Environmental Science - Study Mode

[#346] Noise is _______________
Correct Answer

(C) Undesirable and unwanted sound

Explanation

Solution: Noise is disordered sound. Music and noise are both mixtures of sound waves of different frequencies. The component frequencies of music are discrete (separable) and rational (their ratios form simple fractions) with a discernible dominant frequency.

[#347] What is UNCED?
Correct Answer

(C) United Nations Conference on Environment and Development

Explanation

Solution: The United Nations Conference on Environment and Development (UNCED), also known as the Rio de Janeiro Earth Summit, the Rio Summit, the Rio Conference, and the Earth Summit (Portuguese: ECO92), was a major United Nations conference held in Rio de Janeiro from 3 to 14 June in 1992.

[#348] What is the most important factor for the success of animal population?
Correct Answer

(B) Adaptability

Explanation

Solution: The process by which a species becomes fit to its survival in the environment is called adaptability. When the environmental factors change the organism has to adapt to its surrounding by changing its temperature or metabolism over a period of time, Hence adaptability is the result of natural selection.

[#349] _________ is the element used to produce nuclear energy
Correct Answer

(C) Uranium

Explanation

Solution: Uranium is the fuel most widely used to produce nuclear energy. That's because uranium atoms split apart relatively easily. Uranium is also a very common element, found in rocks all over the world.

[#350] Carbon dioxide is called greenhouse gas because it is
Correct Answer

(A) Transparent to sunlight but traps heat

Explanation

Solution: Those gas molecules in the Earth's atmosphere with three or more atoms are called "greenhouse gases" because they can capture outgoing infrared energy from the Earth, thereby warming the planet. The greenhouse gases include water vapor with three atoms (H2O), ozone (O3), carbon dioxide (CO2), and methane (CH4).