Let us Explore (Page 62) Observe Fig. 3.15 (see textbook, page 61). Describe the effects they may have on people Class 7

Let us Explore (Page 62) Observe Fig. 3.15 (see textbook, page 61). Describe the effects they may have on people, plants, animals and economic life. Class 7

Observe Fig. 3.15 (see textbook, page 61). Describe the effects they may have on people, plants, animals and economic life. Class 7

Answer:

Question 2.

In groups of four or five, identify in each of the above disasters the part of natural causes and the part of human causes. Compare your conclusions.

Answer:

The natural and human causes of the disasters we have discussed: forest fires, cyclones, floods, and landslides.

1. Forest Fires:

1. Natural Causes: Lightning strikes can start fires in dry areas. Also, dry weather and high temperatures can make it easier for fires to spread.
2. Human Causes: People sometimes start fires accidentally, like when camping or through discarded cigarettes. Land clearing for agriculture can also lead to forest fires.

2. Cyclones:

1. Natural Causes: Cyclones form due to low atmospheric pressure over warm ocean waters, which is a natural weather phenomenon.
2. Human Causes: While cyclones themselves are natural, human activities like climate change can increase their frequency and intensity by warming the oceans.

3. Floods:

1. Natural Causes: Heavy rainfall can lead to floods, especially if the ground is already saturated or if there are storms.
2. Human Causes: Poor urban planning, such as building on floodplains or blocking waterways with construction, can worsen flooding.

4. Landslides:

1. Natural Causes: Heavy rain, earthquakes, or volcanic activity can trigger landslides in hilly areas.
2. Human Causes: Deforestation and construction on slopes can destabilize the soil and increase the risk of landslides.