Importance of Water Multiple Choice Questions and Answers 21 PDF Download
Importance of water multiple choice questions, learn grade 7 science online test prep 21 for elementary school online courses, distance learning for exam prep. Practice crops and irrigation multiple choice questions (MCQs), importance of water quiz questions and answers for science class for 7th grade assessment test.
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MCQs on Importance of Water Worksheets 21 Quiz PDF Download
MCQ: Water supply through pipelines and tube wells to farm is known as
MCQ: Waste water from houses, buildings and other areas is called
- waste water
- aquarium waste
MCQ: Chlorine helps
- to kill bacteria
- in heating water
- in cooling water
- to evaporate water
MCQ: Remains of salt over soil after evaporation of water is known as
- water logging
MCQ: Litters such as plastic bags are harmful for