Exercise
NCERT Science Solutions for Exercise
Simple step-by-step solutions to Exercise questions of Light from Science Textbook of Competency Based Questions for Class VIII. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from Exercise with Hints & Solutions
Shanti lives in a slum area on the borders of a metro rail track. There has been a marked increase in dengue and malaria cases in the slum. Shanti is worried because ten cases of dengue and fifteen cases of malaria were reported during the last month. Today a team of representatives, from the department of health, has talked to slum dwellers. They also met Shanti and asked her about unhealthy conditions in the slum. The health department is of the view that stagnant water in the slum is the real cause of dengue and malaria. They have asked the people to clean the slum and to remove the stagnant water. Shanti was unable to understand this.
How can we, as students, help the slum dwellers?
State the differences between:
Pasteurization and sterilization.
Distinguish between the following:
Communicable and non-communicable diseases.
What is the difference between communicable and non-communicable diseases?
What are the differences between communicable and non-communicable diseases?
With regard to the transmission of the human immunodeficiency Virus (HIV), which one of the following statements is not correct?
Name the three type of bacteria shown in this figure.
