Grade 12 Science Astronomy quiz

📚 Quick Study Guide

• 🌌 The Universe: Everything that exists, from subatomic particles to galaxies, including space and time.
• 🔭 Telescopes: Instruments used to observe distant objects by collecting electromagnetic radiation. Types include refracting (lenses) and reflecting (mirrors) telescopes.
• ✨ Stars: Luminous spheres of plasma held together by their own gravity. Key properties include luminosity, temperature, and mass.
• 📏 Distances in Space: Measured in light-years (ly), parsecs (pc), and astronomical units (AU). 1 ly is the distance light travels in one year.
• 🔥 Stellar Evolution: The process by which a star changes over the course of its lifetime, from birth in a nebula to its eventual death as a white dwarf, neutron star, or black hole.
• ⚫️ Black Holes: Regions of spacetime with such strong gravitational effects that nothing, not even particles and electromagnetic radiation such as light, can escape from inside it.
• 💥 The Big Bang Theory: The prevailing cosmological model for the universe. It states that at some point in the distant past, all matter was contained at a single point, and the universe has been expanding ever since.

🌠 Practice Quiz

1. Which of the following is the primary component of stars?
   1. Hydrogen
   2. Helium
   3. Oxygen
2. What unit is commonly used to measure distances between galaxies?
   1. Kilometers
   2. Light-years
   3. Astronomical Units
3. What is the force responsible for the formation of stars?
   1. Electromagnetic Force
   2. Gravitational Force
   3. Nuclear Force
4. Which type of telescope uses lenses to gather and focus light?
   1. Reflecting Telescope
   2. Refracting Telescope
   3. Radio Telescope
5. What is the name given to the final stage in the life cycle of a massive star?
   1. White Dwarf
   2. Neutron Star
   3. Red Giant
6. What is the name of the theory describing the origin of the Universe?
   1. Steady State Theory
   2. Big Bang Theory
   3. Inflationary Theory
7. What is the event horizon of a black hole?
   1. The surface of the black hole
   2. The boundary beyond which nothing can escape
   3. The core of the black hole