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
50 Score: 0 Attempted: 0/50 Subscribe 1. What does SETI stand for? (A) Search for Earth Terrestrial Investigations (B) Search for Extraterrestrial Intelligence (C) Science of Extraterrestrial Information (D) Space Exploration and Technology Institute 2. The primary goal of SETI is to: (A) Explore the Moon (B) Detect signs of intelligent life beyond Earth (C) … Read more
50 Score: 0 Attempted: 0/50 Subscribe 1. The habitable zone is the region around a star where: (A) Planets can form rings (B) Liquid water can exist on a planet’s surface (C) All planets have moons (D) Atmospheres always form 2. The habitable zone of a star mainly depends on: (A) Star’s mass and luminosity … Read more
50 Score: 0 Attempted: 0/50 Subscribe 1. What are extremophiles? (A) Organisms that live only in mild environments (B) Organisms adapted to survive extreme environmental conditions (C) Organisms that require oxygen to survive (D) Organisms that can only live in oceans 2. Thermophiles are extremophiles that thrive in: (A) Extremely cold environments (B) Extremely hot … Read more
Score: 0 Attempted: 0/50 Subscribe 1. What are biosignatures? (A) Geological formations caused by erosion (B) Chemical, physical, or biological indicators of life (C) Artificial satellites orbiting a planet (D) Evidence of volcanic activity 2. Which gas is a strong biosignature when found with methane? (A) Oxygen (O₂) (B) Nitrogen (N₂) (C) Carbon monoxide (CO) … Read more
50 Score: 0 Attempted: 0/50 Subscribe 1. X-ray astronomy studies which type of radiation? (A) Radio waves (B) Ultraviolet (C) X-rays (D) Infrared 2. The wavelength range of X-rays is approximately: (A) 10–400 nm (B) 0.01–10 nm (C) 700–1000 nm (D) 1–10 mm 3. Earth’s atmosphere blocks X-rays, so observations must be made from: (A) … Read more
50 Score: 0 Attempted: 0/50 Subscribe 1. Ultraviolet astronomy studies which type of radiation? (A) Infrared (B) Ultraviolet (C) X-rays (D) Radio waves 2. Ultraviolet (UV) radiation has wavelengths shorter than: (A) Visible light (B) Infrared light (C) X-rays (D) Radio waves 3. The wavelength range of ultraviolet astronomy is approximately: (A) 10–400 nm (B) … Read more