Page 100 - Active Science 5 Ebook and Activity

Activity 8.1

Collect leaves from different places like from Factual Study

school, from the garden, roadside, from indoor Every day 70 million tons of carbon
plants and from industrial sites and note dioxide is released into the environment.
the difference between the accumulated on According to the records, out of the
past 12 years, 10 years have been the
collected leaves by wiping the dust with your hottest—majorly. The 10 hottest years

fingers. Also discuss the reason behind it in were between 1997 and 2008.
class.

Water Pollution

The addition of harmful substances in water
which makes water unfit for drinking is
called water pollution. Disposal of waste
from industries and sewage pipelines into

water bodies are the major reasons of water
pollution.

In villages, washing clothes and bathing
animals near lakes and rivers pollute

water. The dirt and soap from these
activities directly go into the water bodies
and makes water unfit for drinking.

The water of seas and oceans get polluted
due to the oil spillage from oil transporting

ships. The oil harms the lives of aquatic
plants and animals because it forms a layer
above water, blocking all oxygen supply.

Harmful Effects of Water Pollution Water Pollution
1. Water pollution makes water unfit for

drinking. Factual Study
In July 1979, one stormy evening, two
2. Waste from sewage and industries full supertankers collided off the coast of
contains germs that mix into water Tobago in the Caribbean Sea, precipitating
bodies and cause diseases like the largest ship-sourced oil spill in history.

diarrhoea, cholera, typhoid. Crippled by the accident, both vessels began

to leak their crude oil and caught fire. One
of the tankers exploded 300 nautical miles
offshore, killing 26 crew members.

100 Active Science-5