Olympiad Test Level 2: Environment and its Conservation - 2 - Class 4 MCQ

Metal can is non -biodegradable, as it will take decades to break it down. 

The correct composition of atmospheric air is: Nitrogen- 78%, Oxygen- 21%, Others (Argon, Carbon dioxide)- 1%.

Toxic chemicals are absorbed by food grown in the soil. Thus, they are harmful to us.

Greenhouse effect are caused by greenhouse gases which trap the heat from the Sun and rises the Earth’s temperature.

The most striking evidence of global warming is melting of ice glaciers, which impact various species natural habitat.

Implementation of laws is the step taken by the government for conservation of natural resources. As will help control the usage of resources and avoid the unnecessary use of natural resources.

If there is no carbondioxide on the earth’s atmosphere, the temperature of Earth’s surface would reduce i.e. less than the present.

If we have to preserve the resources we have to save them for future generations. Because of increasing population, the rate of using natural resources is also increasing, hence we have to conserve them for our future generations.

Latitude is the most significant climatic controls, as it effects the amount of solar radiation which reaches the Earth’s surface.

Air pollution causes global warming. Water pollution disrupts flora and fauna as it destroys their habitat due to release of hazardous wastes in water. Soil pollution reduces fertility of soil.