27 March : Daily Current Affairs Quiz

Answer: Option B - To create a 3D map of the universe and investigate dark matter and dark energy

Explanation:

• The Euclid Observatory, launched by the European Space Agency (ESA), aims to study dark matter and dark energy by mapping billions of galaxies across 10 billion years of cosmic history.
• It operates from the second Lagrange point (L2) and uses advanced instruments to analyze the large-scale structure of the universe.
• Findings help scientists understand cosmic expansion and the nature of dark energy.

Answer: Option B - Collision of charged solar particles with Earth's atmospheric gases, exciting oxygen and nitrogen molecules

Explanation:

• The Northern Lights (Aurora Borealis) occur when charged particles from the Sun, carried by the solar wind, interact with Earth's magnetic field and collide with atmospheric gases.
• These collisions excite oxygen and nitrogen molecules, causing them to emit light in various colors, such as green, red, and purple.

This phenomenon is most visible near the polar regions due to the Earth's magnetic field directing the particles there.

Answer: Option B - They produce heavy elements, distribute them across space, and trigger star formation.

Explanation:

• Supernovae are powerful stellar explosions that create and disperse heavy elements like iron, gold, and uranium, essential for planet formation.
• Their shockwaves compress surrounding gas clouds, triggering the birth of new stars.
• Additionally, supernovae enrich the interstellar medium with elements necessary for life and influence galaxy evolution, making them crucial in the cosmic cycle of matter and energy.

Answer: Option A - The uniform cosmic microwave background radiation, the redshift of distant galaxies, and the abundance of light elements

Explanation:

• The Big Bang Theory is supported by the cosmic microwave background radiation, which is the remnant heat from the early universe.
• The redshift of distant galaxies confirms the universe is expanding, consistent with an initial explosion.
• Additionally, the abundance of light elements like hydrogen and helium matches predictions from early nucleosynthesis, further validating the theory.

Answer: Option A - Romania, Bulgaria, Georgia

Explanation:

• The Black Sea is bordered by six countries: Romania, Bulgaria, Turkey, Georgia, Russia, and Ukraine.
• Among the given options, only Romania, Bulgaria, and Georgia correctly border the Black Sea.
• Poland, Hungary, and Slovakia are landlocked or border other seas.
• Serbia, Albania, and North Macedonia are located in the Balkans but do not touch the Black Sea.
• Austria, Czech Republic, and Moldova are landlocked countries without a Black Sea coastline.