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Change in which only physical properties of a substance change and no new substance is formed is called Physical Change.
Folding of a paper sheet: A paper can be folded or unfolded, and hence it is an example of physical change. Moreover, no new substance is formed in this process, so it is a physical change.
Tearing of paper sheet: Even after being torn in very small pieces; each piece is a piece of paper. Since no new substance is formed in this process, so it is a physical change.

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What is lymph?

Posted by Shreya Mukherjee 7 years, 3 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 7 years, 3 months ago

Lymph is a clear fluid sometimes white in colour comprises of white blood cells mainly lymphocytes. These cells also attack bacteria entering the cells. Lymph also contains the fluid from the intestine containing proteins and fats. This extracellular fluid is divided into interstitial fluid and plasma.

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How is red cabbage used as an indicator?

Posted by Utpala Kaur 7 years, 3 months ago

CBSE > Class 07 > Science

1 answers

? Shubhangi ? ? Dubey ? 7 years, 3 months ago

To make the red cabbage indicator, boil the red cabbage. And test it with acid and base. It turns pink with acid and green with base

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A vertical section through different layers of the

Posted by Anu Ragavi 7 years, 3 months ago

CBSE > Class 07 > Science

1 answers

Shatakshi Mishra 7 years, 3 months ago

Soil profile

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chkccsaeu

Posted by Anu Ragavi 7 years, 3 months ago

CBSE > Class 07 > Science

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Why's the fish die when taken out of the water

Posted by Prince Pal 7 years, 3 months ago

CBSE > Class 07 > Science

1 answers

Real Experts 7 years, 3 months ago

Beacause their gills do not take water in it so the fish die

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Give five example of slow change.

Posted by Anju Maurya 7 years, 3 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 7 years, 3 months ago

Slow changes take place very slowly and may take hours, days or months to complete.
Examples for slow changes: Rusting of iron, Germination of seed, curdling of milk, Drying of Clothes, Growth of a human being etc.

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What is the process of photosyntheos

Posted by Subham Kumar 7 years, 3 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 7 years, 3 months ago

The process of making of food by green plants in the presence of sunlight and chlorophyll is known as photosynthesis. Photosynthesis is the combination of two words- Photo + Synthesis. ‘Photo’ means light and ‘Synthesis’ means to make.

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Name the device used for measuring the temperature of human body?

Posted by Sagar Ashok 7 years, 3 months ago

CBSE > Class 07 > Science

7 answers

Srividya Sokki 7 years, 3 months ago

Clinical thermometer

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Daksh Tripathi 7 years, 3 months ago

CLINICAL THERMOMETER

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Tushar Kumar 7 years, 3 months ago

Clinical Thermometer

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Vandna Singh? 7 years, 3 months ago

Clinical termometer.

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Real Experts 7 years, 3 months ago

Clinical thermometer

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Amrendra Bahubali 7 years, 3 months ago

clinical thermometer

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Akash Kumar 7 years, 3 months ago

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Give one example of periodic motion

Posted by Aditya Kumar 7 years, 3 months ago

CBSE > Class 07 > Science

2 answers

Daksh Tripathi 7 years, 3 months ago

Pendulum

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Yogita Ingle 7 years, 3 months ago

When an object repeats its motion after every fixed interval of time, the motion of the object is called periodic motion. In many wall clocks pendulum is used even today. A device having a string suspended with a fixed point with a bob at bottom is called pendulum.

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What is periodic motion give one example

Posted by Aditya Kumar 7 years, 3 months ago

CBSE > Class 07 > Science

1 answers

Aditya Kumar 7 years, 3 months ago

What is the ans

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Humus

Posted by Sagar Ashok 7 years, 3 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 7 years, 3 months ago

The organic constituent of soil, usually formed by the decomposition of plants and leaves. In most soil, the humus ranges from 2-10 percent, whereas it is up to 90 percent in peat bog.
The humus content is often determined after calculating the soil’s water content. The weighed dry soil sample is heated strongly so that the humus burns away. The loss of mass is the mass of humus that was burnt away.

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Name two organic acids

Posted by Ayan Hasan 7 years, 3 months ago

CBSE > Class 07 > Science