u930973931_answers

50 Score: 0 Attempted: 0/50 Subscribe 1. What is a protoplanetary disk? (A) A disk of gas and dust around a young star (B) A galaxy’s spiral arm (C) A black hole’s accretion disk (D) A belt of asteroids 2. Protoplanetary disks are the birthplace of: (A) Galaxies (B) Planets (C) Black holes (D) Stars … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. What are organic molecules in space primarily composed of? (A) Carbon and hydrogen (B) Iron and nickel (C) Helium and neon (D) Oxygen and nitrogen 2. Which of the following is a simple organic molecule detected in space? (A) Methane (CH₄) (B) Sodium chloride (NaCl) (C) Ammonia (NH₃) … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. What are molecular clouds primarily composed of? (A) Carbon dioxide (B) Hydrogen molecules (H₂) (C) Oxygen gas (D) Helium 2. Which molecules are commonly used to trace molecular clouds? (A) CO (Carbon monoxide) (B) N₂ (Nitrogen) (C) O₂ (Oxygen) (D) CH₄ (Methane) 3. Molecular clouds are also known … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. What is the interstellar medium (ISM)? (A) The matter between stars in a galaxy (B) The dark energy driving expansion (C) The cosmic background radiation (D) The gravitational field of a black hole 2. What is the primary composition of the ISM? (A) Hydrogen and helium gas (B) … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. What does the term “Universe’s Fate” generally refer to? (A) The age of the universe (B) The ultimate future evolution and end of the universe (C) The origin of galaxies (D) The study of planets 2. Which scientific field studies the fate of the universe? (A) Biology (B) … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. What does the Inflation Theory primarily explain in cosmology? (A) The end of the universe (B) The rapid expansion of the universe in its earliest moments (C) The creation of stars and galaxies (D) The slowing down of cosmic expansion 2. Who first proposed the Inflation Theory? (A) … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. What is dark matter? (A) Matter that emits visible light (B) Matter that interacts only through gravity and possibly weak forces (C) Ordinary matter in stars and planets (D) Black holes and neutron stars only 2. What percentage of the universe’s total mass-energy is thought to be dark … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. What is dark energy? (A) A form of visible matter (B) A mysterious force causing the accelerated expansion of the universe (C) Radiation emitted by black holes (D) Energy inside stars 2. Approximately what percentage of the universe is dark energy? (A) 5% (B) 27% (C) 68% (D) … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. What is the Cosmic Microwave Background (CMB)? (A) Radiation left over from the Big Bang (B) Radiation from black holes (C) Light from distant galaxies (D) Radiation from stars 2. In which wavelength range is the CMB observed today? (A) Infrared (B) Visible light (C) Microwave (D) X-ray … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. The Big Bang Theory explains: (A) The origin of stars only (B) The origin of the solar system (C) The origin and expansion of the universe (D) The motion of galaxies only 2. Approximately how old is the universe according to the Big Bang Theory? (A) 4.5 billion … Read more