P8- Space Physics

Cards (47)

  • What is at the center of our solar system?
    The Sun
  • What does heliocentric mean?
    The Sun is at the center
  • Name two dwarf planets that orbit the Sun.
    Pluto and Ceres
  • What other celestial bodies are found in our solar system?
    Asteroids and comets
  • How is our solar system positioned within the Milky Way galaxy?
    It is a small part of the Milky Way
  • What mnemonic helps remember the order of the planets?
    • My Very Early Morning Jam Sandwich Usually Nauseates
  • What are smaller planets primarily made of?
    Rock
  • What are larger planets primarily made of?
    Gas
  • How do all planets orbit the Sun?
    On the same plane
  • Do all planets rotate at the same speed?
    No, they rotate at different speeds
  • What can cause a planet to rotate in the opposite direction?
    Past collisions affecting its axis
  • Why do larger planets have rings?
    Their strong gravitational field attracts debris
  • What was the initial model of the solar system?
    The geocentric model
  • What did the geocentric model propose?
    Everything orbited the Earth
  • What was a key feature of the geocentric model?
    Perfect circular orbits
  • What evidence supported the heliocentric model?
    Mars' retrograde motion
  • Why does Mars appear to reverse its direction in the sky?
    Earth overtakes Mars in its orbit
  • What did Galileo observe that challenged the geocentric model?
    Moons orbiting Jupiter
  • What did Kepler discover about planetary orbits?
    They orbit in ellipses
  • What causes a planet to change direction as it orbits the Sun?
    The gravitational force from the Sun
  • How does the velocity of a planet change as it orbits?
    It is always changing
  • What happens to a planet's speed due to gravitational force?
    It accelerates without increasing speed
  • What conditions lead to a stable orbit?
    • Closer proximity to the Sun increases gravitational attraction
    • Increased force leads to increased acceleration
    • Orbital speed of the planet increases
  • What is the initial state of a star's life cycle?
    A dust and gas cloud
  • What draws gas and dust particles together in a galaxy?
    Gravitational attraction
  • What happens to the cloud of gas and dust as particles get closer?
    It becomes more concentrated
  • What increases as the particles in the cloud are pushed together?
    Temperature and pressure
  • What occurs when pressure in the cloud becomes great enough?
    Fusion of gas/dust particles occurs
  • What is produced when hydrogen nuclei fuse together?
    Helium nuclei
  • What happens when a star runs out of gas to fuse?
    It collapses
  • What is the result of fusion in a star?
    A large amount of energy is created
  • What balances the gravitational collapse of a star?
    The energy released from fusion
  • What occurs if a massive star collapses?
    It produces a supernova
  • What remains after a massive star's supernova?
    A neutron star or black hole
  • What happens to a normal-sized star after it collapses?
    It produces a planetary nebula
  • What remains after a normal-sized star's collapse?
    A white dwarf
  • What does red shift indicate about galaxies?
    They are moving away from Earth
  • What does the change in distance of galaxies' speed indicate?
    Evidence of an expanding universe
  • How can the expansion of the universe be visualized?
    As an expanding balloon with galaxies on it
  • What happens to the wavelength of light from a galaxy moving away?
    It becomes red-shifted