananya Agrawal 2 years, 11 months ago

If animal cell will have cell wall, it would not be able to do any of the usual activities like run, eat etc....

1Thank You

ANSWER

Two astronaut are floating close to each other in space Can they talk to each other with out using any special device ? Give reason

Posted by Aman Yadav 2 years, 11 months ago

CBSE > Class 08 > Science

3 answers

Kanu Choudhary 2 years, 11 months ago

No in space sound does not travel

0Thank You

Priyanshi Deswal 2 years, 11 months ago

No, they can not talk in space because sound need medium to travel and in space there is vacuum

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Sia ? 2 years, 11 months ago

We know that sound waves are longitudinal waves. Longitudinal waves need a medium to travel. Longitudinal waves are transported through particles. For sound waves, they travel through compression and rarefaction. They travel through different sequences of waves of pressure through a compressible media. Sounds can propagate through different media of solid, liquid and gas. Sound waves travel by vibrations of molecules. In fact, when sound travels through different types of media, its speed changes. When sound travels in solid, its speed is more when comparing the speed of sound with respect to liquid and gas.
This is because the density of solids is more; hence the molecules are nearer to each other. Because the molecules are nearer, they collide with each other more frequently; hence the numbers of vibrations are more, so the sound travels faster in denser substances. Thus the speed of sound in air is slower as compared to solids and liquids.

1Thank You

ANSWER

What is mineral

Posted by Pushpit Raj 2 years, 11 months ago

CBSE > Class 08 > Science

2 answers

Jesse Trina ? 2 years, 11 months ago

A mineral is a natural substance of organic or inorganic origin with definite chemical and physical properties.

2Thank You

Rawan Ji 2 years, 11 months ago

A naturally occurring substance that has a definite chemical composition is a mineral.

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ANSWER

Explain the term cloning

Posted by Devesh Ochani 2 years, 11 months ago

CBSE > Class 08 > Science

5 answers

Ananya Agrawal 2 years, 11 months ago

The individual which are morphologically and genetically similar to one another as well as their parents, are called clones.

0Thank You

Kriti Lalotra 2 years, 11 months ago

Production of exact copy of a cell

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Vinayak Upadhyay 2 years, 11 months ago

Actually cloning is removed from my syllabus so I can not explain you my dear ??

0Thank You

Jesse Trina ? 2 years, 11 months ago

The production of an exact copy of a cell, a part of the animal or the complete animal through asexual reproduction is called cloning.

1Thank You

Fatima Rahman❣️❣️ 2 years, 11 months ago

Cloning is the process of generating a genetically identical copy of a cell or an organism. Cloning happens all the time in nature.

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ANSWER

Rock shelters are found inside ----

Posted by Mêľîśá Ãñńä 2 years, 11 months ago

CBSE > Class 08 > Science

2 answers

Sia ? 2 years, 11 months ago

Rock shelters are found inside the Satpura National Park. These are the prehistoric evidences of human life in these jungles, which give us an idea about the life of primitive humans.

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Jesse Trina ? 2 years, 11 months ago

Satpura National Park

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ANSWER

What is carbonisation. The one who will answer first will get points.

Posted by Piyush Kurrey 2 years, 11 months ago

CBSE > Class 08 > Science

2 answers

Manogna G S 2 years, 10 months ago

The the process converting wood into a Coal is called carbonization

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Soumya Gagneja 2 years, 11 months ago

The process of conversion of dead plant remains into coal is called carbonisation

1Thank You

ANSWER

Suppose, we want to make a zinc coating on a spoon. Draw and explain how the coating will be take place?

Posted by Shakti Prasad Singh 2 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Soumya Gagneja 2 years, 11 months ago

It will take place using electroplating.

1Thank You

ANSWER

Answers of chapter 8 cell-structure and functions please

Posted by Archana Pulluri 2 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Mêľîśá Ãñńä 2 years, 11 months ago

Chapter 8 Cell Structure and Functions

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ANSWER

What is the respiratory organ of human

Posted by Tanish Agrawal 2 years, 11 months ago

CBSE > Class 08 > Science

5 answers

Ananya Agrawal 2 years, 11 months ago

Lungs

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Ananya Sharma 2 years, 11 months ago

? Lungs

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Nargis Kamal 2 years, 11 months ago

Lungs

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Soumya Gagneja 2 years, 11 months ago

Lungs

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Hemalata Behera 2 years, 11 months ago

Lungs

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ANSWER

How many planets are there in solar system

Posted by Shreya Chauhan 2 years, 11 months ago

CBSE > Class 08 > Science

5 answers

Nargis Kamal 2 years, 11 months ago

8 planets

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M.V Khiran Kumar 2 years, 11 months ago

It is 9 but now it is 8

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Anshu Yadav 2 years, 11 months ago

8 planet in our solar system?✨?✨?

0Thank You

Monica ✨☄️ 2 years, 11 months ago

8 Planets

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Hemalata Behera 2 years, 11 months ago

8 planets in solar system

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ANSWER

1 kilogram of weight is how much pressure

Posted by S. Poorjith Saravanavel 2 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Hatdik Sharma 2 years, 11 months ago

98,066.5 pascals

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ANSWER

What is menstruation cycle

Posted by Atharv Singh 2 years, 11 months ago

CBSE > Class 08 > Science

3 answers

Ananya Agrawal 2 years, 11 months ago

0Thank You

Bhawna Kumari 2 years, 11 months ago

The process of the shedding of the utenus lining along with its blood vessel own a regular monthly basis called menstruation

0Thank You

Shaheema Saifi 2 years, 11 months ago

The shed off of blood vessels when pregnancy doesn't occur is called Menstruation. Menstruation starts from age 11 to 12 first menstrual cycle is called Menarche and the end of menstrual cycle is called menopause. Menstrual cycle occurs between 28 days and average menstrual cycle is of 4 to 7 days

1Thank You

ANSWER

What is amplitude.

Posted by Manav Marshal 2 years, 11 months ago

CBSE > Class 08 > Science

4 answers

Manogna G S 2 years, 10 months ago

The maximum distance moved by an vibrating body is called Amplitude.

0Thank You

Soumya Gagneja 2 years, 11 months ago

The maximum height achieved by a vibrating body on either side of its central position is called amplitude.

1Thank You

Bhavya S 2 years, 11 months ago

The maximum displacement of the vibrating object from its mean position in an oscillation is called amplitude.

2Thank You

Nikita Nikita 2 years, 11 months ago

Oscillation at pendulam time period. Oscillation per time is known as amplitude

3Thank You

ANSWER

Explain water cycle

Posted by Shivanand Wali 3 years ago

CBSE > Class 08 > Science

2 answers

Sarthak Jain 3 years ago

Yes

0Thank You

Hikaru Nakamura 3 years ago

Water cycle reffer to a process of evaporation and precipitation.When water is vapourise into gas with the help of evaporation and form clouds to rain and rain water stay in surface and the process repeat itself.These is called water cycle

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ANSWER

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