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

a)Through the process of fermentation, yeast converts sugars into carbon dioxide and alcohol. These two byproducts make yeast an extremely useful tool in food production. b) Carbon dioxide is what gives alcoholic beverages such as beer and champagne their characteristic bubbles and is also responsible for rising bread.

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What is the meaning of pasteurisation and pasteurization

Posted by Priya Singh 3 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Yatharth Agrawal 3 years ago

Pasteurisation means killing of microbes by heating milk on 72°C

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Kartik Ghuraiya 3 years ago

Pasteurisation means fermentation

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ANSWER

AgNo3 +Nal (aq)

Posted by Lucky Singh Rajput ☺️☺️ 3 years, 1 month ago

CBSE > Class 08 > Science

0 answers

ANSWER

Hello

Posted by Nakul Chowdhury 3 years, 1 month ago

CBSE > Class 08 > Science

4 answers

Kajal Goswami 3 years ago

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Srishti Kumari 3 years, 1 month ago

Hii

1Thank You

Lucky Singh Rajput ☺️☺️ 3 years, 1 month ago

3Thank You

Lakshmi A 3 years, 1 month ago

3Thank You

ANSWER

Metals and non metals elements

Posted by Gopal Dhiman 3 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Ansh Yadav 3 years ago

Non metal diamond Metal copper graphic

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Aaryan Dhiman 3 years, 1 month ago

Metal are copper , iron

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ANSWER

Copper is

Posted by Vijayashanthi K 3 years, 1 month ago

CBSE > Class 08 > Science

5 answers

Sarthak Bhamare 3 years, 1 month ago

Metal

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Lucky Singh Rajput ☺️☺️ 3 years, 1 month ago

Transition Metal

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Aarsh Dev 3 years, 1 month ago

Copper is a metal

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Harshit Changer... 3 years, 1 month ago

Metal

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Vijayashanthi K 3 years, 1 month ago

Silver

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ANSWER

What is called malleability?

Posted by Pragyanparamita Pradhan Pragyan 3 years, 1 month ago

CBSE > Class 08 > Science

5 answers

Lucky Singh Rajput ☺️☺️ 3 years, 1 month ago

Metals are malleable -the property which allow the metal to be harm into the seat is malleability. Example - almunium told, gold paper, silver paper. most of the natural matal are malleabl

1Thank You

Sanjeev Nayak 3 years, 1 month ago

The process by which a metal can be hammerd and turn into sheet

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Harshit Changer... 3 years, 1 month ago

The process by which a metal can be hammerd and turn into sheet

1Thank You

Gopal Dhiman 3 years, 1 month ago

The process of beaten into thin sheet known as malleability

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Pragyanparamita Pradhan Pragyan 3 years, 1 month ago

No answer.....

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ANSWER

What is meant by staining

Posted by Bunny 🐇 3 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Arnab Das 3 years, 1 month ago

Staining is an auxiliary technique used in microscopy to enhance contrast in the microscopic image.

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ANSWER

Who is Robert hooke

Posted by Mehak Munjal 3 years, 1 month ago

CBSE > Class 08 > Science

4 answers

Azhar Amin Ganie 3 years ago

He discovered a dead cell,from the bark of a tree in 1605

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Kartik Ghuraiya 3 years ago

The first scientist who found a dead cell in the work of oak tree

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Aarsh Dev 3 years, 1 month ago

The scientist who discovered cell in 1665

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Bunny 🐇 3 years, 1 month ago

An English scientist

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ANSWER

Write one use each of any two metals and non-metals.

Posted by Bhargav Bora 3 years, 1 month ago

CBSE > Class 08 > Science

5 answers

Kartik Ghuraiya 3 years ago

Metals are ductile that means they can be drawn into thin wires metals are malleable that means they can be hamered and made into thin sheets. Non metal are used in such as graphite which is used in pencil which is also good conductor of heat and electricity metals are lustrous like iodine .

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Lucky Singh Rajput ☺️☺️ 3 years, 1 month ago

Fe , Cu are example of metal. C , O are example of non metal

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Kavana Gowda 3 years, 1 month ago

Metals - aluminium and zinc used for making foil papers Non -metal - air and water Used for breathing; daily use

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Dhruthi J 3 years, 1 month ago

Gold - Jewellary Iron - Machinary Oxygen - breating Chlorine - purifying water

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Atmaja Gayval 3 years, 1 month ago

Metal Use - For making electric wires Example - copper Non metals Use - For breathing Example - oxygen

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Explain why some fibre are called synthetic?

Posted by Saksham Negi 3 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Babika Orang🌹 3 years, 1 month ago

Because the production of cotton is decreasing gradually so the product of clothes is by chemical fibre

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Keshav Singh 3 years, 1 month ago

Natural fibre are man made fibres making with material synthetic fibre harn ful for the environment used for making wood pilu,animal skinn

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ANSWER

Silver jwellery turns dark over a peroid of time

Posted by Kishlay Sahu 3 years, 1 month ago

CBSE > Class 08 > Science

4 answers

Yatharth Agrawal 3 years ago

Silver tarnished black after sometimes on exposure to air

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Kartik Ghuraiya 3 years ago

It is because the silver jewellery get in contact to each other and hit together so they loose their Shine and get dark.

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Lucky Singh Rajput ☺️☺️ 3 years, 1 month ago

Yes, because its contented with air

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Kavana Gowda 3 years, 1 month ago

Because it comes in contact with air

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ANSWER

Chemical properties of metal

Posted by M.Dharshini M.Dharshini 3 years, 1 month ago

CBSE > Class 08 > Science

5 answers

Yatharth Agrawal 3 years ago

Metals can react with base,acids and water

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Kartik Ghuraiya 3 years ago

Metals are made up of items atoms are the smallest part of matter proton neutron and electron are the subtomic parts of metal chemical properties a metal is like sodium and potassium which is capital kerosene because if we will kept in air it will burn and from the respective oxides.

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Trishita Lenka 3 years, 1 month ago

*** karaga mera saath

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Lucky Singh Rajput ☺️☺️ 3 years, 1 month ago

Metal show different chemical properties.

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Yogesh Apsunde 3 years, 1 month ago

Ch केमिकल प्रॉपर्टीज ऑफ मेटल

2Thank You

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Metal Oxides are basic or acidic??

Posted by Ved Patel 3 years, 1 month ago

CBSE > Class 08 > Science

5 answers

Harshit Changer... 3 years, 1 month ago

Basic

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Dhruthi J 3 years, 1 month ago

Basic

1Thank You

Atmaja Gayval 3 years, 1 month ago

Basic

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Sidda8B 8B 3 years, 1 month ago

Basic

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Rameswari Mohapatra 3 years, 1 month ago

Basic

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ANSWER

Write note polination

Posted by Kavya Prasad 3 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Sidda8B 8B 3 years, 1 month ago

1Thank You

Ved Patel 3 years, 1 month ago

Pollination is the act of transferring pollen grains from the male anther of a flower to the female stigma. The goal of every living organism, including plants, is to create offspring for the next generation. One of the ways that plants can produce offspring is by making seeds.

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Chapter 5

Posted by Dhairya Veer 3 years, 1 month ago

CBSE > Class 08 > Science

0 answers

ANSWER

Why does tuberculosis considered as infectious diseases? Note:-This question is of science chapter-2(Microorganisms:Friend and foe).

Posted by Ananya Shrivastava 3 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Dhairya Veer 3 years, 1 month ago

What is bitumen

3Thank You

ANSWER

Petroleum defination

Posted by Anushka Yadav 3 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Aryan Sisale 3 years, 1 month ago

Crop defination

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Audnxtbf dhidbdhd. Dgsk dtsn dtz. Srsb xfnd xykd xyn td ctdmbd

Posted by Aditya Singh 3 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Harshit Changer... 3 years, 1 month ago

Madar chod

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ANSWER

Why is a virus different from other microorganism

Posted by Manvi Choudhary 3 years, 1 month ago

CBSE > Class 08 > Science

3 answers

Kartik Ghuraiya 3 years ago

Different from other because it nonliving and living characteristics are different it is made up of nucleic acid and DNA or RNA they can only be seen by electron microscope branch of science that deals with the study of virus is known as virology.

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Aradhya Vikas 3 years, 1 month ago

They are host organism which develop inside body of hosts 👍

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Mohit Saluja 3 years, 1 month ago

Virus is non cellular in nature . It is different from others as they are inert outside the host organisms I.e. they cannot multiply outside the host organisms

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ANSWER

Reflection of light

Posted by Pramod Panwar 3 years, 1 month ago

CBSE > Class 08 > Science