Cosmic Quest: Space Basics

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A beginner to intermediate space trivia

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Piyush Joshi

India

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Cosmic Quest: Space Basics


Froggy Jumps Cosmic Quest: Space BasicsOnline version A beginner to intermediate space trivia by Piyush Joshi 1 What is the smallest planet in our Solar System by orbit count of the Sun in our system? a Mars b Venus c Mercury 2 Which planet has the most moons in our Solar System as of recent surveys? a Jupiter b Uranus c Saturn 3 What do we call a rock from space that reaches Earth's surface? a asteroid b meteorite c comet 4 Which layer of Earth's atmosphere do most weather events occur in? a Troposphere b Stratosphere c Mesosphere 5 What is the primary fuel for the Sun’s energy production? a Hydrogen fusion b Hydrogen fission c Helium fusion 6 Which space telescope has provided stunning deep-space images beyond our atmosphere? a James Webb Space Telescope b Chandra X-ray Observatory c Hubble Space Telescope 7 Which planet is known for its prominent ring system? a Jupiter b Neptune c Saturn 8 What is a galaxy ball of stars held together by gravity called? a Galaxy b Star cluster c Nebula 9 Which dwarf planet resides in the Kuiper Belt and was once considered a planet? a Pluto b Eris c Haumea 10 Which mission first landed humans on the Moon? a Apollo 11 b Sputnik 1 c Viking 1 11 What is a black hole? a A dense star with no gravity b A region where gravity prevents anything from escaping, bounded by an event horizon c A cloud of dark matter with no mass 12 What marks the boundary around a black hole beyond which nothing can escape? a Event horizon b Photon sphere c Singularity 13 What is Hawking radiation? a Radiation from cosmic background glow b Theoretical radiation emitted by black holes due to quantum effects c Radiation emitted by stars during supernova 14 What is the singularity in a black hole? a A rotating ring around the hole b A smooth spacetime region c A point where density becomes infinite at the center 15 Which theory describes the origin of the universe from a hot dense state? a Steady State theory b String theory c The Big Bang theory 16 Two strong evidences for black holes are X-ray binaries and gravitational waves. True or False? a True b False c Only gravitational waves, not X-rays 17 What’s the difference between stellar-mass and supermassive black holes? a All black holes have the same mass b Stellar-mass are larger than supermassive c Stellar-mass form from collapsed stars; supermassive are millions to billions solar masses 18 What does spacetime curvature around mass cause? a Electromagnetic radiation only b Gravitational effects that bend light and affect motion c Quantum tunneling 19 Approximately how old is the universe according to current estimates? a About 13.8 billion years b About 3.8 billion years c About 1.38 billion years 20 What is the information paradox related to black holes? a Whether black holes can move faster than light b Whether black holes can create matter c Question of whether information swallowed by a black hole is lost 21 What is mass in physics? a The amount of matter in an object b The weight of an object c The force needed to move an object 22 Which unit is standard for mass? a Kilogram (kg) b Newton (N) c Meter (m) 23 What tool is commonly used to measure mass without changing it? a A balance scale b A spring scale c A ruler 24 Weight depends on gravity; mass does not. True or false? a False b True c Depends on the object 25 Which equation relates mass, force, and acceleration? a E = mc^2 b W = Fd c F = ma 26 What is inertial mass a measure of? a Resistance to changes in motion b Volume of the object c Amount of energy 27 Which two masses are equal if the objects are in the same gravity? a Mass and density b Gravitational mass and inertial mass c Mass and volume 28 If mass doubles while acceleration stays the same, the force needed ... a Halves b Remains the same c Doubles 29 Density is mass per unit what? a Area b Volume c Time 30 Mass–energy equivalence is expressed by which formula? a E = mc^2 b F = ma^2 c pV = nRT 31 What is Newton's law of universal gravitation equation? a F = G m1 m2 / r b F = G m1 m2 / r^2 c F = k q1 q2 / r^2 32 According to general relativity, gravity is caused by what? a An invisible Newtonian force field b Curvature of spacetime c Magnetic forces in space 33 What phenomenon does GR predict when light passes near a massive body? a Light accelerates beyond c b Gravitational lensing c Light stops completely 34 A key difference between GR and Newtonian gravity is that GR treats gravity as a consequence of what? a A magnetic field b A quantum entanglement force c Geometry of spacetime 35 What is the equivalence principle in GR? a Gravity is a real force only in space b Local experiments cannot distinguish gravity from acceleration c All mass is massless in free fall 36 How do gravitational disturbances propagate in general relativity? a As gravitational waves at the speed of light b At speeds slower than light c Instantaneously 37 What object defines a non-rotating black hole's boundary in GR? a Schwarzschild radius (event horizon) b Photon sphere only c Cosmic horizon unrelated to mass 38 Which Mercury observation supported GR? a Mercury's magnetic field reversal b Perihelion precession of Mercury c Mercury's orbital speed constant in all orbits 39 What is Hubble's Law in cosmology? a v = G M / r^2 b v = c / distance c v = H0 d, universe expands with distance 40 What is a primary implication of GR for gravity in the universe? a Space is flat regardless of mass b Mass-energy tells spacetime how to curve c Gravity is a separate quantum field

Cosmic Quest: Space Basics

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Cosmic Quest: Space BasicsOnline version

by Piyush Joshi

What is the smallest planet in our Solar System by orbit count of the Sun in our system?

Which planet has the most moons in our Solar System as of recent surveys?

What do we call a rock from space that reaches Earth's surface?

Which layer of Earth's atmosphere do most weather events occur in?

What is the primary fuel for the Sun’s energy production?

Which space telescope has provided stunning deep-space images beyond our atmosphere?

Which planet is known for its prominent ring system?

What is a galaxy ball of stars held together by gravity called?

Which dwarf planet resides in the Kuiper Belt and was once considered a planet?

Which mission first landed humans on the Moon?

What is a black hole?

What marks the boundary around a black hole beyond which nothing can escape?

What is Hawking radiation?

What is the singularity in a black hole?

Which theory describes the origin of the universe from a hot dense state?

Two strong evidences for black holes are X-ray binaries and gravitational waves. True or False?

What’s the difference between stellar-mass and supermassive black holes?

What does spacetime curvature around mass cause?

Approximately how old is the universe according to current estimates?

What is the information paradox related to black holes?

What is mass in physics?

Which unit is standard for mass?

What tool is commonly used to measure mass without changing it?

Weight depends on gravity; mass does not. True or false?

Which equation relates mass, force, and acceleration?

What is inertial mass a measure of?

Which two masses are equal if the objects are in the same gravity?

If mass doubles while acceleration stays the same, the force needed ...

Density is mass per unit what?

Mass–energy equivalence is expressed by which formula?

What is Newton's law of universal gravitation equation?

According to general relativity, gravity is caused by what?

What phenomenon does GR predict when light passes near a massive body?

A key difference between GR and Newtonian gravity is that GR treats gravity as a consequence of what?

What is the equivalence principle in GR?

How do gravitational disturbances propagate in general relativity?

What object defines a non-rotating black hole's boundary in GR?

Which Mercury observation supported GR?

What is Hubble's Law in cosmology?

What is a primary implication of GR for gravity in the universe?