Environmental Science MCQ Questions and answers | EVS MCQ

The Sardar Sarovar Dam is a gravity dam on the Narmada river near Navagam, Gujarat in India. Four Indian states, Gujarat, Madhya Pradesh, Maharastra and Rajasthan, receive water and electricity supplied from the dam. The foundation stone of the project was laid out by Prime Minister Jawaharlal Nehru on 5 April 1961.

The park is home to a number of species of endangered mammals, including the snow leopard. Hemis National Park is India's protected area inside the Palearctic ecozone, outside the Changthang Wildlife Sanctuary northeast of Hemis, and the proposed Tso Lhamo Cold Desert Conservation Area in North Sikkim.

The Chernobyl disaster was a nuclear accident that occurred on 26 April 1986 at the No. 4 nuclear reactor in the Chernobyl Nuclear Power Plant, near the city of Pripyat in the north of the Ukrainian Soviet Socialist Republic.[1][2] It is considered the worst nuclear disaster in history and is one of only two nuclear energy disasters rated at seven—the maximum severity—on the International Nuclear Event Scale, the other being the 2011 Fukushima Daiichi nuclear disaster in Japan.

Higher the trophic level an organism occupies in the food chain higher will be the accumulation of non-biodegradable pesticide residues. This phenomenon is called as biomagnification.

The main energy source for the environment is Solar energy. Solar power harvests the energy of the sun through using collector panels to create conditions that can then be turned into a kind of power.

Soil chemistry is considered an edaphic factor.

Trichoderma harzianum has proved a useful microorganism for bioremediation of contaminated soils.

Biomagnification, also known as bioamplification or biological magnification, is any concentration of a toxin, such as pesticides, in the tissues of tolerant organisms at successively higher levels in a food chain.

Food webs consist of many interconnected food chains and are more realistic representation of consumption relationships in ecosystems.

BOD stands for Biological Oxygen Demand. It is the amount of dissolved oxygen required by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.