WBSED - 7 - Science :: Role of matter in building of environment
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[Author - Anu Nived]
Objective: To learn about presence of elements in our body and in nature
Subtopics to be covered:
- Proportion of all elements in human body
- Significance of elements, compounds in human body
- Acidic, basic food substances
- Chemicals found in nature - flowers, fruits, vegetables and their properties
- Introduction to polymer and plastics - manmade materials
- Soap, Detergents, Fertilizers, Pesticides
Learning Outcome:
- Students can name items that fall in above explained categories
[Author - Kripa S]
http://www.wbsed.gov.in/wbsed/readwrite/etextbook/General%20Science%20Class%20VII.pdf#page=111 (Bengali Medium)
[Author - Malabika Sarker]
https://drive.google.com/open?id=0B4m07xnDF8JpN0xNajhjNXdyVU0 (man made materials)
[Author - Anu Nived]
https://s-media-cache-ak0.pinimg.com/736x/42/78/6b/42786b4a8d6c7ae6626989000d1215b6.jpg (acidic and basic food)
http://2.bp.blogspot.com/-viI76AHxleg/T1Zb5jQNy-I/AAAAAAAACIM/FoCpsuPNmJg/s1600/fertilizers.jpg (fertilizers)
https://thetruthaboutcancer.com/wp-content/uploads/pesticide-danger-cancer.jpg (pesticides)
[Author - Kripa S]
1. Ask the students to list one complete meal that they eat regularly. Ask them to state the ingredients used to prepare the meal. Which of those ingredients came from plants? Classify the ingredients according to the part of a plant that it comes from.
2. Ask a student to list out their one complete meal. Classify parts of the meal according to nutrients: proteins, carbohydrates and fat. Ask students to give a few more examples of food containing each of the nutrients.
[Author - Arnab Das]
https://drive.google.com/open?id=0BzNF2YyqQxJ-TVVjTl94VnM5YjA
| Term' | Transliterated Term | Translated Term | |
| Organic | অর্গানিক | জৈব | |
| Inorganic | ইনঅর্গানিক | অজৈব | |
| Element | এলিমেন্ট | মৌল | |
| Metal | মেটাল | ধাতু | |
| Carbohydrate | কার্বোহাইড্রেট | শর্করা | |
| Acid | অ্যাসিড | অম্ল | |
| Base | বেস | ক্ষারক | |
| Alkali | অ্যাল্কালি | ক্ষার | |
| Indicator | ইন্ডিকেটর | নির্দেশক | |
| Neutralization Reaction | নিউট্রালাইজেশন রিঅ্যাকশন | প্রশমন বিক্রিয়া | |
| Dissociation | ডিসসোশিয়েসন | বিয়োজন | |
| Solution | সলিউশন | দ্রবণ | |
| Crystal | ক্রিস্টাল | কেলাস | |
| Sea Salt | সী সল্ট | সৈন্ধব লবণ | |
| Rock Salt | রক সল্ট | বীট লবণ | |
| Ionization | আয়োনাইজেশন | আয়নিত | |
| Excretion | এক্সক্রিশন | রেচন | |
| Synthetic | সিন্থেটিক | সংশ্লেষিত | |
| Polymer | পলিমার | বৃহৎশৃংখল যৌগ | |
| Pigment | পিগমেন্ট | রঞ্জক | |
| Biodegradable | বায়োডিগ্রেডেবল | জৈব ভঙ্গুর | |
| Non | biodegradable | নন বায়োডিগ্রেডেবল | জৈব অভঙ্গুর |
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