CBSE > Class 07 > Science | CBSE Board | Homework Help

Experiences that made you think that air exerts pressure: (i) Balloons and balls can be used only when they are inflated with air. When the balloon is overfilled with air it bursts due to excessive air pressure. (ii) Blowing air can move curtains on doors and windows.

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Subject to experience that made you think that air exert pressure (other than those given in the text)

Posted by Salha Nuri 1 year, 3 months ago

CBSE > Class 07 > Science

1 answers

Sharma Sharma 1 year, 3 months ago

1Thank You

ANSWER

Write the occupational hazards in the wool industry and the skin industry

Posted by Gnana Karthika 1 year, 3 months ago

CBSE > Class 07 > Science

0 answers

ANSWER

Why human referred to as autotrophic

Posted by Om Majumder 1 year, 3 months ago

CBSE > Class 07 > Science

4 answers

Prem Prakash 1 year, 3 months ago

Humans are referred to as heterotrophs because they can't prepare there own food.

0Thank You

Ashwin Kumar 1 year, 3 months ago

They are not autotrophic ,the are hetrotrophic

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Sharma Sharma 1 year, 3 months ago

Yes they are hetrotorphs

1Thank You

Spandana Priyadarshini 1 year, 3 months ago

Human aren't autotrophic , they are heterotrophic ... kindly check again ...

2Thank You

ANSWER

We should not eat hurriedly. Give reason

Posted by Krishna Mohan Lad Lad 1 year, 3 months ago

CBSE > Class 07 > Science

2 answers

Prem Prakash 1 year, 3 months ago

because if we eat the food hurriedly the food may can enter in wind pipe(Pharynx). Actually the wind pipe runs adjacent to the food pipe(Oesophagus) but in the throat, air and food share a common passage. So if we eat hurriedly the food get enter in wind pipe. So stopping this action the hiccups or cough will start.

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Sohan Barik 1 year, 3 months ago

Because they are not make there own food. Directly or indirectly they are decent on other animals or plants

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ANSWER

Make a points on waterclock

Posted by Vishakha Daware 1 year, 3 months ago

CBSE > Class 07 > Science

1 answers

Ashwin Kumar 1 year, 3 months ago

1Thank You

ANSWER

Long questions and answers Explain four factors on which the climate of a place depends.

Posted by Samridhi Roy 1 year, 3 months ago

CBSE > Class 07 > Science

0 answers

ANSWER

Define the term change

Posted by Maanvi Raghuwanshi 1 year, 3 months ago

CBSE > Class 07 > Science

2 answers

Kartik Thakur 1 year, 3 months ago

A thing looking different from it's first natural appearance

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Ashwin Kumar 1 year, 3 months ago

Transfer of one thing to another is known as change

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ANSWER

Name all the elements present in the following compounds :- SO² , PbCl², Ba(OH)² ,LiF

Posted by Bhuvi Gurnani 1 year, 4 months ago

CBSE > Class 07 > Science

0 answers

ANSWER

Where does radiation takes place

Posted by Kaviraj Gamit 1 year, 4 months ago

CBSE > Class 07 > Science

3 answers

Kartik Thakur 1 year, 3 months ago

Heat of sun rays transfer to the earth

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Ashwin Kumar 1 year, 3 months ago

It takes place in earth and universe

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Shivam Kumar 1 year, 4 months ago

Through a vacuum or transparent medium which can be either solid or liquid.

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Can we say that insectivorous plants are partial heterotrophs? Explain

Posted by Ganga S 1 year, 4 months ago

CBSE > Class 07 > Science

2 answers

Atharv Singh 1 year, 3 months ago

Yes we can see that insectivorous plants are passion heterotrophs because they have chlorophyll but did grow in nitrogen deficient soil to fulfill their need they eat insects

1Thank You

Lakshita Gupta 1 year, 4 months ago

Yes.

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ANSWER

What is the answer for activity 4.10. Chapter 4

Posted by Mahi Mithra G. S.. 1 year, 4 months ago

CBSE > Class 07 > Science

0 answers

ANSWER

Can we say that insectivorous plants are partial heterotrophs

Posted by Ganga S 1 year, 4 months ago

CBSE > Class 07 > Science

3 answers

Deepisha Vijayan 1 year, 3 months ago

Yes

0Thank You

Ganga S 1 year, 4 months ago

Can u explain that

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Shaurya Patil 1 year, 4 months ago

Yes

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ANSWER

LPG is stored in a cylinder as a liquid when you burn it in the store it is in the gaseous form what kind of change occur during the use of LPG

Posted by Yuvraj Singh 1 year, 4 months ago

CBSE > Class 07 > Science

2 answers

Spandana Priyadarshini 1 year, 3 months ago

It includes both chemical and physical change as when lpj comes out of the cylinder , State is only changed and no New substance is formed while when we burn , Co2 is produced hence chemical change

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Sai Suman 1 year, 4 months ago

Huijs

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ANSWER

How do the land breeze and sea breeze make the climate in coastal areas moderate (nether too hot nor too cold)

Posted by 11-Adithya Anand 1 year, 4 months ago

CBSE > Class 07 > Science

3 answers

Mahi Mithra G. S.. 1 year, 4 months ago

I don

0Thank You

Yuvraj Singh 1 year, 4 months ago

Jshd

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11-Adithya Anand 1 year, 4 months ago

I don't no

3Thank You

ANSWER

Three liquids are given to you. one is hydrochloric acid another is sodium hydroxide and third is sugar solution. How will you identify them ? You have only turmeric indicator

Posted by Rima John 1 year, 4 months ago

CBSE > Class 07 > Science

1 answers

Priyanka Shah 1 year, 4 months ago

If turmeric indicator colour changes to red colour, then it is a sodium hydroxide solution to hydrochloric acid and sugar solution. Then by using yellow turmeric indicator again, we can able to distinguish between acid and neutral solution.

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ANSWER

Why we don't use labouratory thermometer as like a clinical thermometer

Posted by Rajdeep Mahanta 1 year, 4 months ago

CBSE > Class 07 > Science

3 answers

Sahil Bante 1 year, 3 months ago

Because both of them made up of mercury

0Thank You

Roshni Sahoo 1 year, 4 months ago

We don't use labouratory thermometer as like a clinical thermometer because it range start in -10.celcious

2Thank You

Tanishka Sagar 1 year, 4 months ago

A laboratory thermometer can't be used to measure body temperature as it does not have a kink. The kink, in a clinical thermometer, prevents mercury levels from falling on its own so that temperature can be read even when the thermometer is no longer in contact with our body.

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ANSWER

How does light 💡 travel

Posted by Saili Gawande 1 year, 4 months ago

CBSE > Class 07 > Science

4 answers

Shyam Ladli Vaishnavi 11 months, 2 weeks ago

Light always travel in a straight line this property of light is known as rectilinear propagation of light

0Thank You

Sohan Singh 1 year, 2 months ago

Straight line

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Gauri Tyagi 1 year, 3 months ago

Straight line

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Tanishka Sagar 1 year, 4 months ago

Light always travels in a straight line. It does not bend while travelling. It follows the shortest path between the starting point and the endpoint, which is a straight line.

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ANSWER

What is the acid

Posted by Somya Kushwaha 1 year, 4 months ago

CBSE > Class 07 > Science