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

Microorganisms are living organisms that are very minute to be seen by the naked eye and can be classified into four major groups namely bacteria, fungi, protozoa and some algae.

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Monika Pumah 2 years, 7 months ago

There are five types of microorganisms I) Bacteria ii)Fungi iii)protozoa iv)Algae v)Virus is also a microorganisms but is different from others because they depends on the hosts of others living organisms

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Describe how is coal made from deforestation?

Posted by Ragini Jain 2 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Jumana Anjum 2 years, 7 months ago

When trees are cut on a large scale and they are unused, they slowly get deeper into the soil as more soil deposited over them they goes more deeper into the soil. Under the soil there is no air so that the temperature is so high and pressure will also high. Due to high temperature and high pressure the dead plants get converted into coal. This is how coal made from deforestation.

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Give me some information about kaleidoscope and periscope

Posted by Sakshi Khandekar 2 years, 7 months ago

CBSE > Class 08 > Science

5 answers

Monika Pumah 2 years, 7 months ago

Kaleidoscope is a device based on multiple reflection it is made by using three triangle mirror if we put a bangles it shows a different patter in every time we can see different patter,so to make e.g, Rangoli we can use kaleidoscope.

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Sakshi Khandekar 2 years, 7 months ago

Do you have some information about periscope

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Sakshi Khandekar 2 years, 7 months ago

Thanks

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Ansh Raj 2 years, 7 months ago

Kaleidoscope is a device based on multiple reflections. It consists of three long and narrow stripes of mirrors inclined at an angle of 60⁰ to one another forming a prism. This prism is fitted in a cylindrical tube. One end of this tube is closed by a cardboard disc having a hole at its centre. To the other end touching the mirrors a plane glass plate is fixed on which coloured pieces of glass are placed. This end of the tube is closed by a round glass plate. The Kaleidoscope is ready. When we see through the hole, we can see different patterns. An interesting feature of kaleidoscope is that we will not see any pattern again.

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Janvi Bonde 2 years, 7 months ago

Periscope??

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ANSWER

Describe how the appearance of the moon change

Posted by Neha Gaur 2 years, 8 months ago

CBSE > Class 08 > Science

4 answers

Monika Pumah 2 years, 7 months ago

We see different appearance of moon because we see only the part which is reflected by the sun.

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Varnika Bhati 2 years, 7 months ago

Study about the phases of moon.

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Sakshi Khandekar 2 years, 7 months ago

Give me information about Kaleidoscope and periscope .

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Dev Bhanwala 2 years, 7 months ago

due to reflection of sunlight we can see only the part of moon on which sunlight fall and reflect

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Sound is produce by

Posted by Vansh Patel 2 years, 8 months ago

CBSE > Class 08 > Science

5 answers

Diksha Sharma 2 years, 8 months ago

Vibration

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Akash Agrawal 2 years, 8 months ago

Vibration

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Dev Bhanwala 2 years, 8 months ago

vibrating body

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M Srinivas Rao 2 years, 8 months ago

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Prateek Bengani 2 years, 8 months ago

Amitumake bhalo aachi

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Ajgwgga

Posted by Yug Chavda 2 years, 8 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

What is bone.?

Posted by Kaushtuv Kashyap 2 years, 8 months ago

CBSE > Class 08 > Science

4 answers

Sanjay .S 2 years, 7 months ago

Bone is living tissue that makes up the body's skeleton. There are 3 types of bone tissue, including the following: Compact tissue. The harder, outer tissue of bones.

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Harsh Kashyap 2 years, 7 months ago

A bone is a part of a skeleton

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Aman Saha 2 years, 7 months ago

A bone is a structure of human body

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Account Deleted 2 years, 8 months ago

A bone is a rigid organ that constitute a part of skeleton in most vertebrate animals.

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Soil is prepared for cultivation by ___________ it manually.

Posted by Reena Bishnoi 2 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Chandra Shrikant 2 years, 8 months ago

Plough

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ANSWER

Eye improvement tips

Posted by Deepak Pro 2 years, 8 months ago

CBSE > Class 08 > Science

4 answers

Sanjay .S 2 years, 7 months ago

Eat for your eyes. Eating carrots is good for your vision. Exercise for your eyes. Full body exercise for vision. Rest for your eyes. Get enough sleep. Create eye-friendly surroundings. Avoid smoking. Have regular eye exams.

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Atharva Swastik 2 years, 7 months ago

SI unit of wavelength is meter

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Harsh Kashyap 2 years, 7 months ago

By washing the eyes daily

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Rohit Tanwar 2 years, 8 months ago

What is unit of wavelength

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What is right spelling of testestoterone

Posted by Rajni Maheshwari 2 years, 8 months ago

CBSE > Class 08 > Science

4 answers

Monika Pumah 2 years, 7 months ago

Testosterone.

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Harsh Kashyap 2 years, 7 months ago

testosterone

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Dev Bhanwala 2 years, 8 months ago

testetrone

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Mohit Kumar Jangir 2 years, 8 months ago

Testosterone

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Organisms which cause damage to the crops and make them unfit for human consumption

Posted by Rija N 2 years, 8 months ago

CBSE > Class 08 > Science

2 answers

Siddi Karthikeya 2 years, 8 months ago

Hello mam s.karthikeya class 8th in kendriya vidyalaya school ongole pls I'm saying question pls answer me mam

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Siddi Karthikeya 2 years, 8 months ago

Hello

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ANSWER

What is the difference between combustible and noncombustible substance

Posted by Jagruthi Chitta 2 years, 8 months ago

CBSE > Class 08 > Science

2 answers

Radhe Shyam 2 years, 8 months ago

A substance that burn in air and produces heat and light upon burning is called combustible substance

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Radhe Shyam 2 years, 8 months ago

A substance not burn presence of air is called non combustible

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Is nitrogen a greenhouse gas

Posted by Nishant Choudhary 2 years, 8 months ago

CBSE > Class 08 > Science

5 answers

Dev Bhanwala 2 years, 8 months ago

yes

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Santanu Kumar Duria 2 years, 8 months ago

Yes

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Rajni Maheshwari 2 years, 8 months ago

Yes

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Antriksh Panwar 2 years, 8 months ago

Yes

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Nishant Choudhary 2 years, 8 months ago

Yes

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What is the scientific name of frog

Posted by Rahul Singh 2 years, 8 months ago

CBSE > Class 08 > Science

4 answers

Garima Sen 2 years, 8 months ago

Scientific name of frog is anura

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Rajni Maheshwari 2 years, 8 months ago

Anura

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Suprava Senapati 2 years, 8 months ago

Anura

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Suprava Senapati 2 years, 8 months ago

Don't know

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Describe the development of human embryo in the uterus

Posted by Jeswin Gonsalves 2 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Suprava Senapati 2 years, 8 months ago

First, the zygote becomes a solid ball of cells. Then it becomes a hollow ball of cells called a blastocyst. Inside the uterus, the blastocyst implants in the wall of the uterus, where it develops into an embryo attached to a placenta and surrounded by fluid-filled membranes.

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What is difference between diabetes mellitus and diabetes insipidus

Posted by Vishwajeet Kumar 2 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Jumana Anjum 2 years, 7 months ago

In diabetes mellitus, the level of glucose in your blood, also called blood sugar, is too high. Your kidneys try to remove the extra glucose by passing it in your urine. In diabetes insipidus, your blood glucose levels are normal, but your kidneys can't properly concentrate urine.

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Which gland is referred to as the master gland in human body? Give examples to justify its name.

Posted by Ram Raj 2 years, 8 months ago

CBSE > Class 08 > Science