topic two

• What are naked-eye craters?

  Naked-eye craters are large impact craters on the Moon that are visible from Earth without the use of a telescope or binoculars.
• What is the minimum diameter for a crater to be classified as a naked-eye crater?

  Typically larger than 50 km in diameter
• Why are naked-eye craters significant?

  They are part of the Moon's most prominent surface features.
• How are lunar craters primarily formed?

  By the impact of asteroids, comets, and other celestial bodies colliding with the Moon's surface.
• What is the process called that leads to the formation of lunar craters?

  Impact cratering
• What happens during a high-speed impact on the Moon?

  An asteroid vaporizes and creates a massive explosion, ejecting lunar material and forming a circular depression.
• Why are lunar craters preserved for billions of years?

  There is no erosion or tectonic activity on the Moon.
• What is the main reason there are more visible craters on the Moon compared to Earth?

  The Moon lacks an atmosphere and has minimal erosion, preserving craters.
• What are the main structural features of a typical lunar crater?

  Rim, wall, floor, central peak, and ejecta blanket.
• What is the rim of a lunar crater?

  The raised circular edge of the crater.
• What is the function of the ejecta blanket in a lunar crater?


  It is the material thrown out during impact that surrounds the crater.
• What is the central peak in a lunar crater?

  A raised area in the center of larger craters formed by the rebound of the crater floor after impact.
• Name one of the most prominent naked-eye craters on the Moon.

  Tycho
• What is a key characteristic of the crater Tycho?


  It has a bright ray system.
• What is the significance of crater albedo?

  Brighter craters stand out more against the darker lunar surface, increasing visibility.
• How does the location of a crater affect its visibility from Earth?

  Craters near the center of the visible face are easier to see than those near the edge.
• What role do lighting conditions play in crater visibility?

  The angle of sunlight on the Moon affects shadow patterns, influencing visibility.
• If a newly discovered lunar crater is large but less visible, what could be a reason?

  It is located near the edge (limb) of the Moon.
• What factor would likely make a lunar crater more visible from Earth?

  A higher albedo (brightness).