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

Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon.

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At room temperature, mercury is a: liquid, solid, gas, non-metal, which is correct?

Posted by Noman Shaikh 4 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 4 years, 11 months ago

Mercury (Hg) is liquid at room temperature.

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The ability of a metal to be drawn into a wire is a measure of its: ductility, malleability, sonority, reactivity, which is correct?

Posted by Noman Shaikh 4 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 4 years, 11 months ago

The ability of a metal to be drawn into a wire is a measure of its ductility.

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When iron combines with oxygen, it forms: hydrogen gas, rust, a precipitate, a non-metal which is correct?

Posted by Noman Shaikh 4 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 4 years, 11 months ago

Iron combines with oxygen to produce rust, which is the compound named iron oxide.

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ANSWER

A non- metal that is highly lustrous is: carbon, diamond, graphite, quartz, which is correc?

Posted by Noman Shaikh 4 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 4 years, 11 months ago

Non metal with lustrous property are Iodine (I), Graphite and Diamond.

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The most abundant non-metal within the earth's crust is: Oxygen, quartz, phosphorus, sulphur, which is correct?

Posted by Noman Shaikh 4 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 4 years, 11 months ago

Oxygen is the most abundant non-metal on the earth.

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If a substance does not react in dilute acid, it could be: sodium, potassium, phosphorus, calcium, which is correct?

Posted by Noman Shaikh 4 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 4 years, 11 months ago

Copper and mercury metal does not react with dilute hydrochloric acid as it comes after hydrogen in the activity series, i.e., they can't replace hydrogen from hydrochloric acid..

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A metal that is non-magnetic is, nickel, Cobalt, iron, gold, which is correct?

Posted by Noman Shaikh 4 years, 11 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Please give me answer of ??question

Posted by S Godara 4 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Rhea Sharma 4 years, 11 months ago

Which question?

1Thank You

ANSWER

What is the colour of nonluminous (outermost) zone of a candle flame

Posted by S Godara 4 years, 11 months ago

CBSE > Class 08 > Science

3 answers

Meghna Yadav 4 years, 11 months ago

Blue

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S Godara 4 years, 11 months ago

Blue or slightly yellow

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S Godara 4 years, 11 months ago

Please fast

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ANSWER

Small piece of sodium put in beaker full of water. Write in words

Posted by Vaman Mayache 4 years, 11 months ago

CBSE > Class 08 > Science

2 answers

Harshit Malviya Malviya 4 years, 11 months ago

Hello

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Gaurav Seth 4 years, 11 months ago

Most of the metals do not react with water. However,alkali metals react vigorously with water. Reaction of sodium metal with water: Sodium metal forms sodium hydroxide and liberates hydrogen gas along with lot of heat when reacts with water. When sodium reacts with water, sodium hydroxide is formed hydrogen gas as a byproduct that gets burnt with a bright flame making the reaction highly exothermic.

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ANSWER

Tell me different between eukaryotic and prokaryotic

Posted by , , 4 years, 11 months ago

CBSE > Class 08 > Science

5 answers

Atharva Padamwar 4 years, 11 months ago

Yes

1Thank You

Atharva Padamwar 4 years, 11 months ago

Yes

1Thank You

Atharva Padamwar 4 years, 11 months ago

Yes

1Thank You

, , 4 years, 11 months ago

Thanks ☝️☝️☝️☝️☝️☝️☝️☝️?

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Yogita Ingle 4 years, 11 months ago

	Prokaryotes	Eukaryotes
Type of Cell	Always unicellular	Unicellular and multi-cellular
Cell size	Ranges in size from 0.2 μm – 2.0 μm in diameter	Size ranges from 10 μm – 100 μm in diameter
Cell wall	Usually present; chemically complex in nature	When present, chemically simple in nature
Nucleus	Absent. Instead, they have a nucleoid region in the cell	Present
Ribosomes	Present. Smaller in size and spherical in shape	Present. Comparatively larger in size and linear in shape

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There are how many type of friction 3or4. ????????

Posted by , , 4 years, 11 months ago

CBSE > Class 08 > Science

5 answers

, , 4 years, 11 months ago

Thanks to all who give me answer ???

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, , 4 years, 11 months ago

Thanks to all who give me and ☝️☝️☝️☝️☝️☝️☝️☝️☝️

1Thank You

, , 4 years, 11 months ago

No there are 4 types of friction static friction rolling friction sliding friction flide fiction

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Pratiush Sinha 4 years, 11 months ago

There are 6 type of friction..... Static friction Rolling friction Sliding friction Kinetic friction limmiting friction fluid friction

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Pratiush Sinha 4 years, 11 months ago

There are 6 type of friction..... Static friction Rolling friction Sliding friction Kinetic friction limmiting friction fluid friction

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ANSWER

What is kharif crop ?

Posted by Tejinder Singh 4 years, 11 months ago

CBSE > Class 08 > Science

5 answers

Ganesh Pradhan 4 years, 11 months ago

No, it is grown in rainy season

1Thank You

, , 4 years, 11 months ago

It is.ground in rainy season

2Thank You

Mihir Bag 4 years, 11 months ago

It is grown in rainy season

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Mihir Bag 4 years, 11 months ago

Sorry the above ans is wrong

1Thank You

Mihir Bag 4 years, 11 months ago

Kharif crop are grown in winter season

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ANSWER

How many cells are there in human body

Posted by , , 4 years, 11 months ago

CBSE > Class 08 > Science

5 answers

, , 4 years, 11 months ago

Thanks

0Thank You

Mihir Bag 4 years, 11 months ago

37.2 trillion

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Shaurya Rawat 4 years, 11 months ago

37.2trillion

3Thank You

Gurkirat Singh 4 years, 11 months ago

37.2 trillion cells are in human body

3Thank You

Lakshya Bhardwaj 4 years, 11 months ago

37.2 trillion

1Thank You

ANSWER

What is photosynthesis? Ans:

Posted by K D 5 years ago

CBSE > Class 08 > Science

5 answers

Lakshya Bhardwaj 4 years, 11 months ago

Photosynthesis is a process which plant make food by sunlight, minerals ,carbohydrates and wate

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Soumya Singh 4 years, 11 months ago

Process by which the plants grow there own food and release excess oxygen in air. For example: how plants convert sugar and energy , from water, sunlight,and air to grow.

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Sushma R 4 years, 11 months ago

The process by which green plants and some other organisms used to synthesise nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product

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Yuvraj Singh Shekhawat 4 years, 11 months ago

the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.

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Abhishek Pal 5 years ago

the process by which green plants turn carbon dioxide and water into food using energy from sunlight

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ANSWER

Which is the following can be beaten into thin sheets? a) Zinc ( ) b) Phosphorus ( ) c) Sulphur ( ) d) Oxygen ( )

Posted by K D 5 years ago

CBSE > Class 08 > Science

5 answers

Gurkirat Singh 4 years, 11 months ago

Zinc

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Soumya Singh 4 years, 11 months ago

A) Zinc.

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Yuvraj Singh Shekhawat 4 years, 11 months ago

Zinc

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Shruti Rani Panda 5 years ago

Sulphur

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K D 5 years ago

Ans: Zinc

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ANSWER

If someone had read my question and he or she knows the ans then please give me the ans of my question

Posted by S Godara 5 years ago

CBSE > Class 08 > Science

5 answers

Abhishek Pawar 4 years, 11 months ago

Anthracite contain large amount of carbon

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S Godara 4 years, 11 months ago

Which form of coal contains carbon in large amount

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Shubhra Janwalkar 4 years, 11 months ago

Repeat the question

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Deepika Rathi 4 years, 11 months ago

Pls pardon your question

1Thank You

Sushma R 5 years ago

Can u please repeat ur question

1Thank You

ANSWER

What is the purest form of coal

Posted by S Godara 5 years ago

CBSE > Class 08 > Science

5 answers

Shaurya Rawat 4 years, 11 months ago

Anthracite is ans ?% correct

2Thank You

Gurkirat Singh 4 years, 11 months ago

Coke is a purest form of coal

1Thank You

Soumya Singh 4 years, 11 months ago

Anthracite coal is the purest form of coal, because they having the highest degree of coalification.

2Thank You

Gangadhar Rao 5 years ago

Coke is the purest form of coal

2Thank You

Rajesh Parida 5 years ago

Coke is the purest form of coal

1Thank You

ANSWER

Differentiate between natural and chemical fertilizers

Posted by Soundarya More 5 years ago

CBSE > Class 08 > Science

2 answers

, , 4 years, 11 months ago

Fertilizers: A fertilizer is an inorganic salt. Fertilizer is prepared in factory. A fertilizer does not provide any humus soil. Fertilizers are very rich in plant. nutrients like nitrogen Phosphorus and potassium. Manure: manure is a natural substance obtained by the decomposition of cattle dung human waste and plant residues . Manure can be prepared in the field. Manure provides a lot of humus to the soil. Manure is relative less rich in plant nutrients

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Sushma R 5 years ago

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ANSWER

Definition of kharif corps & Rabi crops

Posted by Gagan Parmar 5 years ago

CBSE > Class 08 > Science

2 answers

, , 4 years, 11 months ago

The crops which are sown in the rainy season are called kharif crops the rainy season in India is generally from June to September paddy maize soybean groundnut cotton etc are Kharif crops The crops grown in the winter season are called rabi crops their time period is generally from October to March examples of rabi crops are wheat gram mustard and linseed decide this pulses and vegetables are grown during summer at many places

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Sushma R 5 years ago

3Thank You

ANSWER

What happens to the sound produced when you strike a glass as you increase the level of water in it

Posted by Shikha Biswal 5 years ago

CBSE > Class 08 > Science

1 answers

Vijay Kumar Bhartiya 5 years ago

Pop

1Thank You

ANSWER

What are microorganisms?

Posted by Kritika Vaid 5 years ago

CBSE > Class 08 > Science

3 answers

Abhishek Pawar 4 years, 11 months ago

The organisms which cannot be seen by naked eyes

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Yuvraj Singh Shekhawat 4 years, 11 months ago

Microbes are tiny living things that are found all around us and are too small to be seen by the naked eye. They live in water, soil, and in the air. The human body is home to millions of these microbes too, also called microorganisms

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Sushma R 5 years ago

Microorganism or microbe is a microscopic organism which may exist in its single celled form or a colony of cell

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ANSWER

Name some different tool used for agriculture and how they are used and where they are used.

Posted by Sushma R 5 years ago

CBSE > Class 08 > Science

1 answers

Sushma R 4 years, 11 months ago

Please give me the answer for this question

1Thank You

ANSWER

Give me the meaning of pulses and grains.and some examples on pulses and some examples on grains

Posted by Sushma R 5 years ago

CBSE > Class 08 > Science

3 answers

K D 5 years ago

The seeds of sone plants such as beans and peas that are cooked and eaten as food....

1Thank You

Riya Patil 5 years ago

the seeds of some plants such as beans and peas that are cooked and eaten as food दालें

1Thank You

Riya Patil 5 years ago

the seeds of wheat, rice, etc. are grains

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ANSWER

Why matchstick cannot burn if we scratch it on rough surface? Why matchstick only burns on side of matchstick?

Posted by Shristi Singh 5 years ago

CBSE > Class 08 > Science

2 answers

Abhishek Pawar 4 years, 11 months ago

Due to friction

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Yogita Ingle 5 years ago

On rubbing the match stick in the rough surface, the friction converts this work into heat. The heat raises the temperature of the chemical present on the match stick head to its ignition temperature. Due to this the chemical substance catches fire and the match stick starts burning.

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ANSWER

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