Environmental Science MCQs

✅ The correct answer is option B.
At its initial formation, the Earth’s first atmosphere was composed primarily of the light elements hydrogen and helium.

✅ The correct answer is option B.
Secondary productivity is mobile in nature.

✅ The correct answer is option A.
Temperature determine the kind (wavelength) and amount of radiation that an object emits.

✅ The correct answer is option A.
During the process of photosynthesis, light penetrates the cell and passes into the chloroplast. The light energy is intercepted by chlorophyll molecules on the granal stacks. Some of the light energy is converted to chemical energy. During this process, a phosphate is added to a molecule to cause the formation of ATP.

✅ The correct answer is option C.
Biotic components are the living things that shape an ecosystem. Examples of biotic components include animals, plants, fungi, and bacteria. Abiotic components are non-living components that influence an ecosystem. Examples of abiotic factors are temperature, air currents, water, and minerals.

✅ The correct answer is option C.
Air is composed of gases, water vapours and many of the dust particles.

✅ The correct answer is option A.
Hippocrates mentioned air pollution in 400 BC.

✅ The correct answer is option B.
Because water boils at a lower temperature at higher elevations, foods that are prepared by boiling or simmering will cook at a lower temperature, and it will take longer to cook. High altitude areas are also prone to low humidity, which can cause the moisture in foods to evaporate more quickly during cooking.

✅ The correct answer is option C.
Most harmful environmental pollutants are non-biodegradable chemicals.

✅ The correct answer is option B.
The pyramid of biomass may be “inverted”. For example, in a pond ecosystem, the standing crop of phytoplankton, the major producers, at any given point will be lower than the mass of the heterotrophs, such as fish and insects.