Basic Science GK Quiz for Competitive Exams

A star's colour is related to its surface temperature. The shorter the wavelength of light emitted by a star, the hotter it is. Blue or blue-white light with shorter wavelengths is the hottest. Cooler colours have longer wavelengths, such as red or red-brown.

Some celestial bodies do not have their heat and light. They are lit by the light of the stars. Such bodies are called planets.

The correct answer is Reptiles. Non-chordates are animals without a notochord or backbone whereas chordates have the same.

Roquefortine C has been found mainly in blue cheese and blue cheese products. In a survey of 16 blue cheese samples from Denmark, Finland, Germany, France, Britain, Italy and Canada, all samples contained this mycotoxin at levels up to 6800 ng g⁻¹ (average 950 ng kg⁻¹).

The water-soluble vitamins include ascorbic acid (vitamin C), thiamin, riboflavin, niacin, vitamin B₆ (pyridoxine, pyridoxal, and pyridoxamine), folacin, vitamin B₁₂, biotin, and pantothenic acid.

Through the conductor, electric current can flow easily or electrons can move freely from one atom to another. So, a blade can be used to complete an electric circuit if one runs out of connecting wire.

The primary greenhouse gases in Earth's atmosphere are carbon dioxide, methane, water vapour and ozone.

The statement that best describes the nature of science is statement: C. Scientific ideas change over time as new information is discovered. This is 100% true and it is why we, as humans, continue to research concepts and build upon them day in and out.

The main greenhouse gases whose concentrations are rising are carbon dioxide, methane, nitrous oxide, hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs) and ozone in the lower atmosphere.

Venus is sometimes called Earth's twin because Venus and Earth are almost the same size, have about the same mass (they weigh about the same), and have a very similar composition (are made of the same material). They are also neighboring planets.