MHSB - 7 - Science :: Properties of Natural Resources

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MSCERT-Science-Grade 7

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[Author - Kripa S]


Objective: To learn the properties of air, water, soil

Subtopics to be covered:

- Effect of pressure of air on water

- Condensation of water

- Density of water, anomalous behaviour of water

- Types of soil, Uses of soil

Learning Outcome:

- Students know the properties of air, water and soil

- They know about anomalous behaviour of water, density of water

- They know about soil testing, soil structure and uses of soil


[Author - Kripa S]


1. Take a little soil. Break the clumps with your hand to powder it. Now take a glass tumbler, three quarters filled with water, and then add a handful of soil to it. Stir it well with a stick to dissolve the soil. Now let it stand undisturbed for some time. Observe the layers of soil and take notes.

2. Make a group of five students and discuss the uses of water in your daily life. Write down the uses. Classify the above uses of water in three

groups, uses in a house or family, for agricultural purposes and others.

3. Form groups of 4 to 5 students and discuss the following topics in each group. Prepare points and share. The topics to be discussed are :

a) What will happen if rainfall this year is less than last year?

b) What would happen if there was no rainfall for five years?

c) What could be the possible reasons for water scarcity in a particular place?

d) What problems can arise due to water scarcity in a particular place?


Term' Transliterated Term Translated Term
Mass मास            वस्तुमान 
Weight वेट वजन
Atmospheric pressure ऍटमॉस्फेरिक प्रेशर वातावरणाचा दाब
Barometer बॅरोमीटर वायुदाबमापक
Scattering of light स्कॅटरिंग ऑफ लाईट प्रकाशाचे विकिरण
Temperature regulation टेम्परेचर रेग्युलेशन तापमान नियंत्रण
Transmission of sound ट्रान्समिशन ऑफ साऊंड ध्वनिप्रसारण
Anomalous behavious ऍनोमॅलस बिहेवियर असंगत वर्तन
Texture टॆक्सचर पोत
Sandy soil सँडी सॉईल  रेताड मृदा
Silt soil सिल्ट सॉईल  पोयटा मृदा
Clay soil क्ले सॉईल  चिकण मृदा
China clay चायना क्ले चिनी मृदा 
Kaolin केओलिन केओलिन   
Solute सोल्युट द्राव्य 
Solvent सॉल्व्हन्ट  द्रावक 
Solution  सोल्यूशन  द्रावण
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